[{"data":1,"prerenderedAt":4282},["ShallowReactive",2],{"blog-\u002Fblog\u002Fangular\u002Frxjs\u002Frxjs-notes":3},{"id":4,"title":5,"body":6,"date":4272,"description":4273,"extension":4274,"meta":4275,"navigation":125,"path":4276,"seo":4277,"stem":4278,"tags":4279,"__hash__":4281},"blog\u002Fblog\u002Fangular\u002FRxjs\u002FRxJs-Notes.md","Things you need to know about RxJS",{"type":7,"value":8,"toc":4193},"minimark",[9,14,24,30,46,53,56,100,107,110,145,152,155,233,237,241,249,252,348,355,360,435,442,448,523,539,543,550,553,622,629,636,689,696,699,762,765,901,908,915,918,986,993,996,1072,1079,1082,1141,1148,1151,1230,1237,1243,1248,1359,1362,1366,1373,1376,1384,1438,1446,1449,1457,1596,1604,1607,1763,1780,1788,1791,1799,1961,1975,1981,1984,2077,2081,2088,2096,2235,2255,2262,2265,2345,2349,2356,2359,2532,2536,2540,2544,2548,2552,2556,2559,2567,2571,2574,2582,2588,2763,2768,2771,2906,2916,2982,2990,2996,3182,3187,3382,3391,3475,3480,3639,3644,3647,3804,3808,3811,3815,3818,3829,3967,3971,3974,3977,3988,4114,4117,4189],[10,11,13],"h1",{"id":12},"_1-key-observable-creation-functions","1. Key Observable Creation Functions",[15,16,18,19,23],"h2",{"id":17},"_11-of-operator","1.1 ",[20,21,22],"code",{},"of"," operator",[25,26,27,29],"p",{},[20,28,22],{}," operator is used to create an observablt to emit a sequence of values.",[31,32,37],"pre",{"className":33,"code":34,"language":35,"meta":36,"style":36},"language-javascript shiki shiki-themes github-light github-dark","const temp$ = of(1,2,3).subscribe(console.log);\n","javascript","",[20,38,39],{"__ignoreMap":36},[40,41,44],"span",{"class":42,"line":43},"line",1,[40,45,34],{},[15,47,49,50],{"id":48},"_12-from","1.2 ",[20,51,52],{},"from",[25,54,55],{},"Converts an iteratable into observable",[31,57,61],{"className":58,"code":59,"language":60,"meta":36,"style":36},"language-typescript shiki shiki-themes github-light github-dark","from([4,5,6]).subscribe(console.log)        \u002F\u002F emits 4, 5, 6\n","typescript",[20,62,63],{"__ignoreMap":36},[40,64,65,68,72,76,79,82,84,87,90,93,96],{"class":42,"line":43},[40,66,52],{"class":67},"sScJk",[40,69,71],{"class":70},"sVt8B","([",[40,73,75],{"class":74},"sj4cs","4",[40,77,78],{"class":70},",",[40,80,81],{"class":74},"5",[40,83,78],{"class":70},[40,85,86],{"class":74},"6",[40,88,89],{"class":70},"]).",[40,91,92],{"class":67},"subscribe",[40,94,95],{"class":70},"(console.log)        ",[40,97,99],{"class":98},"sJ8bj","\u002F\u002F emits 4, 5, 6\n",[15,101,103,104],{"id":102},"_13-interval","1.3 ",[20,105,106],{},"interval",[25,108,109],{},"Sends a number after every interval",[31,111,113],{"className":33,"code":112,"language":35,"meta":36,"style":36},"const source$ = interval(1000);\n\nconst subscription= source$.subscribe((x)=>{\nconsole.log(x);     \u002F\u002F log 1, 2, 3, 4 ...... after every 1000 millisecond\n});\n",[20,114,115,120,127,133,139],{"__ignoreMap":36},[40,116,117],{"class":42,"line":43},[40,118,119],{},"const source$ = interval(1000);\n",[40,121,123],{"class":42,"line":122},2,[40,124,126],{"emptyLinePlaceholder":125},true,"\n",[40,128,130],{"class":42,"line":129},3,[40,131,132],{},"const subscription= source$.subscribe((x)=>{\n",[40,134,136],{"class":42,"line":135},4,[40,137,138],{},"console.log(x);     \u002F\u002F log 1, 2, 3, 4 ...... after every 1000 millisecond\n",[40,140,142],{"class":42,"line":141},5,[40,143,144],{},"});\n",[15,146,148,149],{"id":147},"_14-timer","1.4 ",[20,150,151],{},"timer",[25,153,154],{},"timer(dueTime, period?): Emits one value after dueTime, then optionally continues to emit values every period milliseconds",[31,156,160],{"className":157,"code":158,"language":159,"meta":36,"style":36},"language-js shiki shiki-themes github-light github-dark","timer(2000).subscribe(val => console.log(val)); \u002F\u002F 0 after 2 seconds\ntimer(1000, 500).subscribe(val => console.log(val)); \u002F\u002F 0 after 1s, then 1 after 0.5s, etc.\n","js",[20,161,162,199],{"__ignoreMap":36},[40,163,164,166,169,172,175,177,179,183,187,190,193,196],{"class":42,"line":43},[40,165,151],{"class":67},[40,167,168],{"class":70},"(",[40,170,171],{"class":74},"2000",[40,173,174],{"class":70},").",[40,176,92],{"class":67},[40,178,168],{"class":70},[40,180,182],{"class":181},"s4XuR","val",[40,184,186],{"class":185},"szBVR"," =>",[40,188,189],{"class":70}," console.",[40,191,192],{"class":67},"log",[40,194,195],{"class":70},"(val)); ",[40,197,198],{"class":98},"\u002F\u002F 0 after 2 seconds\n",[40,200,201,203,205,208,211,214,216,218,220,222,224,226,228,230],{"class":42,"line":122},[40,202,151],{"class":67},[40,204,168],{"class":70},[40,206,207],{"class":74},"1000",[40,209,210],{"class":70},", ",[40,212,213],{"class":74},"500",[40,215,174],{"class":70},[40,217,92],{"class":67},[40,219,168],{"class":70},[40,221,182],{"class":181},[40,223,186],{"class":185},[40,225,189],{"class":70},[40,227,192],{"class":67},[40,229,195],{"class":70},[40,231,232],{"class":98},"\u002F\u002F 0 after 1s, then 1 after 0.5s, etc.\n",[10,234,236],{"id":235},"_2-commonly-used-operators-piping","2. Commonly Used Operators (Piping)",[15,238,240],{"id":239},"_21-transformation-operators","2.1 Transformation Operators",[242,243,245,246],"h3",{"id":244},"_211-map","2.1.1 ",[20,247,248],{},"map",[25,250,251],{},"Use to transform the value received from observable",[31,253,255],{"className":157,"code":254,"language":159,"meta":36,"style":36},"from([1,2,3]).pipe(\n    map(x => x*10 )\n)\n.subscribe(x => {\n    console.log(x);     \u002F\u002F logs 10,20 30\n})\n",[20,256,257,284,308,313,329,342],{"__ignoreMap":36},[40,258,259,261,263,266,268,271,273,276,278,281],{"class":42,"line":43},[40,260,52],{"class":67},[40,262,71],{"class":70},[40,264,265],{"class":74},"1",[40,267,78],{"class":70},[40,269,270],{"class":74},"2",[40,272,78],{"class":70},[40,274,275],{"class":74},"3",[40,277,89],{"class":70},[40,279,280],{"class":67},"pipe",[40,282,283],{"class":70},"(\n",[40,285,286,289,291,294,296,299,302,305],{"class":42,"line":122},[40,287,288],{"class":67},"    map",[40,290,168],{"class":70},[40,292,293],{"class":181},"x",[40,295,186],{"class":185},[40,297,298],{"class":70}," x",[40,300,301],{"class":185},"*",[40,303,304],{"class":74},"10",[40,306,307],{"class":70}," )\n",[40,309,310],{"class":42,"line":129},[40,311,312],{"class":70},")\n",[40,314,315,318,320,322,324,326],{"class":42,"line":135},[40,316,317],{"class":70},".",[40,319,92],{"class":67},[40,321,168],{"class":70},[40,323,293],{"class":181},[40,325,186],{"class":185},[40,327,328],{"class":70}," {\n",[40,330,331,334,336,339],{"class":42,"line":141},[40,332,333],{"class":70},"    console.",[40,335,192],{"class":67},[40,337,338],{"class":70},"(x);     ",[40,340,341],{"class":98},"\u002F\u002F logs 10,20 30\n",[40,343,345],{"class":42,"line":344},6,[40,346,347],{"class":70},"})\n",[242,349,351,352],{"id":350},"_212-pluck","2.1.2 ",[20,353,354],{},"pluck",[25,356,357,358],{},"Use to extract a property from an observable, but deprecated in favor of ",[20,359,248],{},[31,361,363],{"className":157,"code":362,"language":159,"meta":36,"style":36},"of({ name: 'Alice', age: 30 })\n.pipe(pluck('name'))\n.subscribe(x=>{\n    console.log (x);        \u002F\u002F Alice\n})\n",[20,364,365,385,403,419,431],{"__ignoreMap":36},[40,366,367,369,372,376,379,382],{"class":42,"line":43},[40,368,22],{"class":67},[40,370,371],{"class":70},"({ name: ",[40,373,375],{"class":374},"sZZnC","'Alice'",[40,377,378],{"class":70},", age: ",[40,380,381],{"class":74},"30",[40,383,384],{"class":70}," })\n",[40,386,387,389,391,393,395,397,400],{"class":42,"line":122},[40,388,317],{"class":70},[40,390,280],{"class":67},[40,392,168],{"class":70},[40,394,354],{"class":67},[40,396,168],{"class":70},[40,398,399],{"class":374},"'name'",[40,401,402],{"class":70},"))\n",[40,404,405,407,409,411,413,416],{"class":42,"line":129},[40,406,317],{"class":70},[40,408,92],{"class":67},[40,410,168],{"class":70},[40,412,293],{"class":181},[40,414,415],{"class":185},"=>",[40,417,418],{"class":70},"{\n",[40,420,421,423,425,428],{"class":42,"line":135},[40,422,333],{"class":70},[40,424,192],{"class":67},[40,426,427],{"class":70}," (x);        ",[40,429,430],{"class":98},"\u002F\u002F Alice\n",[40,432,433],{"class":42,"line":141},[40,434,347],{"class":70},[242,436,438,439],{"id":437},"_213-scan","2.1.3 ",[20,440,441],{},"scan",[25,443,444,447],{},[20,445,446],{},"scan(accumulator, seed?)",": Applies an accumulator function over the source Observable, and returns each intermediate result. Like reduce, but emits every step.",[31,449,451],{"className":157,"code":450,"language":159,"meta":36,"style":36},"of(1, 2, 3, 4).pipe(\n  scan((acc, value) => acc + value, 0)\n).subscribe(console.log);\n",[20,452,453,479,514],{"__ignoreMap":36},[40,454,455,457,459,461,463,465,467,469,471,473,475,477],{"class":42,"line":43},[40,456,22],{"class":67},[40,458,168],{"class":70},[40,460,265],{"class":74},[40,462,210],{"class":70},[40,464,270],{"class":74},[40,466,210],{"class":70},[40,468,275],{"class":74},[40,470,210],{"class":70},[40,472,75],{"class":74},[40,474,174],{"class":70},[40,476,280],{"class":67},[40,478,283],{"class":70},[40,480,481,484,487,490,492,495,498,500,503,506,509,512],{"class":42,"line":122},[40,482,483],{"class":67},"  scan",[40,485,486],{"class":70},"((",[40,488,489],{"class":181},"acc",[40,491,210],{"class":70},[40,493,494],{"class":181},"value",[40,496,497],{"class":70},") ",[40,499,415],{"class":185},[40,501,502],{"class":70}," acc ",[40,504,505],{"class":185},"+",[40,507,508],{"class":70}," value, ",[40,510,511],{"class":74},"0",[40,513,312],{"class":70},[40,515,516,518,520],{"class":42,"line":129},[40,517,174],{"class":70},[40,519,92],{"class":67},[40,521,522],{"class":70},"(console.log);\n",[524,525,526,530,533,536],"ul",{},[527,528,529],"li",{},"0 + 1 = 1 → emitted",[527,531,532],{},"1 + 2 = 3 → emitted",[527,534,535],{},"3 + 3 = 6 → emitted",[527,537,538],{},"6 + 4 = 10 → emitted",[15,540,542],{"id":541},"_22-filtering-operators","2.2 Filtering Operators",[242,544,546,547],{"id":545},"_221-filter","2.2.1 ",[20,548,549],{},"filter",[25,551,552],{},"filter(predicate): Emits only those values from the source Observable that satisfy a specified predicate function",[31,554,556],{"className":157,"code":555,"language":159,"meta":36,"style":36},"of(1, 2, 3, 4).pipe(\n  filter(x => x%2 === 0)\n).subscribe(console.log);   \u002F\u002F 2,4\n",[20,557,558,584,610],{"__ignoreMap":36},[40,559,560,562,564,566,568,570,572,574,576,578,580,582],{"class":42,"line":43},[40,561,22],{"class":67},[40,563,168],{"class":70},[40,565,265],{"class":74},[40,567,210],{"class":70},[40,569,270],{"class":74},[40,571,210],{"class":70},[40,573,275],{"class":74},[40,575,210],{"class":70},[40,577,75],{"class":74},[40,579,174],{"class":70},[40,581,280],{"class":67},[40,583,283],{"class":70},[40,585,586,589,591,593,595,597,600,602,605,608],{"class":42,"line":122},[40,587,588],{"class":67},"  filter",[40,590,168],{"class":70},[40,592,293],{"class":181},[40,594,186],{"class":185},[40,596,298],{"class":70},[40,598,599],{"class":185},"%",[40,601,270],{"class":74},[40,603,604],{"class":185}," ===",[40,606,607],{"class":74}," 0",[40,609,312],{"class":70},[40,611,612,614,616,619],{"class":42,"line":129},[40,613,174],{"class":70},[40,615,92],{"class":67},[40,617,618],{"class":70},"(console.log);   ",[40,620,621],{"class":98},"\u002F\u002F 2,4\n",[242,623,625,626],{"id":624},"_222-takecount","2.2.2 ",[20,627,628],{},"take(count)",[25,630,631,632,635],{},"Emits only the first ",[20,633,634],{},"count"," values emitted by the source Observable.",[31,637,639],{"className":157,"code":638,"language":159,"meta":36,"style":36},"of(1, 2, 3, 4).pipe(\n  take(2)\n).subscribe(console.log);   \u002F\u002F 1,2\n",[20,640,641,667,678],{"__ignoreMap":36},[40,642,643,645,647,649,651,653,655,657,659,661,663,665],{"class":42,"line":43},[40,644,22],{"class":67},[40,646,168],{"class":70},[40,648,265],{"class":74},[40,650,210],{"class":70},[40,652,270],{"class":74},[40,654,210],{"class":70},[40,656,275],{"class":74},[40,658,210],{"class":70},[40,660,75],{"class":74},[40,662,174],{"class":70},[40,664,280],{"class":67},[40,666,283],{"class":70},[40,668,669,672,674,676],{"class":42,"line":122},[40,670,671],{"class":67},"  take",[40,673,168],{"class":70},[40,675,270],{"class":74},[40,677,312],{"class":70},[40,679,680,682,684,686],{"class":42,"line":129},[40,681,174],{"class":70},[40,683,92],{"class":67},[40,685,618],{"class":70},[40,687,688],{"class":98},"\u002F\u002F 1,2\n",[242,690,692,693],{"id":691},"_223-takeuntilnotifier","2.2.3 ",[20,694,695],{},"takeUntil(notifier)",[25,697,698],{},"takeUntil(notifier): Emits values until the notifier Observable emits a value",[31,700,702],{"className":157,"code":701,"language":159,"meta":36,"style":36}," interval(1000).pipe(\n      takeUntil(timer(5000)) \u002F\u002F Emits for 5 seconds\n    ).subscribe(val => console.log(val));       \u002F\u002F 0, 1, 2, 3\n\n",[20,703,704,719,739],{"__ignoreMap":36},[40,705,706,709,711,713,715,717],{"class":42,"line":43},[40,707,708],{"class":67}," interval",[40,710,168],{"class":70},[40,712,207],{"class":74},[40,714,174],{"class":70},[40,716,280],{"class":67},[40,718,283],{"class":70},[40,720,721,724,726,728,730,733,736],{"class":42,"line":122},[40,722,723],{"class":67},"      takeUntil",[40,725,168],{"class":70},[40,727,151],{"class":67},[40,729,168],{"class":70},[40,731,732],{"class":74},"5000",[40,734,735],{"class":70},")) ",[40,737,738],{"class":98},"\u002F\u002F Emits for 5 seconds\n",[40,740,741,744,746,748,750,752,754,756,759],{"class":42,"line":129},[40,742,743],{"class":70},"    ).",[40,745,92],{"class":67},[40,747,168],{"class":70},[40,749,182],{"class":181},[40,751,186],{"class":185},[40,753,189],{"class":70},[40,755,192],{"class":67},[40,757,758],{"class":70},"(val));       ",[40,760,761],{"class":98},"\u002F\u002F 0, 1, 2, 3\n",[25,763,764],{},"Another example",[31,766,770],{"className":767,"code":768,"language":769,"meta":36,"style":36},"language-ts shiki shiki-themes github-light github-dark","private destroy$ = new Subject\u003Cvoid>();\n\nngOnInit() {\n  observable$.pipe(\n    takeUntil(this.destroy$)\n  ).subscribe(data => console.log(data));\n}\n\nngOnDestroy() {\n  this.destroy$.next();\n  this.destroy$.complete();\n}\n","ts",[20,771,772,795,799,807,816,829,850,856,861,869,884,896],{"__ignoreMap":36},[40,773,774,777,780,783,786,789,792],{"class":42,"line":43},[40,775,776],{"class":70},"private destroy$ ",[40,778,779],{"class":185},"=",[40,781,782],{"class":185}," new",[40,784,785],{"class":67}," Subject",[40,787,788],{"class":70},"\u003C",[40,790,791],{"class":74},"void",[40,793,794],{"class":70},">();\n",[40,796,797],{"class":42,"line":122},[40,798,126],{"emptyLinePlaceholder":125},[40,800,801,804],{"class":42,"line":129},[40,802,803],{"class":67},"ngOnInit",[40,805,806],{"class":70},"() {\n",[40,808,809,812,814],{"class":42,"line":135},[40,810,811],{"class":70},"  observable$.",[40,813,280],{"class":67},[40,815,283],{"class":70},[40,817,818,821,823,826],{"class":42,"line":141},[40,819,820],{"class":67},"    takeUntil",[40,822,168],{"class":70},[40,824,825],{"class":74},"this",[40,827,828],{"class":70},".destroy$)\n",[40,830,831,834,836,838,841,843,845,847],{"class":42,"line":344},[40,832,833],{"class":70},"  ).",[40,835,92],{"class":67},[40,837,168],{"class":70},[40,839,840],{"class":181},"data",[40,842,186],{"class":185},[40,844,189],{"class":70},[40,846,192],{"class":67},[40,848,849],{"class":70},"(data));\n",[40,851,853],{"class":42,"line":852},7,[40,854,855],{"class":70},"}\n",[40,857,859],{"class":42,"line":858},8,[40,860,126],{"emptyLinePlaceholder":125},[40,862,864,867],{"class":42,"line":863},9,[40,865,866],{"class":67},"ngOnDestroy",[40,868,806],{"class":70},[40,870,872,875,878,881],{"class":42,"line":871},10,[40,873,874],{"class":74},"  this",[40,876,877],{"class":70},".destroy$.",[40,879,880],{"class":67},"next",[40,882,883],{"class":70},"();\n",[40,885,887,889,891,894],{"class":42,"line":886},11,[40,888,874],{"class":74},[40,890,877],{"class":70},[40,892,893],{"class":67},"complete",[40,895,883],{"class":70},[40,897,899],{"class":42,"line":898},12,[40,900,855],{"class":70},[242,902,904,905],{"id":903},"_224-debouncetime","2.2.4 ",[20,906,907],{},"debounceTime",[242,909,911,912],{"id":910},"_225-distinctuntilchanged","2.2.5 ",[20,913,914],{},"distinctUntilChanged",[25,916,917],{},"Emits all values that are distinct by comparison from the previous value.",[31,919,921],{"className":157,"code":920,"language":159,"meta":36,"style":36},"of(1, 1, 2, 2, 1, 3).pipe(\n  distinctUntilChanged()\n).subscribe(val => console.log(val)); \u002F\u002F 1, 2, 1, 3\n",[20,922,923,957,965],{"__ignoreMap":36},[40,924,925,927,929,931,933,935,937,939,941,943,945,947,949,951,953,955],{"class":42,"line":43},[40,926,22],{"class":67},[40,928,168],{"class":70},[40,930,265],{"class":74},[40,932,210],{"class":70},[40,934,265],{"class":74},[40,936,210],{"class":70},[40,938,270],{"class":74},[40,940,210],{"class":70},[40,942,270],{"class":74},[40,944,210],{"class":70},[40,946,265],{"class":74},[40,948,210],{"class":70},[40,950,275],{"class":74},[40,952,174],{"class":70},[40,954,280],{"class":67},[40,956,283],{"class":70},[40,958,959,962],{"class":42,"line":122},[40,960,961],{"class":67},"  distinctUntilChanged",[40,963,964],{"class":70},"()\n",[40,966,967,969,971,973,975,977,979,981,983],{"class":42,"line":129},[40,968,174],{"class":70},[40,970,92],{"class":67},[40,972,168],{"class":70},[40,974,182],{"class":181},[40,976,186],{"class":185},[40,978,189],{"class":70},[40,980,192],{"class":67},[40,982,195],{"class":70},[40,984,985],{"class":98},"\u002F\u002F 1, 2, 1, 3\n",[242,987,989,990],{"id":988},"_226-first","2.2.6 ",[20,991,992],{},"first",[25,994,995],{},"first(predicate?): Emits only the first value (or the first value that satisfies a predicate). Completes immediately.",[31,997,999],{"className":157,"code":998,"language":159,"meta":36,"style":36},"of(10,20,30).pipe(\n    first(x=> x === 20)\n)\n.subscribe(x=> console.log(x)); \u002F\u002F 20\n",[20,1000,1001,1024,1046,1050],{"__ignoreMap":36},[40,1002,1003,1005,1007,1009,1011,1014,1016,1018,1020,1022],{"class":42,"line":43},[40,1004,22],{"class":67},[40,1006,168],{"class":70},[40,1008,304],{"class":74},[40,1010,78],{"class":70},[40,1012,1013],{"class":74},"20",[40,1015,78],{"class":70},[40,1017,381],{"class":74},[40,1019,174],{"class":70},[40,1021,280],{"class":67},[40,1023,283],{"class":70},[40,1025,1026,1029,1031,1033,1035,1038,1041,1044],{"class":42,"line":122},[40,1027,1028],{"class":67},"    first",[40,1030,168],{"class":70},[40,1032,293],{"class":181},[40,1034,415],{"class":185},[40,1036,1037],{"class":70}," x ",[40,1039,1040],{"class":185},"===",[40,1042,1043],{"class":74}," 20",[40,1045,312],{"class":70},[40,1047,1048],{"class":42,"line":129},[40,1049,312],{"class":70},[40,1051,1052,1054,1056,1058,1060,1062,1064,1066,1069],{"class":42,"line":135},[40,1053,317],{"class":70},[40,1055,92],{"class":67},[40,1057,168],{"class":70},[40,1059,293],{"class":181},[40,1061,415],{"class":185},[40,1063,189],{"class":70},[40,1065,192],{"class":67},[40,1067,1068],{"class":70},"(x)); ",[40,1070,1071],{"class":98},"\u002F\u002F 20\n",[242,1073,1075,1076],{"id":1074},"_227-last","2.2.7 ",[20,1077,1078],{},"last",[25,1080,1081],{},"last(predicate?): Emits only the last value (or the last value that satisfies a predicate) before the observable completes.",[31,1083,1085],{"className":157,"code":1084,"language":159,"meta":36,"style":36},"of(10,20,30).pipe(\n    last()\n)\n.subscribe(x=> console.log(x)); \u002F\u002F 30\n",[20,1086,1087,1109,1116,1120],{"__ignoreMap":36},[40,1088,1089,1091,1093,1095,1097,1099,1101,1103,1105,1107],{"class":42,"line":43},[40,1090,22],{"class":67},[40,1092,168],{"class":70},[40,1094,304],{"class":74},[40,1096,78],{"class":70},[40,1098,1013],{"class":74},[40,1100,78],{"class":70},[40,1102,381],{"class":74},[40,1104,174],{"class":70},[40,1106,280],{"class":67},[40,1108,283],{"class":70},[40,1110,1111,1114],{"class":42,"line":122},[40,1112,1113],{"class":67},"    last",[40,1115,964],{"class":70},[40,1117,1118],{"class":42,"line":129},[40,1119,312],{"class":70},[40,1121,1122,1124,1126,1128,1130,1132,1134,1136,1138],{"class":42,"line":135},[40,1123,317],{"class":70},[40,1125,92],{"class":67},[40,1127,168],{"class":70},[40,1129,293],{"class":181},[40,1131,415],{"class":185},[40,1133,189],{"class":70},[40,1135,192],{"class":67},[40,1137,1068],{"class":70},[40,1139,1140],{"class":98},"\u002F\u002F 30\n",[242,1142,1144,1145],{"id":1143},"_228-skip","2.2.8 ",[20,1146,1147],{},"skip",[25,1149,1150],{},"Skip a certain number of emitted values before continuing to process them. Useful for ignoring default values or headers.",[31,1152,1154],{"className":767,"code":1153,"language":769,"meta":36,"style":36},"of(1, 2, 3, 4, 5).pipe(\n    skip(2)\n)\n.subscribe(x => {\n    console.log(x);     \u002F\u002F 3,4,5\n}); \n",[20,1155,1156,1186,1197,1201,1215,1226],{"__ignoreMap":36},[40,1157,1158,1160,1162,1164,1166,1168,1170,1172,1174,1176,1178,1180,1182,1184],{"class":42,"line":43},[40,1159,22],{"class":67},[40,1161,168],{"class":70},[40,1163,265],{"class":74},[40,1165,210],{"class":70},[40,1167,270],{"class":74},[40,1169,210],{"class":70},[40,1171,275],{"class":74},[40,1173,210],{"class":70},[40,1175,75],{"class":74},[40,1177,210],{"class":70},[40,1179,81],{"class":74},[40,1181,174],{"class":70},[40,1183,280],{"class":67},[40,1185,283],{"class":70},[40,1187,1188,1191,1193,1195],{"class":42,"line":122},[40,1189,1190],{"class":67},"    skip",[40,1192,168],{"class":70},[40,1194,270],{"class":74},[40,1196,312],{"class":70},[40,1198,1199],{"class":42,"line":129},[40,1200,312],{"class":70},[40,1202,1203,1205,1207,1209,1211,1213],{"class":42,"line":135},[40,1204,317],{"class":70},[40,1206,92],{"class":67},[40,1208,168],{"class":70},[40,1210,293],{"class":181},[40,1212,186],{"class":185},[40,1214,328],{"class":70},[40,1216,1217,1219,1221,1223],{"class":42,"line":141},[40,1218,333],{"class":70},[40,1220,192],{"class":67},[40,1222,338],{"class":70},[40,1224,1225],{"class":98},"\u002F\u002F 3,4,5\n",[40,1227,1228],{"class":42,"line":344},[40,1229,144],{"class":70},[242,1231,1233,1234],{"id":1232},"_229-takewhile","2.2.9 ",[20,1235,1236],{},"takeWhile",[25,1238,1239,1240,1242],{},"The ",[20,1241,1236],{}," operator in RxJS is used to emit values from an observable until a condition fails—after which, the observable completes immediately.",[25,1244,1245],{},[20,1246,1247],{},"takeWhile(predicate: (value, index) => boolean)",[31,1249,1251],{"className":767,"code":1250,"language":769,"meta":36,"style":36},"import { of } from 'rxjs';\nimport { takeWhile } from 'rxjs\u002Foperators';\n\nof(1, 2, 3, 4, 5, 6, 7).pipe(\n  takeWhile(value => value \u003C 5)\n).subscribe(console.log); \u002F\u002F 1, 2, 3, 4\n\n",[20,1252,1253,1269,1283,1287,1326,1347],{"__ignoreMap":36},[40,1254,1255,1258,1261,1263,1266],{"class":42,"line":43},[40,1256,1257],{"class":185},"import",[40,1259,1260],{"class":70}," { of } ",[40,1262,52],{"class":185},[40,1264,1265],{"class":374}," 'rxjs'",[40,1267,1268],{"class":70},";\n",[40,1270,1271,1273,1276,1278,1281],{"class":42,"line":122},[40,1272,1257],{"class":185},[40,1274,1275],{"class":70}," { takeWhile } ",[40,1277,52],{"class":185},[40,1279,1280],{"class":374}," 'rxjs\u002Foperators'",[40,1282,1268],{"class":70},[40,1284,1285],{"class":42,"line":129},[40,1286,126],{"emptyLinePlaceholder":125},[40,1288,1289,1291,1293,1295,1297,1299,1301,1303,1305,1307,1309,1311,1313,1315,1317,1320,1322,1324],{"class":42,"line":135},[40,1290,22],{"class":67},[40,1292,168],{"class":70},[40,1294,265],{"class":74},[40,1296,210],{"class":70},[40,1298,270],{"class":74},[40,1300,210],{"class":70},[40,1302,275],{"class":74},[40,1304,210],{"class":70},[40,1306,75],{"class":74},[40,1308,210],{"class":70},[40,1310,81],{"class":74},[40,1312,210],{"class":70},[40,1314,86],{"class":74},[40,1316,210],{"class":70},[40,1318,1319],{"class":74},"7",[40,1321,174],{"class":70},[40,1323,280],{"class":67},[40,1325,283],{"class":70},[40,1327,1328,1331,1333,1335,1337,1340,1342,1345],{"class":42,"line":141},[40,1329,1330],{"class":67},"  takeWhile",[40,1332,168],{"class":70},[40,1334,494],{"class":181},[40,1336,186],{"class":185},[40,1338,1339],{"class":70}," value ",[40,1341,788],{"class":185},[40,1343,1344],{"class":74}," 5",[40,1346,312],{"class":70},[40,1348,1349,1351,1353,1356],{"class":42,"line":344},[40,1350,174],{"class":70},[40,1352,92],{"class":67},[40,1354,1355],{"class":70},"(console.log); ",[40,1357,1358],{"class":98},"\u002F\u002F 1, 2, 3, 4\n",[25,1360,1361],{},"As soon as the value 5 arrives, the condition value \u003C 5 fails, so the stream completes and 5 is not emitted.",[15,1363,1365],{"id":1364},"_23-combination-operators","2.3 Combination Operators",[242,1367,1369,1370],{"id":1368},"_231-concat","2.3.1 ",[20,1371,1372],{},"concat",[25,1374,1375],{},"concat(...observables):",[524,1377,1378,1381],{},[527,1379,1380],{},"Subscribes to Observables one after the other, in sequence.",[527,1382,1383],{},"Waits for one to complete before subscribing to the next.",[31,1385,1387],{"className":157,"code":1386,"language":159,"meta":36,"style":36},"concat(of(1,2), of(3,4)).subscribe(x=> console.log(x));     \u002F\u002F 1, 2, 3, 4\n",[20,1388,1389],{"__ignoreMap":36},[40,1390,1391,1393,1395,1397,1399,1401,1403,1405,1408,1410,1412,1414,1416,1418,1421,1423,1425,1427,1429,1431,1433,1436],{"class":42,"line":43},[40,1392,1372],{"class":67},[40,1394,168],{"class":70},[40,1396,22],{"class":67},[40,1398,168],{"class":70},[40,1400,265],{"class":74},[40,1402,78],{"class":70},[40,1404,270],{"class":74},[40,1406,1407],{"class":70},"), ",[40,1409,22],{"class":67},[40,1411,168],{"class":70},[40,1413,275],{"class":74},[40,1415,78],{"class":70},[40,1417,75],{"class":74},[40,1419,1420],{"class":70},")).",[40,1422,92],{"class":67},[40,1424,168],{"class":70},[40,1426,293],{"class":181},[40,1428,415],{"class":185},[40,1430,189],{"class":70},[40,1432,192],{"class":67},[40,1434,1435],{"class":70},"(x));     ",[40,1437,1358],{"class":98},[242,1439,1441,1442,1445],{"id":1440},"_232-zip-pair-items-by-index-like-a-zipper","2.3.2 ",[20,1443,1444],{},"zip"," (Pair items by index (like a zipper))",[25,1447,1448],{},"Imagine you have two zippers with teeth — one red and one blue. zip joins first red with first blue, second red with second blue, and so on.",[524,1450,1451,1454],{},[527,1452,1453],{},"📌 zip emits values only when all input observables emit at the same index.",[527,1455,1456],{},"Stops at the shortest observable.",[31,1458,1460],{"className":767,"code":1459,"language":769,"meta":36,"style":36},"import { zip, of } from 'rxjs';\n\nconst names$ = of('Alice', 'Bob', 'Charlie');\nconst ages$ = of(25, 30, 35);\n\nzip(names$, ages$).subscribe(([name, age]) => {\n  console.log(`${name} is ${age} years old`);\n});\n",[20,1461,1462,1475,1479,1510,1537,1541,1568,1592],{"__ignoreMap":36},[40,1463,1464,1466,1469,1471,1473],{"class":42,"line":43},[40,1465,1257],{"class":185},[40,1467,1468],{"class":70}," { zip, of } ",[40,1470,52],{"class":185},[40,1472,1265],{"class":374},[40,1474,1268],{"class":70},[40,1476,1477],{"class":42,"line":122},[40,1478,126],{"emptyLinePlaceholder":125},[40,1480,1481,1484,1487,1490,1493,1495,1497,1499,1502,1504,1507],{"class":42,"line":129},[40,1482,1483],{"class":185},"const",[40,1485,1486],{"class":74}," names$",[40,1488,1489],{"class":185}," =",[40,1491,1492],{"class":67}," of",[40,1494,168],{"class":70},[40,1496,375],{"class":374},[40,1498,210],{"class":70},[40,1500,1501],{"class":374},"'Bob'",[40,1503,210],{"class":70},[40,1505,1506],{"class":374},"'Charlie'",[40,1508,1509],{"class":70},");\n",[40,1511,1512,1514,1517,1519,1521,1523,1526,1528,1530,1532,1535],{"class":42,"line":135},[40,1513,1483],{"class":185},[40,1515,1516],{"class":74}," ages$",[40,1518,1489],{"class":185},[40,1520,1492],{"class":67},[40,1522,168],{"class":70},[40,1524,1525],{"class":74},"25",[40,1527,210],{"class":70},[40,1529,381],{"class":74},[40,1531,210],{"class":70},[40,1533,1534],{"class":74},"35",[40,1536,1509],{"class":70},[40,1538,1539],{"class":42,"line":141},[40,1540,126],{"emptyLinePlaceholder":125},[40,1542,1543,1545,1548,1550,1553,1556,1558,1561,1564,1566],{"class":42,"line":344},[40,1544,1444],{"class":67},[40,1546,1547],{"class":70},"(names$, ages$).",[40,1549,92],{"class":67},[40,1551,1552],{"class":70},"(([",[40,1554,1555],{"class":181},"name",[40,1557,210],{"class":70},[40,1559,1560],{"class":181},"age",[40,1562,1563],{"class":70},"]) ",[40,1565,415],{"class":185},[40,1567,328],{"class":70},[40,1569,1570,1573,1575,1577,1580,1582,1585,1587,1590],{"class":42,"line":852},[40,1571,1572],{"class":70},"  console.",[40,1574,192],{"class":67},[40,1576,168],{"class":70},[40,1578,1579],{"class":374},"`${",[40,1581,1555],{"class":70},[40,1583,1584],{"class":374},"} is ${",[40,1586,1560],{"class":70},[40,1588,1589],{"class":374},"} years old`",[40,1591,1509],{"class":70},[40,1593,1594],{"class":42,"line":858},[40,1595,144],{"class":70},[242,1597,1599,1600,1603],{"id":1598},"_233-merge-mix-items-as-they-arrive-like-merging-two-rivers","2.3.3 ",[20,1601,1602],{},"merge"," Mix items as they arrive (like merging two rivers)",[25,1605,1606],{},"merge(...observables): Subscribes to all inner Observables concurrently and merges their emissions into a single Observable.\nImagine two rivers flowing into one stream — whenever water comes from either side, it flows together into the same stream.",[31,1608,1610],{"className":767,"code":1609,"language":769,"meta":36,"style":36},"import { merge, interval } from 'rxjs';\nimport { map, take } from 'rxjs\u002Foperators';\n\nconst fast$ = interval(500).pipe(map(x => `Fast: ${x}`), take(3));\nconst slow$ = interval(1000).pipe(map(x => `Slow: ${x}`), take(2));\n\nmerge(fast$, slow$).subscribe(val => console.log(val));\n",[20,1611,1612,1625,1638,1642,1691,1737,1741],{"__ignoreMap":36},[40,1613,1614,1616,1619,1621,1623],{"class":42,"line":43},[40,1615,1257],{"class":185},[40,1617,1618],{"class":70}," { merge, interval } ",[40,1620,52],{"class":185},[40,1622,1265],{"class":374},[40,1624,1268],{"class":70},[40,1626,1627,1629,1632,1634,1636],{"class":42,"line":122},[40,1628,1257],{"class":185},[40,1630,1631],{"class":70}," { map, take } ",[40,1633,52],{"class":185},[40,1635,1280],{"class":374},[40,1637,1268],{"class":70},[40,1639,1640],{"class":42,"line":129},[40,1641,126],{"emptyLinePlaceholder":125},[40,1643,1644,1646,1649,1651,1653,1655,1657,1659,1661,1663,1665,1667,1669,1671,1674,1676,1679,1681,1684,1686,1688],{"class":42,"line":135},[40,1645,1483],{"class":185},[40,1647,1648],{"class":74}," fast$",[40,1650,1489],{"class":185},[40,1652,708],{"class":67},[40,1654,168],{"class":70},[40,1656,213],{"class":74},[40,1658,174],{"class":70},[40,1660,280],{"class":67},[40,1662,168],{"class":70},[40,1664,248],{"class":67},[40,1666,168],{"class":70},[40,1668,293],{"class":181},[40,1670,186],{"class":185},[40,1672,1673],{"class":374}," `Fast: ${",[40,1675,293],{"class":70},[40,1677,1678],{"class":374},"}`",[40,1680,1407],{"class":70},[40,1682,1683],{"class":67},"take",[40,1685,168],{"class":70},[40,1687,275],{"class":74},[40,1689,1690],{"class":70},"));\n",[40,1692,1693,1695,1698,1700,1702,1704,1706,1708,1710,1712,1714,1716,1718,1720,1723,1725,1727,1729,1731,1733,1735],{"class":42,"line":141},[40,1694,1483],{"class":185},[40,1696,1697],{"class":74}," slow$",[40,1699,1489],{"class":185},[40,1701,708],{"class":67},[40,1703,168],{"class":70},[40,1705,207],{"class":74},[40,1707,174],{"class":70},[40,1709,280],{"class":67},[40,1711,168],{"class":70},[40,1713,248],{"class":67},[40,1715,168],{"class":70},[40,1717,293],{"class":181},[40,1719,186],{"class":185},[40,1721,1722],{"class":374}," `Slow: ${",[40,1724,293],{"class":70},[40,1726,1678],{"class":374},[40,1728,1407],{"class":70},[40,1730,1683],{"class":67},[40,1732,168],{"class":70},[40,1734,270],{"class":74},[40,1736,1690],{"class":70},[40,1738,1739],{"class":42,"line":344},[40,1740,126],{"emptyLinePlaceholder":125},[40,1742,1743,1745,1748,1750,1752,1754,1756,1758,1760],{"class":42,"line":852},[40,1744,1602],{"class":67},[40,1746,1747],{"class":70},"(fast$, slow$).",[40,1749,92],{"class":67},[40,1751,168],{"class":70},[40,1753,182],{"class":181},[40,1755,186],{"class":185},[40,1757,189],{"class":70},[40,1759,192],{"class":67},[40,1761,1762],{"class":70},"(val));\n",[524,1764,1765,1768,1771,1774,1777],{},[527,1766,1767],{},"Fast: 0",[527,1769,1770],{},"Slow: 0",[527,1772,1773],{},"Fast: 1",[527,1775,1776],{},"Fast: 2",[527,1778,1779],{},"Slow: 1",[242,1781,1783,1784,1787],{"id":1782},"_234-combinelatest-combine-latest-from-all-when-any-emits","2.3.4 ",[20,1785,1786],{},"combineLatest",": Combine latest from all when any emits",[25,1789,1790],{},"You're watching two stock prices. When either changes, you want the latest price of both before making a decision.",[1792,1793,1794],"blockquote",{},[25,1795,1796,1798],{},[20,1797,1786],{}," waits until all observables have emitted at least once, then emits whenever any observable emits, using the latest value of each.",[31,1800,1802],{"className":767,"code":1801,"language":769,"meta":36,"style":36},"const temperature$ = interval(1000).pipe(map(x => `Temp ${20 + x}`), take(3));\nconst humidity$ = interval(1500).pipe(map(x => `Humidity ${50 + x}`), take(2));\n\ncombineLatest([temperature$, humidity$]).subscribe(([temp, humidity]) => {\n    console.log(`${temp}, ${humidity}`);\n});\n",[20,1803,1804,1855,1907,1911,1936,1957],{"__ignoreMap":36},[40,1805,1806,1808,1811,1813,1815,1817,1819,1821,1823,1825,1827,1829,1831,1833,1836,1838,1841,1843,1845,1847,1849,1851,1853],{"class":42,"line":43},[40,1807,1483],{"class":185},[40,1809,1810],{"class":74}," temperature$",[40,1812,1489],{"class":185},[40,1814,708],{"class":67},[40,1816,168],{"class":70},[40,1818,207],{"class":74},[40,1820,174],{"class":70},[40,1822,280],{"class":67},[40,1824,168],{"class":70},[40,1826,248],{"class":67},[40,1828,168],{"class":70},[40,1830,293],{"class":181},[40,1832,186],{"class":185},[40,1834,1835],{"class":374}," `Temp ${",[40,1837,1013],{"class":74},[40,1839,1840],{"class":185}," +",[40,1842,298],{"class":70},[40,1844,1678],{"class":374},[40,1846,1407],{"class":70},[40,1848,1683],{"class":67},[40,1850,168],{"class":70},[40,1852,275],{"class":74},[40,1854,1690],{"class":70},[40,1856,1857,1859,1862,1864,1866,1868,1871,1873,1875,1877,1879,1881,1883,1885,1888,1891,1893,1895,1897,1899,1901,1903,1905],{"class":42,"line":122},[40,1858,1483],{"class":185},[40,1860,1861],{"class":74}," humidity$",[40,1863,1489],{"class":185},[40,1865,708],{"class":67},[40,1867,168],{"class":70},[40,1869,1870],{"class":74},"1500",[40,1872,174],{"class":70},[40,1874,280],{"class":67},[40,1876,168],{"class":70},[40,1878,248],{"class":67},[40,1880,168],{"class":70},[40,1882,293],{"class":181},[40,1884,186],{"class":185},[40,1886,1887],{"class":374}," `Humidity ${",[40,1889,1890],{"class":74},"50",[40,1892,1840],{"class":185},[40,1894,298],{"class":70},[40,1896,1678],{"class":374},[40,1898,1407],{"class":70},[40,1900,1683],{"class":67},[40,1902,168],{"class":70},[40,1904,270],{"class":74},[40,1906,1690],{"class":70},[40,1908,1909],{"class":42,"line":129},[40,1910,126],{"emptyLinePlaceholder":125},[40,1912,1913,1915,1918,1920,1922,1925,1927,1930,1932,1934],{"class":42,"line":135},[40,1914,1786],{"class":67},[40,1916,1917],{"class":70},"([temperature$, humidity$]).",[40,1919,92],{"class":67},[40,1921,1552],{"class":70},[40,1923,1924],{"class":181},"temp",[40,1926,210],{"class":70},[40,1928,1929],{"class":181},"humidity",[40,1931,1563],{"class":70},[40,1933,415],{"class":185},[40,1935,328],{"class":70},[40,1937,1938,1940,1942,1944,1946,1948,1951,1953,1955],{"class":42,"line":141},[40,1939,333],{"class":70},[40,1941,192],{"class":67},[40,1943,168],{"class":70},[40,1945,1579],{"class":374},[40,1947,1924],{"class":70},[40,1949,1950],{"class":374},"}, ${",[40,1952,1929],{"class":70},[40,1954,1678],{"class":374},[40,1956,1509],{"class":70},[40,1958,1959],{"class":42,"line":344},[40,1960,144],{"class":70},[524,1962,1963,1966,1969,1972],{},[527,1964,1965],{},"Temp 20, Humidity 50  \u002F\u002F time 1500",[527,1967,1968],{},"Temp 21, Humidity 50  \u002F\u002F time 2000",[527,1970,1971],{},"Temp 22, Humidity 50  \u002F\u002F time 3000",[527,1973,1974],{},"Temp 22, Humidity 51  \u002F\u002F time 3000",[242,1976,1783,1978],{"id":1977},"_234-forkjoin",[20,1979,1980],{},"forkJoin",[25,1982,1983],{},"forkJoin waits for all observables to complete and then emits one array (or object) with the last emitted value from each observable",[31,1985,1987],{"className":157,"code":1986,"language":159,"meta":36,"style":36},"import { forkJoin } from 'rxjs';\n\nforkJoin([\n      getUser(),\n      getNotifications(),\n      getOrders(),\n    ])\n    .subscribe(([userResponse,notificationResponse,orderResponse]) => {\n\n    });\n",[20,1988,1989,2002,2006,2013,2021,2028,2035,2040,2068,2072],{"__ignoreMap":36},[40,1990,1991,1993,1996,1998,2000],{"class":42,"line":43},[40,1992,1257],{"class":185},[40,1994,1995],{"class":70}," { forkJoin } ",[40,1997,52],{"class":185},[40,1999,1265],{"class":374},[40,2001,1268],{"class":70},[40,2003,2004],{"class":42,"line":122},[40,2005,126],{"emptyLinePlaceholder":125},[40,2007,2008,2010],{"class":42,"line":129},[40,2009,1980],{"class":67},[40,2011,2012],{"class":70},"([\n",[40,2014,2015,2018],{"class":42,"line":135},[40,2016,2017],{"class":67},"      getUser",[40,2019,2020],{"class":70},"(),\n",[40,2022,2023,2026],{"class":42,"line":141},[40,2024,2025],{"class":67},"      getNotifications",[40,2027,2020],{"class":70},[40,2029,2030,2033],{"class":42,"line":344},[40,2031,2032],{"class":67},"      getOrders",[40,2034,2020],{"class":70},[40,2036,2037],{"class":42,"line":852},[40,2038,2039],{"class":70},"    ])\n",[40,2041,2042,2045,2047,2049,2052,2054,2057,2059,2062,2064,2066],{"class":42,"line":858},[40,2043,2044],{"class":70},"    .",[40,2046,92],{"class":67},[40,2048,1552],{"class":70},[40,2050,2051],{"class":181},"userResponse",[40,2053,78],{"class":70},[40,2055,2056],{"class":181},"notificationResponse",[40,2058,78],{"class":70},[40,2060,2061],{"class":181},"orderResponse",[40,2063,1563],{"class":70},[40,2065,415],{"class":185},[40,2067,328],{"class":70},[40,2069,2070],{"class":42,"line":863},[40,2071,126],{"emptyLinePlaceholder":125},[40,2073,2074],{"class":42,"line":871},[40,2075,2076],{"class":70},"    });\n",[15,2078,2080],{"id":2079},"_24-utility-operators","2.4 Utility Operators",[242,2082,2084,2085],{"id":2083},"_241-tap","2.4.1 ",[20,2086,2087],{},"tap",[524,2089,2090,2093],{},[527,2091,2092],{},"The tap operator is used to perform side effects for notifications from the source observable — without affecting the stream.",[527,2094,2095],{},"To log, debug, or trigger side effects (like analytics) without modifying the actual data flowing through the observable.",[31,2097,2099],{"className":767,"code":2098,"language":769,"meta":36,"style":36},"import { of } from 'rxjs';\nimport { tap, map } from 'rxjs\u002Foperators';\n\nof(1, 2, 3)\n  .pipe(\n    tap(value => console.log('Before map:', value)),\n    map(x => x * 10),\n    tap(value => console.log('After map:', value))\n  )\n  .subscribe();\n",[20,2100,2101,2113,2126,2130,2148,2157,2180,2200,2222,2227],{"__ignoreMap":36},[40,2102,2103,2105,2107,2109,2111],{"class":42,"line":43},[40,2104,1257],{"class":185},[40,2106,1260],{"class":70},[40,2108,52],{"class":185},[40,2110,1265],{"class":374},[40,2112,1268],{"class":70},[40,2114,2115,2117,2120,2122,2124],{"class":42,"line":122},[40,2116,1257],{"class":185},[40,2118,2119],{"class":70}," { tap, map } ",[40,2121,52],{"class":185},[40,2123,1280],{"class":374},[40,2125,1268],{"class":70},[40,2127,2128],{"class":42,"line":129},[40,2129,126],{"emptyLinePlaceholder":125},[40,2131,2132,2134,2136,2138,2140,2142,2144,2146],{"class":42,"line":135},[40,2133,22],{"class":67},[40,2135,168],{"class":70},[40,2137,265],{"class":74},[40,2139,210],{"class":70},[40,2141,270],{"class":74},[40,2143,210],{"class":70},[40,2145,275],{"class":74},[40,2147,312],{"class":70},[40,2149,2150,2153,2155],{"class":42,"line":141},[40,2151,2152],{"class":70},"  .",[40,2154,280],{"class":67},[40,2156,283],{"class":70},[40,2158,2159,2162,2164,2166,2168,2170,2172,2174,2177],{"class":42,"line":344},[40,2160,2161],{"class":67},"    tap",[40,2163,168],{"class":70},[40,2165,494],{"class":181},[40,2167,186],{"class":185},[40,2169,189],{"class":70},[40,2171,192],{"class":67},[40,2173,168],{"class":70},[40,2175,2176],{"class":374},"'Before map:'",[40,2178,2179],{"class":70},", value)),\n",[40,2181,2182,2184,2186,2188,2190,2192,2194,2197],{"class":42,"line":852},[40,2183,288],{"class":67},[40,2185,168],{"class":70},[40,2187,293],{"class":181},[40,2189,186],{"class":185},[40,2191,1037],{"class":70},[40,2193,301],{"class":185},[40,2195,2196],{"class":74}," 10",[40,2198,2199],{"class":70},"),\n",[40,2201,2202,2204,2206,2208,2210,2212,2214,2216,2219],{"class":42,"line":858},[40,2203,2161],{"class":67},[40,2205,168],{"class":70},[40,2207,494],{"class":181},[40,2209,186],{"class":185},[40,2211,189],{"class":70},[40,2213,192],{"class":67},[40,2215,168],{"class":70},[40,2217,2218],{"class":374},"'After map:'",[40,2220,2221],{"class":70},", value))\n",[40,2223,2224],{"class":42,"line":863},[40,2225,2226],{"class":70},"  )\n",[40,2228,2229,2231,2233],{"class":42,"line":871},[40,2230,2152],{"class":70},[40,2232,92],{"class":67},[40,2234,883],{"class":70},[524,2236,2237,2240,2243,2246,2249,2252],{},[527,2238,2239],{},"Before map: 1",[527,2241,2242],{},"After map: 10",[527,2244,2245],{},"Before map: 2",[527,2247,2248],{},"After map: 20",[527,2250,2251],{},"Before map: 3",[527,2253,2254],{},"After map: 30",[242,2256,2258,2259],{"id":2257},"_242-delay","2.4.2 ",[20,2260,2261],{},"delay",[25,2263,2264],{},"delay(dueTime): Delays the emission of values from the source Observable by a specified dueTime.",[31,2266,2268],{"className":767,"code":2267,"language":769,"meta":36,"style":36},"import { of } from 'rxjs';\nimport { delay } from 'rxjs\u002Foperators';\nof(1, 2).pipe(\n  delay(1000)\n).subscribe(val => console.log(val)); \u002F\u002F Emits 1 after 1s, then 2 after 1s from when it was scheduled\n\n",[20,2269,2270,2282,2295,2313,2324],{"__ignoreMap":36},[40,2271,2272,2274,2276,2278,2280],{"class":42,"line":43},[40,2273,1257],{"class":185},[40,2275,1260],{"class":70},[40,2277,52],{"class":185},[40,2279,1265],{"class":374},[40,2281,1268],{"class":70},[40,2283,2284,2286,2289,2291,2293],{"class":42,"line":122},[40,2285,1257],{"class":185},[40,2287,2288],{"class":70}," { delay } ",[40,2290,52],{"class":185},[40,2292,1280],{"class":374},[40,2294,1268],{"class":70},[40,2296,2297,2299,2301,2303,2305,2307,2309,2311],{"class":42,"line":129},[40,2298,22],{"class":67},[40,2300,168],{"class":70},[40,2302,265],{"class":74},[40,2304,210],{"class":70},[40,2306,270],{"class":74},[40,2308,174],{"class":70},[40,2310,280],{"class":67},[40,2312,283],{"class":70},[40,2314,2315,2318,2320,2322],{"class":42,"line":135},[40,2316,2317],{"class":67},"  delay",[40,2319,168],{"class":70},[40,2321,207],{"class":74},[40,2323,312],{"class":70},[40,2325,2326,2328,2330,2332,2334,2336,2338,2340,2342],{"class":42,"line":141},[40,2327,174],{"class":70},[40,2329,92],{"class":67},[40,2331,168],{"class":70},[40,2333,182],{"class":181},[40,2335,186],{"class":185},[40,2337,189],{"class":70},[40,2339,192],{"class":67},[40,2341,195],{"class":70},[40,2343,2344],{"class":98},"\u002F\u002F Emits 1 after 1s, then 2 after 1s from when it was scheduled\n",[15,2346,2348],{"id":2347},"_25-error-handling-operators","2.5 Error Handling Operators",[242,2350,2352,2353],{"id":2351},"_251-catcherrorselector","2.5.1 ",[20,2354,2355],{},"catchError(selector)",[25,2357,2358],{},"Catches errors on the source Observable and returns a new Observable, or throws an error",[31,2360,2362],{"className":767,"code":2361,"language":769,"meta":36,"style":36},"import { of, throwError } from 'rxjs';\nimport { map, catchError } from 'rxjs\u002Foperators';\nof(1, 2, 3).pipe(\n  map(val => {\n    if (val === 2) throw 'Error at 2';\n    return val;\n  }),\n  catchError(err => {\n    console.error('Caught error:', err);\n    return of(0); \u002F\u002F Recover with a default value\n  })\n).subscribe(val => console.log(val)); \u002F\u002F 1, Caught error: Error at 2, 0\n",[20,2363,2364,2377,2390,2412,2425,2448,2456,2461,2475,2490,2506,2511],{"__ignoreMap":36},[40,2365,2366,2368,2371,2373,2375],{"class":42,"line":43},[40,2367,1257],{"class":185},[40,2369,2370],{"class":70}," { of, throwError } ",[40,2372,52],{"class":185},[40,2374,1265],{"class":374},[40,2376,1268],{"class":70},[40,2378,2379,2381,2384,2386,2388],{"class":42,"line":122},[40,2380,1257],{"class":185},[40,2382,2383],{"class":70}," { map, catchError } ",[40,2385,52],{"class":185},[40,2387,1280],{"class":374},[40,2389,1268],{"class":70},[40,2391,2392,2394,2396,2398,2400,2402,2404,2406,2408,2410],{"class":42,"line":129},[40,2393,22],{"class":67},[40,2395,168],{"class":70},[40,2397,265],{"class":74},[40,2399,210],{"class":70},[40,2401,270],{"class":74},[40,2403,210],{"class":70},[40,2405,275],{"class":74},[40,2407,174],{"class":70},[40,2409,280],{"class":67},[40,2411,283],{"class":70},[40,2413,2414,2417,2419,2421,2423],{"class":42,"line":135},[40,2415,2416],{"class":67},"  map",[40,2418,168],{"class":70},[40,2420,182],{"class":181},[40,2422,186],{"class":185},[40,2424,328],{"class":70},[40,2426,2427,2430,2433,2435,2438,2440,2443,2446],{"class":42,"line":141},[40,2428,2429],{"class":185},"    if",[40,2431,2432],{"class":70}," (val ",[40,2434,1040],{"class":185},[40,2436,2437],{"class":74}," 2",[40,2439,497],{"class":70},[40,2441,2442],{"class":185},"throw",[40,2444,2445],{"class":374}," 'Error at 2'",[40,2447,1268],{"class":70},[40,2449,2450,2453],{"class":42,"line":344},[40,2451,2452],{"class":185},"    return",[40,2454,2455],{"class":70}," val;\n",[40,2457,2458],{"class":42,"line":852},[40,2459,2460],{"class":70},"  }),\n",[40,2462,2463,2466,2468,2471,2473],{"class":42,"line":858},[40,2464,2465],{"class":67},"  catchError",[40,2467,168],{"class":70},[40,2469,2470],{"class":181},"err",[40,2472,186],{"class":185},[40,2474,328],{"class":70},[40,2476,2477,2479,2482,2484,2487],{"class":42,"line":863},[40,2478,333],{"class":70},[40,2480,2481],{"class":67},"error",[40,2483,168],{"class":70},[40,2485,2486],{"class":374},"'Caught error:'",[40,2488,2489],{"class":70},", err);\n",[40,2491,2492,2494,2496,2498,2500,2503],{"class":42,"line":871},[40,2493,2452],{"class":185},[40,2495,1492],{"class":67},[40,2497,168],{"class":70},[40,2499,511],{"class":74},[40,2501,2502],{"class":70},"); ",[40,2504,2505],{"class":98},"\u002F\u002F Recover with a default value\n",[40,2507,2508],{"class":42,"line":886},[40,2509,2510],{"class":70},"  })\n",[40,2512,2513,2515,2517,2519,2521,2523,2525,2527,2529],{"class":42,"line":898},[40,2514,174],{"class":70},[40,2516,92],{"class":67},[40,2518,168],{"class":70},[40,2520,182],{"class":181},[40,2522,186],{"class":185},[40,2524,189],{"class":70},[40,2526,192],{"class":67},[40,2528,195],{"class":70},[40,2530,2531],{"class":98},"\u002F\u002F 1, Caught error: Error at 2, 0\n",[10,2533,2535],{"id":2534},"_3-higher-order-mapping-operators-flattening-operators","3. Higher-Order Mapping Operators (Flattening Operators)",[15,2537,2539],{"id":2538},"_31-switchmap","3.1 switchMap",[15,2541,2543],{"id":2542},"_32-concatmap","3.2 concatMap",[15,2545,2547],{"id":2546},"_33-mergemap","3.3 mergeMap",[15,2549,2551],{"id":2550},"_34-exhaustmap","3.4 exhaustMap",[10,2553,2555],{"id":2554},"_4-subjects","4. Subjects",[25,2557,2558],{},"A Subject in RxJS is a special type of Observable that allows values to be multicasted to many Observers. In simpler terms, a Subject is both:",[524,2560,2561,2564],{},[527,2562,2563],{},"an Observable (you can subscribe() to it)",[527,2565,2566],{},"an Observer (you can send values to it with next())",[15,2568,2570],{"id":2569},"understand-the-difference-between-unicast-and-multicast","Understand the difference between unicast and multicast",[25,2572,2573],{},"Analogy",[524,2575,2576,2579],{},[527,2577,2578],{},"Unicast = Everyone cooks their own meal from scratch.",[527,2580,2581],{},"Multicast = One meal is cooked and shared with everyone.",[25,2583,2584],{},[2585,2586,2587],"strong",{},"🔁 Observable restarts its producer logic for each subscriber → Unicast",[31,2589,2591],{"className":767,"code":2590,"language":769,"meta":36,"style":36},"import { Observable } from 'rxjs';\n\nconst obs$ = new Observable(subscriber => {\n console.log('Observable started');\n subscriber.next(Math.random()); \u002F\u002F emits a new random number for each subscriber\n});\n\nobs$.subscribe(val => console.log('Subscriber A:', val));\nobs$.subscribe(val => console.log('Subscriber B:', val));\n\n\u002F*\nObservable started\nSubscriber A: 0.5824...\n\nObservable started\nSubscriber B: 0.9328...\n*\u002F\n",[20,2592,2593,2606,2610,2633,2646,2665,2669,2673,2698,2721,2725,2730,2735,2741,2746,2751,2757],{"__ignoreMap":36},[40,2594,2595,2597,2600,2602,2604],{"class":42,"line":43},[40,2596,1257],{"class":185},[40,2598,2599],{"class":70}," { Observable } ",[40,2601,52],{"class":185},[40,2603,1265],{"class":374},[40,2605,1268],{"class":70},[40,2607,2608],{"class":42,"line":122},[40,2609,126],{"emptyLinePlaceholder":125},[40,2611,2612,2614,2617,2619,2621,2624,2626,2629,2631],{"class":42,"line":129},[40,2613,1483],{"class":185},[40,2615,2616],{"class":74}," obs$",[40,2618,1489],{"class":185},[40,2620,782],{"class":185},[40,2622,2623],{"class":67}," Observable",[40,2625,168],{"class":70},[40,2627,2628],{"class":181},"subscriber",[40,2630,186],{"class":185},[40,2632,328],{"class":70},[40,2634,2635,2637,2639,2641,2644],{"class":42,"line":135},[40,2636,189],{"class":70},[40,2638,192],{"class":67},[40,2640,168],{"class":70},[40,2642,2643],{"class":374},"'Observable started'",[40,2645,1509],{"class":70},[40,2647,2648,2651,2653,2656,2659,2662],{"class":42,"line":141},[40,2649,2650],{"class":70}," subscriber.",[40,2652,880],{"class":67},[40,2654,2655],{"class":70},"(Math.",[40,2657,2658],{"class":67},"random",[40,2660,2661],{"class":70},"()); ",[40,2663,2664],{"class":98},"\u002F\u002F emits a new random number for each subscriber\n",[40,2666,2667],{"class":42,"line":344},[40,2668,144],{"class":70},[40,2670,2671],{"class":42,"line":852},[40,2672,126],{"emptyLinePlaceholder":125},[40,2674,2675,2678,2680,2682,2684,2686,2688,2690,2692,2695],{"class":42,"line":858},[40,2676,2677],{"class":70},"obs$.",[40,2679,92],{"class":67},[40,2681,168],{"class":70},[40,2683,182],{"class":181},[40,2685,186],{"class":185},[40,2687,189],{"class":70},[40,2689,192],{"class":67},[40,2691,168],{"class":70},[40,2693,2694],{"class":374},"'Subscriber A:'",[40,2696,2697],{"class":70},", val));\n",[40,2699,2700,2702,2704,2706,2708,2710,2712,2714,2716,2719],{"class":42,"line":863},[40,2701,2677],{"class":70},[40,2703,92],{"class":67},[40,2705,168],{"class":70},[40,2707,182],{"class":181},[40,2709,186],{"class":185},[40,2711,189],{"class":70},[40,2713,192],{"class":67},[40,2715,168],{"class":70},[40,2717,2718],{"class":374},"'Subscriber B:'",[40,2720,2697],{"class":70},[40,2722,2723],{"class":42,"line":871},[40,2724,126],{"emptyLinePlaceholder":125},[40,2726,2727],{"class":42,"line":886},[40,2728,2729],{"class":98},"\u002F*\n",[40,2731,2732],{"class":42,"line":898},[40,2733,2734],{"class":98},"Observable started\n",[40,2736,2738],{"class":42,"line":2737},13,[40,2739,2740],{"class":98},"Subscriber A: 0.5824...\n",[40,2742,2744],{"class":42,"line":2743},14,[40,2745,126],{"emptyLinePlaceholder":125},[40,2747,2749],{"class":42,"line":2748},15,[40,2750,2734],{"class":98},[40,2752,2754],{"class":42,"line":2753},16,[40,2755,2756],{"class":98},"Subscriber B: 0.9328...\n",[40,2758,2760],{"class":42,"line":2759},17,[40,2761,2762],{"class":98},"*\u002F\n",[25,2764,2765],{},[2585,2766,2767],{},"Multicast Example – Using a Subject",[25,2769,2770],{},"🎯 Subject shares the same value with all subscribers → Multicast",[31,2772,2774],{"className":767,"code":2773,"language":769,"meta":36,"style":36},"import { Subject } from 'rxjs';\n\nconst subject$ = new Subject\u003Cnumber>();\n\n\u002F\u002F same random value is pushed once\nsubject$.subscribe(val => console.log('Subscriber A:', val));\nsubject$.subscribe(val => console.log('Subscriber B:', val));\n\nsubject$.next(Math.random());\n\n\u002F*\nSubscriber A: 0.7352...\nSubscriber B: 0.7352...\n*\u002F\n",[20,2775,2776,2789,2793,2813,2817,2822,2845,2867,2871,2884,2888,2892,2897,2902],{"__ignoreMap":36},[40,2777,2778,2780,2783,2785,2787],{"class":42,"line":43},[40,2779,1257],{"class":185},[40,2781,2782],{"class":70}," { Subject } ",[40,2784,52],{"class":185},[40,2786,1265],{"class":374},[40,2788,1268],{"class":70},[40,2790,2791],{"class":42,"line":122},[40,2792,126],{"emptyLinePlaceholder":125},[40,2794,2795,2797,2800,2802,2804,2806,2808,2811],{"class":42,"line":129},[40,2796,1483],{"class":185},[40,2798,2799],{"class":74}," subject$",[40,2801,1489],{"class":185},[40,2803,782],{"class":185},[40,2805,785],{"class":67},[40,2807,788],{"class":70},[40,2809,2810],{"class":74},"number",[40,2812,794],{"class":70},[40,2814,2815],{"class":42,"line":135},[40,2816,126],{"emptyLinePlaceholder":125},[40,2818,2819],{"class":42,"line":141},[40,2820,2821],{"class":98},"\u002F\u002F same random value is pushed once\n",[40,2823,2824,2827,2829,2831,2833,2835,2837,2839,2841,2843],{"class":42,"line":344},[40,2825,2826],{"class":70},"subject$.",[40,2828,92],{"class":67},[40,2830,168],{"class":70},[40,2832,182],{"class":181},[40,2834,186],{"class":185},[40,2836,189],{"class":70},[40,2838,192],{"class":67},[40,2840,168],{"class":70},[40,2842,2694],{"class":374},[40,2844,2697],{"class":70},[40,2846,2847,2849,2851,2853,2855,2857,2859,2861,2863,2865],{"class":42,"line":852},[40,2848,2826],{"class":70},[40,2850,92],{"class":67},[40,2852,168],{"class":70},[40,2854,182],{"class":181},[40,2856,186],{"class":185},[40,2858,189],{"class":70},[40,2860,192],{"class":67},[40,2862,168],{"class":70},[40,2864,2718],{"class":374},[40,2866,2697],{"class":70},[40,2868,2869],{"class":42,"line":858},[40,2870,126],{"emptyLinePlaceholder":125},[40,2872,2873,2875,2877,2879,2881],{"class":42,"line":863},[40,2874,2826],{"class":70},[40,2876,880],{"class":67},[40,2878,2655],{"class":70},[40,2880,2658],{"class":67},[40,2882,2883],{"class":70},"());\n",[40,2885,2886],{"class":42,"line":871},[40,2887,126],{"emptyLinePlaceholder":125},[40,2889,2890],{"class":42,"line":886},[40,2891,2729],{"class":98},[40,2893,2894],{"class":42,"line":898},[40,2895,2896],{"class":98},"Subscriber A: 0.7352...\n",[40,2898,2899],{"class":42,"line":2737},[40,2900,2901],{"class":98},"Subscriber B: 0.7352...\n",[40,2903,2904],{"class":42,"line":2743},[40,2905,2762],{"class":98},[15,2907,2909,2912,2913],{"id":2908},"subject-vs-behaviorsubject",[20,2910,2911],{},"Subject"," vs ",[20,2914,2915],{},"BehaviorSubject",[2917,2918,2919,2937],"table",{},[2920,2921,2922],"thead",{},[2923,2924,2925,2929,2933],"tr",{},[2926,2927,2928],"th",{},"Feature",[2926,2930,2931],{},[20,2932,2911],{},[2926,2934,2935],{},[20,2936,2915],{},[2938,2939,2940,2952,2962,2971],"tbody",{},[2923,2941,2942,2946,2949],{},[2943,2944,2945],"td",{},"Stores latest value?",[2943,2947,2948],{},"❌ No",[2943,2950,2951],{},"✅ Yes",[2923,2953,2954,2957,2959],{},[2943,2955,2956],{},"Emits last value to new subscribers?",[2943,2958,2948],{},[2943,2960,2961],{},"✅ Yes (immediately upon subscribe)",[2923,2963,2964,2967,2969],{},[2943,2965,2966],{},"Requires initial value?",[2943,2968,2948],{},[2943,2970,2951],{},[2923,2972,2973,2976,2979],{},[2943,2974,2975],{},"Typical Use Case",[2943,2977,2978],{},"Events, commands",[2943,2980,2981],{},"State, form values, caching, auth status",[524,2983,2984,2987],{},[527,2985,2986],{},"Subject has no memory, any subscribers will only get the value once it is emitted",[527,2988,2989],{},"SubjectBehavior maintain the last value and require an initial value upon intialization, once a subscriber subscribe to it, it will get the last value automatically",[15,2991,2993,2994],{"id":2992},"example-of-subject","Example of ",[20,2995,2911],{},[31,2997,2999],{"className":767,"code":2998,"language":769,"meta":36,"style":36},"import { Subject } from 'rxjs';\n\nconst subject = new Subject\u003Cnumber>();\n\nsubject.subscribe(val => console.log('A:', val));\n\nsubject.next(1); \u002F\u002F A: 1\nsubject.next(2); \u002F\u002F A: 2\n\nsubject.subscribe(val => console.log('B:', val)); \u002F\u002F 👈 Subscribes later\n\nsubject.next(3); \u002F\u002F A: 3, B: 3\n\n\u002F*\nA: 1\nA: 2\nA: 3\nB: 3\n*\u002F\n",[20,3000,3001,3013,3017,3036,3040,3064,3068,3083,3098,3102,3129,3133,3148,3152,3156,3161,3166,3171,3177],{"__ignoreMap":36},[40,3002,3003,3005,3007,3009,3011],{"class":42,"line":43},[40,3004,1257],{"class":185},[40,3006,2782],{"class":70},[40,3008,52],{"class":185},[40,3010,1265],{"class":374},[40,3012,1268],{"class":70},[40,3014,3015],{"class":42,"line":122},[40,3016,126],{"emptyLinePlaceholder":125},[40,3018,3019,3021,3024,3026,3028,3030,3032,3034],{"class":42,"line":129},[40,3020,1483],{"class":185},[40,3022,3023],{"class":74}," subject",[40,3025,1489],{"class":185},[40,3027,782],{"class":185},[40,3029,785],{"class":67},[40,3031,788],{"class":70},[40,3033,2810],{"class":74},[40,3035,794],{"class":70},[40,3037,3038],{"class":42,"line":135},[40,3039,126],{"emptyLinePlaceholder":125},[40,3041,3042,3045,3047,3049,3051,3053,3055,3057,3059,3062],{"class":42,"line":141},[40,3043,3044],{"class":70},"subject.",[40,3046,92],{"class":67},[40,3048,168],{"class":70},[40,3050,182],{"class":181},[40,3052,186],{"class":185},[40,3054,189],{"class":70},[40,3056,192],{"class":67},[40,3058,168],{"class":70},[40,3060,3061],{"class":374},"'A:'",[40,3063,2697],{"class":70},[40,3065,3066],{"class":42,"line":344},[40,3067,126],{"emptyLinePlaceholder":125},[40,3069,3070,3072,3074,3076,3078,3080],{"class":42,"line":852},[40,3071,3044],{"class":70},[40,3073,880],{"class":67},[40,3075,168],{"class":70},[40,3077,265],{"class":74},[40,3079,2502],{"class":70},[40,3081,3082],{"class":98},"\u002F\u002F A: 1\n",[40,3084,3085,3087,3089,3091,3093,3095],{"class":42,"line":858},[40,3086,3044],{"class":70},[40,3088,880],{"class":67},[40,3090,168],{"class":70},[40,3092,270],{"class":74},[40,3094,2502],{"class":70},[40,3096,3097],{"class":98},"\u002F\u002F A: 2\n",[40,3099,3100],{"class":42,"line":863},[40,3101,126],{"emptyLinePlaceholder":125},[40,3103,3104,3106,3108,3110,3112,3114,3116,3118,3120,3123,3126],{"class":42,"line":871},[40,3105,3044],{"class":70},[40,3107,92],{"class":67},[40,3109,168],{"class":70},[40,3111,182],{"class":181},[40,3113,186],{"class":185},[40,3115,189],{"class":70},[40,3117,192],{"class":67},[40,3119,168],{"class":70},[40,3121,3122],{"class":374},"'B:'",[40,3124,3125],{"class":70},", val)); ",[40,3127,3128],{"class":98},"\u002F\u002F 👈 Subscribes later\n",[40,3130,3131],{"class":42,"line":886},[40,3132,126],{"emptyLinePlaceholder":125},[40,3134,3135,3137,3139,3141,3143,3145],{"class":42,"line":898},[40,3136,3044],{"class":70},[40,3138,880],{"class":67},[40,3140,168],{"class":70},[40,3142,275],{"class":74},[40,3144,2502],{"class":70},[40,3146,3147],{"class":98},"\u002F\u002F A: 3, B: 3\n",[40,3149,3150],{"class":42,"line":2737},[40,3151,126],{"emptyLinePlaceholder":125},[40,3153,3154],{"class":42,"line":2743},[40,3155,2729],{"class":98},[40,3157,3158],{"class":42,"line":2748},[40,3159,3160],{"class":98},"A: 1\n",[40,3162,3163],{"class":42,"line":2753},[40,3164,3165],{"class":98},"A: 2\n",[40,3167,3168],{"class":42,"line":2759},[40,3169,3170],{"class":98},"A: 3\n",[40,3172,3174],{"class":42,"line":3173},18,[40,3175,3176],{"class":98},"B: 3\n",[40,3178,3180],{"class":42,"line":3179},19,[40,3181,2762],{"class":98},[15,3183,2993,3185],{"id":3184},"example-of-behaviorsubject",[20,3186,2915],{},[31,3188,3190],{"className":767,"code":3189,"language":769,"meta":36,"style":36},"import { BehaviorSubject } from 'rxjs';\n\nconst behavior = new BehaviorSubject\u003Cnumber>(0); \u002F\u002F 👈 Must have an initial value\n\nbehavior.subscribe(val => console.log('A:', val));\n\nbehavior.next(1); \u002F\u002F A: 1\nbehavior.next(2); \u002F\u002F A: 2\n\nbehavior.subscribe(val => console.log('B:', val)); \u002F\u002F 👈 Subscribes later\n\nbehavior.next(3); \u002F\u002F A: 3, B: 3\n\n\u002F*\nA: 0\nA: 1\nA: 2\nB: 2\nA: 3\nB: 3\n*\u002F\n",[20,3191,3192,3205,3209,3237,3241,3264,3268,3282,3296,3300,3324,3328,3342,3346,3350,3355,3359,3363,3368,3372,3377],{"__ignoreMap":36},[40,3193,3194,3196,3199,3201,3203],{"class":42,"line":43},[40,3195,1257],{"class":185},[40,3197,3198],{"class":70}," { BehaviorSubject } ",[40,3200,52],{"class":185},[40,3202,1265],{"class":374},[40,3204,1268],{"class":70},[40,3206,3207],{"class":42,"line":122},[40,3208,126],{"emptyLinePlaceholder":125},[40,3210,3211,3213,3216,3218,3220,3223,3225,3227,3230,3232,3234],{"class":42,"line":129},[40,3212,1483],{"class":185},[40,3214,3215],{"class":74}," behavior",[40,3217,1489],{"class":185},[40,3219,782],{"class":185},[40,3221,3222],{"class":67}," BehaviorSubject",[40,3224,788],{"class":70},[40,3226,2810],{"class":74},[40,3228,3229],{"class":70},">(",[40,3231,511],{"class":74},[40,3233,2502],{"class":70},[40,3235,3236],{"class":98},"\u002F\u002F 👈 Must have an initial value\n",[40,3238,3239],{"class":42,"line":135},[40,3240,126],{"emptyLinePlaceholder":125},[40,3242,3243,3246,3248,3250,3252,3254,3256,3258,3260,3262],{"class":42,"line":141},[40,3244,3245],{"class":70},"behavior.",[40,3247,92],{"class":67},[40,3249,168],{"class":70},[40,3251,182],{"class":181},[40,3253,186],{"class":185},[40,3255,189],{"class":70},[40,3257,192],{"class":67},[40,3259,168],{"class":70},[40,3261,3061],{"class":374},[40,3263,2697],{"class":70},[40,3265,3266],{"class":42,"line":344},[40,3267,126],{"emptyLinePlaceholder":125},[40,3269,3270,3272,3274,3276,3278,3280],{"class":42,"line":852},[40,3271,3245],{"class":70},[40,3273,880],{"class":67},[40,3275,168],{"class":70},[40,3277,265],{"class":74},[40,3279,2502],{"class":70},[40,3281,3082],{"class":98},[40,3283,3284,3286,3288,3290,3292,3294],{"class":42,"line":858},[40,3285,3245],{"class":70},[40,3287,880],{"class":67},[40,3289,168],{"class":70},[40,3291,270],{"class":74},[40,3293,2502],{"class":70},[40,3295,3097],{"class":98},[40,3297,3298],{"class":42,"line":863},[40,3299,126],{"emptyLinePlaceholder":125},[40,3301,3302,3304,3306,3308,3310,3312,3314,3316,3318,3320,3322],{"class":42,"line":871},[40,3303,3245],{"class":70},[40,3305,92],{"class":67},[40,3307,168],{"class":70},[40,3309,182],{"class":181},[40,3311,186],{"class":185},[40,3313,189],{"class":70},[40,3315,192],{"class":67},[40,3317,168],{"class":70},[40,3319,3122],{"class":374},[40,3321,3125],{"class":70},[40,3323,3128],{"class":98},[40,3325,3326],{"class":42,"line":886},[40,3327,126],{"emptyLinePlaceholder":125},[40,3329,3330,3332,3334,3336,3338,3340],{"class":42,"line":898},[40,3331,3245],{"class":70},[40,3333,880],{"class":67},[40,3335,168],{"class":70},[40,3337,275],{"class":74},[40,3339,2502],{"class":70},[40,3341,3147],{"class":98},[40,3343,3344],{"class":42,"line":2737},[40,3345,126],{"emptyLinePlaceholder":125},[40,3347,3348],{"class":42,"line":2743},[40,3349,2729],{"class":98},[40,3351,3352],{"class":42,"line":2748},[40,3353,3354],{"class":98},"A: 0\n",[40,3356,3357],{"class":42,"line":2753},[40,3358,3160],{"class":98},[40,3360,3361],{"class":42,"line":2759},[40,3362,3165],{"class":98},[40,3364,3365],{"class":42,"line":3173},[40,3366,3367],{"class":98},"B: 2\n",[40,3369,3370],{"class":42,"line":3179},[40,3371,3170],{"class":98},[40,3373,3375],{"class":42,"line":3374},20,[40,3376,3176],{"class":98},[40,3378,3380],{"class":42,"line":3379},21,[40,3381,2762],{"class":98},[15,3383,3385,2912,3388],{"id":3384},"replaysubject-vs-asyncbehavior",[20,3386,3387],{},"ReplaySubject",[20,3389,3390],{},"AsyncBehavior",[2917,3392,3393,3408],{},[2920,3394,3395],{},[2923,3396,3397,3399,3403],{},[2926,3398,2928],{},[2926,3400,3401],{},[20,3402,3387],{},[2926,3404,3405],{},[20,3406,3407],{},"AsyncSubject",[2938,3409,3410,3431,3447,3462],{},[2923,3411,3412,3417,3420],{},[2943,3413,3414],{},[2585,3415,3416],{},"Purpose",[2943,3418,3419],{},"Replays previous values to new subscribers",[2943,3421,3422,3423,3426,3427],{},"Emits ",[2585,3424,3425],{},"only the last value"," ",[3428,3429,3430],"em",{},"on completion",[2923,3432,3433,3438,3441],{},[2943,3434,3435],{},[2585,3436,3437],{},"Stores history",[2943,3439,3440],{},"✅ Yes (you define how many values)",[2943,3442,3443,3444,3446],{},"❌ Only remembers the ",[2585,3445,1078],{}," value",[2923,3448,3449,3454,3456],{},[2943,3450,3451],{},[2585,3452,3453],{},"Emits immediately to new subscribers",[2943,3455,2951],{},[2943,3457,3458,3459],{},"❌ Only on ",[20,3460,3461],{},".complete()",[2923,3463,3464,3469,3472],{},[2943,3465,3466],{},[2585,3467,3468],{},"Common Use Case",[2943,3470,3471],{},"Caching event history, chat logs",[2943,3473,3474],{},"HTTP final response, \"done\" signals",[15,3476,2993,3478],{"id":3477},"example-of-replaysubject",[20,3479,3387],{},[31,3481,3483],{"className":767,"code":3482,"language":769,"meta":36,"style":36},"import { ReplaySubject } from 'rxjs';\n\nconst replay$ = new ReplaySubject\u003Cnumber>(2); \u002F\u002F Keep last 2 values\n\nreplay$.next(1);\nreplay$.next(2);\nreplay$.next(3);\n\nreplay$.subscribe(val => console.log('Subscriber A:', val));\n\nreplay$.next(4);\n\n\u002F*\nSubscriber A: 2\nSubscriber A: 3\nSubscriber A: 4\n*\u002F\n",[20,3484,3485,3498,3502,3529,3533,3546,3558,3570,3574,3596,3600,3612,3616,3620,3625,3630,3635],{"__ignoreMap":36},[40,3486,3487,3489,3492,3494,3496],{"class":42,"line":43},[40,3488,1257],{"class":185},[40,3490,3491],{"class":70}," { ReplaySubject } ",[40,3493,52],{"class":185},[40,3495,1265],{"class":374},[40,3497,1268],{"class":70},[40,3499,3500],{"class":42,"line":122},[40,3501,126],{"emptyLinePlaceholder":125},[40,3503,3504,3506,3509,3511,3513,3516,3518,3520,3522,3524,3526],{"class":42,"line":129},[40,3505,1483],{"class":185},[40,3507,3508],{"class":74}," replay$",[40,3510,1489],{"class":185},[40,3512,782],{"class":185},[40,3514,3515],{"class":67}," ReplaySubject",[40,3517,788],{"class":70},[40,3519,2810],{"class":74},[40,3521,3229],{"class":70},[40,3523,270],{"class":74},[40,3525,2502],{"class":70},[40,3527,3528],{"class":98},"\u002F\u002F Keep last 2 values\n",[40,3530,3531],{"class":42,"line":135},[40,3532,126],{"emptyLinePlaceholder":125},[40,3534,3535,3538,3540,3542,3544],{"class":42,"line":141},[40,3536,3537],{"class":70},"replay$.",[40,3539,880],{"class":67},[40,3541,168],{"class":70},[40,3543,265],{"class":74},[40,3545,1509],{"class":70},[40,3547,3548,3550,3552,3554,3556],{"class":42,"line":344},[40,3549,3537],{"class":70},[40,3551,880],{"class":67},[40,3553,168],{"class":70},[40,3555,270],{"class":74},[40,3557,1509],{"class":70},[40,3559,3560,3562,3564,3566,3568],{"class":42,"line":852},[40,3561,3537],{"class":70},[40,3563,880],{"class":67},[40,3565,168],{"class":70},[40,3567,275],{"class":74},[40,3569,1509],{"class":70},[40,3571,3572],{"class":42,"line":858},[40,3573,126],{"emptyLinePlaceholder":125},[40,3575,3576,3578,3580,3582,3584,3586,3588,3590,3592,3594],{"class":42,"line":863},[40,3577,3537],{"class":70},[40,3579,92],{"class":67},[40,3581,168],{"class":70},[40,3583,182],{"class":181},[40,3585,186],{"class":185},[40,3587,189],{"class":70},[40,3589,192],{"class":67},[40,3591,168],{"class":70},[40,3593,2694],{"class":374},[40,3595,2697],{"class":70},[40,3597,3598],{"class":42,"line":871},[40,3599,126],{"emptyLinePlaceholder":125},[40,3601,3602,3604,3606,3608,3610],{"class":42,"line":886},[40,3603,3537],{"class":70},[40,3605,880],{"class":67},[40,3607,168],{"class":70},[40,3609,75],{"class":74},[40,3611,1509],{"class":70},[40,3613,3614],{"class":42,"line":898},[40,3615,126],{"emptyLinePlaceholder":125},[40,3617,3618],{"class":42,"line":2737},[40,3619,2729],{"class":98},[40,3621,3622],{"class":42,"line":2743},[40,3623,3624],{"class":98},"Subscriber A: 2\n",[40,3626,3627],{"class":42,"line":2748},[40,3628,3629],{"class":98},"Subscriber A: 3\n",[40,3631,3632],{"class":42,"line":2753},[40,3633,3634],{"class":98},"Subscriber A: 4\n",[40,3636,3637],{"class":42,"line":2759},[40,3638,2762],{"class":98},[15,3640,2993,3642],{"id":3641},"example-of-asyncsubject",[20,3643,3407],{},[25,3645,3646],{},"Only emit the value once it is completed",[31,3648,3650],{"className":767,"code":3649,"language":769,"meta":36,"style":36},"import { AsyncSubject } from 'rxjs';\n\nconst async$ = new AsyncSubject\u003Cnumber>();\n\nasync$.next(1);\nasync$.next(2);\nasync$.next(3);\n\nasync$.subscribe(val => console.log('Subscriber A:', val));\n\nasync$.next(4);\n\nasync$.complete(); \u002F\u002F 👈 Only now will it emit the last value\n\n\u002F*\nSubscriber A: 4\n*\u002F\n",[20,3651,3652,3665,3669,3689,3693,3706,3718,3730,3734,3756,3760,3772,3776,3788,3792,3796,3800],{"__ignoreMap":36},[40,3653,3654,3656,3659,3661,3663],{"class":42,"line":43},[40,3655,1257],{"class":185},[40,3657,3658],{"class":70}," { AsyncSubject } ",[40,3660,52],{"class":185},[40,3662,1265],{"class":374},[40,3664,1268],{"class":70},[40,3666,3667],{"class":42,"line":122},[40,3668,126],{"emptyLinePlaceholder":125},[40,3670,3671,3673,3676,3678,3680,3683,3685,3687],{"class":42,"line":129},[40,3672,1483],{"class":185},[40,3674,3675],{"class":74}," async$",[40,3677,1489],{"class":185},[40,3679,782],{"class":185},[40,3681,3682],{"class":67}," AsyncSubject",[40,3684,788],{"class":70},[40,3686,2810],{"class":74},[40,3688,794],{"class":70},[40,3690,3691],{"class":42,"line":135},[40,3692,126],{"emptyLinePlaceholder":125},[40,3694,3695,3698,3700,3702,3704],{"class":42,"line":141},[40,3696,3697],{"class":70},"async$.",[40,3699,880],{"class":67},[40,3701,168],{"class":70},[40,3703,265],{"class":74},[40,3705,1509],{"class":70},[40,3707,3708,3710,3712,3714,3716],{"class":42,"line":344},[40,3709,3697],{"class":70},[40,3711,880],{"class":67},[40,3713,168],{"class":70},[40,3715,270],{"class":74},[40,3717,1509],{"class":70},[40,3719,3720,3722,3724,3726,3728],{"class":42,"line":852},[40,3721,3697],{"class":70},[40,3723,880],{"class":67},[40,3725,168],{"class":70},[40,3727,275],{"class":74},[40,3729,1509],{"class":70},[40,3731,3732],{"class":42,"line":858},[40,3733,126],{"emptyLinePlaceholder":125},[40,3735,3736,3738,3740,3742,3744,3746,3748,3750,3752,3754],{"class":42,"line":863},[40,3737,3697],{"class":70},[40,3739,92],{"class":67},[40,3741,168],{"class":70},[40,3743,182],{"class":181},[40,3745,186],{"class":185},[40,3747,189],{"class":70},[40,3749,192],{"class":67},[40,3751,168],{"class":70},[40,3753,2694],{"class":374},[40,3755,2697],{"class":70},[40,3757,3758],{"class":42,"line":871},[40,3759,126],{"emptyLinePlaceholder":125},[40,3761,3762,3764,3766,3768,3770],{"class":42,"line":886},[40,3763,3697],{"class":70},[40,3765,880],{"class":67},[40,3767,168],{"class":70},[40,3769,75],{"class":74},[40,3771,1509],{"class":70},[40,3773,3774],{"class":42,"line":898},[40,3775,126],{"emptyLinePlaceholder":125},[40,3777,3778,3780,3782,3785],{"class":42,"line":2737},[40,3779,3697],{"class":70},[40,3781,893],{"class":67},[40,3783,3784],{"class":70},"(); ",[40,3786,3787],{"class":98},"\u002F\u002F 👈 Only now will it emit the last value\n",[40,3789,3790],{"class":42,"line":2743},[40,3791,126],{"emptyLinePlaceholder":125},[40,3793,3794],{"class":42,"line":2748},[40,3795,2729],{"class":98},[40,3797,3798],{"class":42,"line":2753},[40,3799,3634],{"class":98},[40,3801,3802],{"class":42,"line":2759},[40,3803,2762],{"class":98},[10,3805,3807],{"id":3806},"_5-hot-vs-cold-observables","5. Hot vs Cold Observables",[25,3809,3810],{},"This distinction is about when and how the observable starts emitting values and who receives them.",[15,3812,3814],{"id":3813},"cold-observable","Cold Observable",[25,3816,3817],{},"A cold observable starts emitting values only when subscribed to. Each subscriber gets its own independent execution",[524,3819,3820,3823,3826],{},[527,3821,3822],{},"Values are generated per subscriber.",[527,3824,3825],{},"Ideal for unicast operations (like HTTP requests, setTimeout, interval, etc.).",[527,3827,3828],{},"Think of a Netflix movie: everyone gets their own stream from the beginning.",[31,3830,3832],{"className":157,"code":3831,"language":159,"meta":36,"style":36},"const cold$ = new Observable(observer => {\n  console.log(\"Observable started\");\n  observer.next(Math.random());\n});\n\ncold$.subscribe(val => console.log(\"Subscriber 1:\", val));\ncold$.subscribe(val => console.log(\"Subscriber 2:\", val));\n\n\u002F*\nObservable started\nSubscriber 1: 0.84\nObservable started\nSubscriber 2: 0.51\n*\u002F\n",[20,3833,3834,3856,3869,3882,3886,3890,3914,3937,3941,3945,3949,3954,3958,3963],{"__ignoreMap":36},[40,3835,3836,3838,3841,3843,3845,3847,3849,3852,3854],{"class":42,"line":43},[40,3837,1483],{"class":185},[40,3839,3840],{"class":74}," cold$",[40,3842,1489],{"class":185},[40,3844,782],{"class":185},[40,3846,2623],{"class":67},[40,3848,168],{"class":70},[40,3850,3851],{"class":181},"observer",[40,3853,186],{"class":185},[40,3855,328],{"class":70},[40,3857,3858,3860,3862,3864,3867],{"class":42,"line":122},[40,3859,1572],{"class":70},[40,3861,192],{"class":67},[40,3863,168],{"class":70},[40,3865,3866],{"class":374},"\"Observable started\"",[40,3868,1509],{"class":70},[40,3870,3871,3874,3876,3878,3880],{"class":42,"line":129},[40,3872,3873],{"class":70},"  observer.",[40,3875,880],{"class":67},[40,3877,2655],{"class":70},[40,3879,2658],{"class":67},[40,3881,2883],{"class":70},[40,3883,3884],{"class":42,"line":135},[40,3885,144],{"class":70},[40,3887,3888],{"class":42,"line":141},[40,3889,126],{"emptyLinePlaceholder":125},[40,3891,3892,3895,3897,3899,3901,3903,3905,3907,3909,3912],{"class":42,"line":344},[40,3893,3894],{"class":70},"cold$.",[40,3896,92],{"class":67},[40,3898,168],{"class":70},[40,3900,182],{"class":181},[40,3902,186],{"class":185},[40,3904,189],{"class":70},[40,3906,192],{"class":67},[40,3908,168],{"class":70},[40,3910,3911],{"class":374},"\"Subscriber 1:\"",[40,3913,2697],{"class":70},[40,3915,3916,3918,3920,3922,3924,3926,3928,3930,3932,3935],{"class":42,"line":852},[40,3917,3894],{"class":70},[40,3919,92],{"class":67},[40,3921,168],{"class":70},[40,3923,182],{"class":181},[40,3925,186],{"class":185},[40,3927,189],{"class":70},[40,3929,192],{"class":67},[40,3931,168],{"class":70},[40,3933,3934],{"class":374},"\"Subscriber 2:\"",[40,3936,2697],{"class":70},[40,3938,3939],{"class":42,"line":858},[40,3940,126],{"emptyLinePlaceholder":125},[40,3942,3943],{"class":42,"line":863},[40,3944,2729],{"class":98},[40,3946,3947],{"class":42,"line":871},[40,3948,2734],{"class":98},[40,3950,3951],{"class":42,"line":886},[40,3952,3953],{"class":98},"Subscriber 1: 0.84\n",[40,3955,3956],{"class":42,"line":898},[40,3957,2734],{"class":98},[40,3959,3960],{"class":42,"line":2737},[40,3961,3962],{"class":98},"Subscriber 2: 0.51\n",[40,3964,3965],{"class":42,"line":2743},[40,3966,2762],{"class":98},[15,3968,3970],{"id":3969},"hot-observable","Hot Observable",[25,3972,3973],{},"hot observable starts emitting values regardless of subscriptions. Subscribers share the same execution and get data from that point onward.",[25,3975,3976],{},"Characteristics:",[524,3978,3979,3982,3985],{},[527,3980,3981],{},"Values are shared across subscribers.",[527,3983,3984],{},"Ideal for multicast sources (like user clicks, WebSocket, live timer).",[527,3986,3987],{},"Think of a live YouTube stream: join late, you miss the beginning.",[31,3989,3991],{"className":767,"code":3990,"language":769,"meta":36,"style":36},"const subject = new Subject();\n\nsubject.subscribe(val => console.log(\"Subscriber 1:\", val));\nsubject.next(Math.random());\n\nsubject.subscribe(val => console.log(\"Subscriber 2:\", val));\nsubject.next(Math.random());\n\n\n\u002F*\nSubscriber 1: 0.72\nSubscriber 1: 0.33\nSubscriber 2: 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