本文使用的是angular6内置的rxjs,版本号为6.3.3 concat 通过顺序地发出多个 Observables 的值将它们连接起来,一个接一个的. 参数: 名称 类型 属性 描述 other ObservableInput 等待被连接的 Observable. 可以接受多个输入 Observable. scheduler Scheduler 可选的,默认值: null 可选的调度器,控制每个输入 Observable 的订阅. const timer1 = interval(1000)…

操作符文档 api 列表 do -> tap catch -> catchError switch -> switchAll finally -> finalize map switchMap mergeMap mep 类似于 Array.prototype.map() switchMap switchMap 会停止发出先前发出的内部 Observable 并开始发出新的内部 Observable 的值.(可以停止上一次发出的ajax) mergeMap 将每个值映射到Observ…

操作符文档 API create const { Observable } = require('rxjs'); // 创建 Observables var observable = Observable.create(observer => { var id = setInterval(() => { subscriber.next(123); subscriber.error('err: ...'); subscriber.complete('done.'); }, 1000); // 提…

Debounce and debounceTime operators are similar to delayWhen and delay, with the difference that they may drop some emissions. This lesson teaches you how debounce works and where is it useful, for instance when building a type-ahead UI. debounceTime…

This lessons teaches about delay and delayWhen: simple operators that time shift. delay(number | date) var foo = Rx.Observable.interval(500).take(5); /* --0--1--2--3--4| delay(1000) -----0--1--2--3--4| */ // delay(1000) var result = foo.delay(1000);…

Operators take(), skip(), and first() all refer to values emitted in the beginning of an Observable execution. In this lesson we will see similar operators which refer instead to the end of an Observable execution, such as takeLast(). takeLast(number…

There are more operators in the filtering category besides filter(). This lesson will teach how take(), first(), and skip() are simply operators to ignore or pass a certain amount of events from the source Observable.  take(number): var foo = Rx.Obse…

It is quite common to need an Observable that ticks periodically, for instance every second or every 100 miliseconds. We will learn about operators interval() and timer(), both of which are similar to setInterval() in JavaScript. Interval(period): Yo…

This lesson introduces operators empty(), never(), and throw(), which despite being plain and void of functionality, are very useful when combining with other Observables. empty: var foo = Rx.Observable.empty(); // the same as var foo = Rx.Observable…

api列表 Subject Subject是可观察的一种特殊类型,它允许将值多播到许多观察者 import {Subject} from 'rxjs'; const l = console.log; let x$ = new Subject<number>(); x$.subscribe(v => l(`a => ${v}`)); // 1, 2, 3 x$.next(1); x$.next(2); setTimeout(() => { x$.subscribe(v =>…