根据AJAX请求的返回结果产生Observable对象。 Rx.Observable.fromEvent(document.querySelector('#getStar'),'click').subscribe(()=>{Rx.Observable.ajax('https://api.github.com/repos/ReactiveX/rxjs',{responseType:'json'}).subscribe(value=>{conststarCount=value.response.stargazers_count;document.querySelec...
import { Observable } from 'rxjs'; const observable = new Observable(subscriber => { subscriber.next(1); subscriber.next(2); subscriber.next(3); setTimeout(() => { subscriber.next(4); subscriber.complete(); }, 1000); }); console.log('just before subscribe'); observable.subscribe({...
constmyObservable=Observable.of(1,2,3);// Create observer objectconstmyObserver={next:x=>console.log('Observer got a next value: '+x),error:err=>console.error('Observer got an error: '+err),complete:()=>console.log('Observer got a complete notification'),};// Execute with the observ...
() .take(amount); } var clicks = Rx.Observable.fromEvent(button, 'click'); clicks.debounce(1000) .flatMap(getResults(5)) .subscribe( function(value) { console.log('Received value', value); }, function(err) { console.error(err); }, function() { console.log('All values retrieved!'...
import { Observable } from 'rxjs' const observable = new Observable<number>(subscriber => { subscriber.next(1) subscriber.next(2) subscriber.complete() }) observable.subscribe({ next: data => console.('next data:', data), complete: () => { ...
.concatMap( e => Rx.Observable.interval(100).take(3) ); example.subscribe({ next: (value) => { console.log(value); }, error: (err) => { console.log('Error: ' + err); }, complete: () => { console.log('complete'); } ...
function create(subscriber) { var observable = { subscribe: function (observer) { subscriber(observer) }, } return observable } var observable = create(function (observer) { observer.next(1) observer.next(2) observer.next(3) }) var observer = { next: function (value) { console.log(value...
import { Observable } from 'rxjs'; const observable=newObservable(subscriber =>{ console.log('1'); subscriber.next(); console.log('3'); }); console.log('0'); observable.subscribe(()=>{ console.log('2'); }); console.log('4'); ...
varObserver={next(value){/* 处理值*/},error(error){/* 处理异常 */},complete(){/* 处理已完成态 */}}; 结合迭代器 Iterator 进行理解: next() Observer 提供一个 next 方法来接收 Observable 流,是一种 push 形式;而 Iterator 是通过调用 iterator.next() 来拿到值,是一种 pull 的形式。
Observer:是一个回调集合,它知道如何监听 Observable 传递的值。 Subscription:表示一个 Observable 的执行,主要用于取消执行。 Operators:** 是纯函数,可以使用函数式编程风格来处理具有map、filter、concat、reduce等操作的集合。