Promise VS Rxjs

Promise

let promise = new Promise(resolve => {    let timer = setTimeout(() => {        resolve('promise resolve');    }, 2000);});promise.then(value => {    console.log('value = ', value)});

Rxjs

let stream = new Observable(observer => {    let timer = setTimeout(() => {        observer.next('observer...');    }, 2000);});let handle = stream.subscribe(value => console.log(value));

另 Rxjs :

// 取消订阅setTimeout(()=>{    handle.unsubscribe();}, 1000)；// 连续触发let stream2 = new Observable(observer => {    let count = 0;    let timer = setInterval(() => {        observer.next(count);        count++;    }, 1000);});stream2.subscribe(value => console.log('stream2 = ', value));