[英]Return an observable from setTimeout (Rxjs)
您如何從setTimeout
返回一個observable?
send(action):Observable<any>{
if(this.readyState === 0 ){
setTimeout(() => this.send(action), this.timeout);
}
else{
// observable is an Rxjs observable....
return this.observable$.take(1);
}
}
復制和粘貼示例:
let observable$ = Rx.Observable.fromArray([1, 2, 3, 4, 5]);
timeout = 40;
// if you switch this to 1 it works..
readyState = 0;
setTimeout( () => readyState = 1, 120);
send().subscribe(c => console.log(c));
function send(action){
if(readyState === 0 ){
setTimeout(() => send(action), timeout);
}
else{
return observable$.take(1);
}
}
這樣的事情(您不能從setTimeout()
返回任何內容):
send(action):Observable<any>{
if(this.readyState === 0 ){
return Observable.timer(this.timeout)
.mergeMap(() => this.send(action))
.take(1);
}
else{
// observable is an Rxjs observable....
return this.observable$.take(1);
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.