英文:
angular array observable does not get updated
问题
HTML中的内容无需翻译，但是你提供的HTML代码中包含一些HTML实体编码，需要还原成正常的HTML标记。以下是已翻译和修复的HTML代码：
<small>{{(selectedLangs$ | async)}}</small>
请注意，HTML代码中的特殊字符已被还原，现在可以正确显示。如果数组的值发生更改，HTML中的小标签内容应该会相应更新。
英文:
I have ts code as below
selectedLangs : string[] = []selectedLangs$: Observable<string[]> = of(this.selectedLangs);ngOnInit(){this.form.get( 'languages' ).valueChanges.pipe(takeUntil( this._unSubscribeAll ),tap( langs => {this.selectedLangs = [];if( langs ) {langs.forEach( ( lang: IOption ) => {if( this.selectedLangs.find( f => f === lang ) === undefined ) {this.selectedLangs.push( lang )}} )}} )).subscribe();}
html
<small>{{(selectedLangs$ | async)}}</small>
Should my html be updated if I am changing the value of the array?
答案1
得分: 1
这是您想要做的吗？
selectedLangs$: BehaviorSubject<string[]> = new BehaviorSubject([]);ngOnInit() {this.form.get('languages').valueChanges.pipe(takeUntil(this._unSubscribeAll),tap((langs: IOption[]) => {const uniqueLangs = [...new Set(langs)];this.selectedLangs$.next(uniqueLangs);})).subscribe();}
英文:
Is this what you want to do?
selectedLangs$: BehaviorSubject<string[]> = new BehaviorSubject([]);ngOnInit() {this.form.get('languages').valueChanges.pipe(takeUntil(this._unSubscribeAll),tap((langs: IOption[]) => {const uniqueLangs = [...new Set(langs)];this.selectedLangs$.next(uniqueLangs);})).subscribe();}
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