我做了以下指令:
import { Directive, ElementRef, HostListener, Input, OnInit } from '@angular/core';
import { Observable, Subscription } from 'rxjs/Rx';
@Directive({
selector: '[myDisabled]'
})
export class DisableDirective implements OnInit {
private el: HTMLElement;
@Input('myDisabled') isDisable: boolean;
constructor(el: ElementRef) { this.el = el.nativeElement;}
ngOnInit() {
this.disable();
}
private disable() {
this.isDisable ? this.el.style.opacity = '0.65' : this.el.style.opacity = '1';
}
}
该指令设置按钮的不透明度取决于输入:isDesable。当输入改变时,需要刷新此设置,但是,我不知道如何操作。
我像这样使用这个指令:
<button class="btn" [myDisabled]="!sharedDetails.isEnabled">A button !</button>
答案 0 :(得分:0)
两种方式
// called every time after inputs are updated
// check the `changes` parameter for details if you have more than one input
ngOnChanges(changes) {
this.disable();
}
或
{{1}}