angular - 使用 Angular 材质按钮时更新 Angular Element Ref 损坏

Question

我正在尝试通过指令更新按钮上的 disabled 属性。但是mat-raised-button在按钮上有属性不会让按钮被设置为禁用。这是我的 HTML。

<button  mat-raised-button color="primary" *hasPermission="PERMISSION_TYPES.Admin; justDisable: true" >
    DISABLE USER
</button>

然后在我的结构指令中，我禁用了按钮。

@Directive({
    selector: '[hasPermission]', // tslint:disable-line
})
export class HasPermissionDirective implements OnInit {
    @Input() public hasPermission;
    @Input() public hasPermissionJustDisable = false;
    constructor(
        private viewContainer: ViewContainerRef,
        private templateRef: TemplateRef<any>,
        private permissionService: PermissionValidationService,
        private elementRef: ElementRef<any>) {
    }

    ngOnInit(): void {
        this.checkPermission();
    }

    private checkPermission() {
        this.permissionService.hasValidPermission(this.hasPermission)
            .then((hasPermission) => {
                if (!hasPermission && !this.hasPermissionJustDisable) {
                    this.viewContainer.clear();
                    return;
                }
                if (!hasPermission && this.hasPermissionJustDisable) {
                    this.viewContainer.createEmbeddedView(this.templateRef);
                    this.elementRef.nativeElement.nextElementSibling.setAttribute('disabled', 'disabled');
                    return;
                }
                this.viewContainer.createEmbeddedView(this.templateRef);
            });
    }
}

问题是，它不会禁用按钮..但是如果我删除了mat-raised-button这样的：

            <button  *hasPermission="PERMISSION_TYPES.Admin; justDisable: true" >
                DISABLE USER
            </button>

然后该按钮被禁用。它必须与角度材料如何渲染这些有关。任何帮助，将不胜感激。

谢谢，

标签： angularangular-materialangular-directive

Answer 1

我能够通过将禁用的设置包装成这样来解决它SetTimeout：

if (!hasPermission && this.hasPermissionJustDisable) {
                    this.viewContainer.createEmbeddedView(this.templateRef);
                    // Timeout is required for some rendering quark with angular material buttons..
                    setTimeout(() => {
                        this.renderer.setAttribute(this.elementRef.nativeElement.nextElementSibling, 'disabled', 'disabled');
                    });
                    return;
                }