Question

我通过

向主持人添加了动画

@Component({
   ....,
   animations: [
      trigger('slideIn', [
          ...
      ])
   ],
   host: {
      '[@animation]': 'condition'
   }
}

运行良好，在编译时我被告知这个已被弃用，我应该使用@HostBinding ......

@HostBinding('[@animation]') get slideIn() {
   return condition;
}

这会引发错误

Can't bind to '[@animation' since it isn't a known property of 'my-component-selector'.

但我无法在我的模块中添加动画..我该怎么办？

Answer 1

@HostBinding()

不需要方括号

@HostBinding('@slideIn') get slideIn() {

有两个装饰器@HostBinding()和@HostListener()因此()和[]之间的区别是不必要的，而host: [...]是<div id="myframe"></div>时的区别使用

Answer 2

我之所以写这个答案，是因为我在语法上有些挣扎，并且我喜欢假人的例子，但是Günter的答案是正确的。

我必须要做的：

@Component({
    selector: 'app-sidenav',
    templateUrl: './sidenav.component.html',
    styleUrls: ['./sidenav.component.scss'],
    animations: [
        trigger('toggleDrawer', [
            state('closed', style({
                transform: 'translateX(0)',
                'box-shadow': '0px 3px 6px 1px rgba(0, 0, 0, 0.6)'
            })),
            state('opened', style({
                transform: 'translateX(80vw)'
            })),
            transition('closed <=> opened', animate(300))
        ])
    ]
})
export class SidenavComponent implements OnInit {

    private state: 'opened' | 'closed' = 'closed';

    // binds the animation to the host component
    @HostBinding('@toggleDrawer') get getToggleDrawer(): string {
        return this.state === 'closed' ? 'opened' : 'closed';
    }

    constructor() { }

    ngOnInit(): void {
    }

    // toggle drawer
    toggle(): void {
        this.state = this.state === 'closed' ? 'opened' : 'closed';
    }

    // opens drawer
    open(): void {
        this.state = 'opened';
    }

    // closes drawer
    close(): void {
        this.state = 'closed';
    }

}

将角度动画添加到主机元素

2 个答案: