角度2 ngIf和CSS过渡/动画
我希望div使用CSS从右角2滑入。
<div class="note" [ngClass]="{'transition':show}" *ngIf="show"> <p> Notes</p>
</div>
<button class="btn btn-default" (click)="toggle(show)">Toggle</button>
如果我仅使用[ngClass]来切换类并利用不透明性,则可以正常工作。但是li不想从一开始就渲染该元素,因此我先用ngIf“隐藏”了它,但是之后过渡将无法工作。
.transition{ -webkit-transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out;
-moz-transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out;
-ms-transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out ;
-o-transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out;
transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out;
margin-left: 1500px;
width: 200px;
opacity: 0;
}
.transition{
opacity: 100;
margin-left: 0;
}
回答:
另请参见https://github.com/angular/angular/blob/master/CHANGELOG.md#400-rc1-2017-02-24
有关更多详细信息,请参见
import { trigger, style, animate, transition } from '@angular/animations';@Component({
selector: 'my-app',
animations: [
trigger(
'enterAnimation', [
transition(':enter', [
style({transform: 'translateX(100%)', opacity: 0}),
animate('500ms', style({transform: 'translateX(0)', opacity: 1}))
]),
transition(':leave', [
style({transform: 'translateX(0)', opacity: 1}),
animate('500ms', style({transform: 'translateX(100%)', opacity: 0}))
])
]
)
],
template: `
<button (click)="show = !show">toggle show ({{show}})</button>
<div *ngIf="show" [@enterAnimation]>xxx</div>
`
})
export class App {
show:boolean = false;
}
*ngIf
当表达式变为时,从DOM中删除元素false
。您不能在不存在的元素上进行过渡。
改为使用hidden
:
<div class="note" [ngClass]="{'transition':show}" [hidden]="!show">
以上是 角度2 ngIf和CSS过渡/动画 的全部内容, 来源链接: utcz.com/qa/426817.html