动画设定：

import {trigger，state,

transition,

style,animate,keyframes,group,query,stagger,} from '@angular/animations';

export const listAnimation = trigger('listAnim',[

transition('* => *', [

query(':enter', style({opacity: 0}),{optional:true}),

query(':enter', stagger(100, [

animate('1s', style({opacity: 1}))

]),{optional: true}),

query(':leave', style({opacity: 1}),{optional:true}),

query(':leave', stagger(100, [

animate('1s', style({opacity: 0}))

]),{optional: true}),

])

]);

删除数据内容方法：

launchConfirmDialog(project) {

const dialogRef= this.dialog

.open(ConfirmDialogComponent,

{data: {title: "删除", content: "是否删除此项目？"}});

dialogRef.afterClosed().subscribe( result => {

console.log(result);

this.projects= this.projects.filter(p => p.id != project.id)

});

}

删除过度无效？目前删除就直接没了，求指教