批量更新时的重复单元动画

在进行批量更新时，如果希望为每个更新的单元添加动画效果，可以使用一些前端框架或库来实现。以下是一些常见的方法：

使用React和CSS动画

1. 安装依赖： npm install react-transition-group
2. 创建动画组件： import React, { useState } from 'react'; import { TransitionGroup, CSSTransition } from 'react-transition-group'; import './styles.css'; const Item = ({ item }) => ( <CSSTransition in={item.visible} timeout={300} classNames="item" unmountOnExit > <div className="item">{item.name}</div> </CSSTransition> ); const App = () => { const [items, setItems] = useState([ { id: 1, name: 'Item 1', visible: true }, { id: 2, name: 'Item 2', visible: true }, { id: 3, name: 'Item 3', visible: true }, ]); const handleUpdate = () => { setItems(prevItems => prevItems.map(item => ({ ...item, visible: !item.visible, })) ); }; return ( <div> <button onClick={handleUpdate}>Update Items</button> <TransitionGroup className="item-list"> {items.map(item => ( <Item key={item.id} item={item} /> ))} </TransitionGroup> </div> ); }; export default App;
3. 添加CSS样式： .item-list { display: flex; flex-direction: column; } .item { opacity: 1; transition: opacity 300ms ease-in-out; } .item-enter { opacity: 0; } .item-enter-active { opacity: 1; } .item-exit { opacity: 1; } .item-exit-active { opacity: 0; }

使用Vue和过渡组件

1. 创建Vue组件： <template> <div> <button @click="handleUpdate">Update Items</button> <transition-group name="item" tag="div" class="item-list"> <div v-for="item in items" :key="item.id" class="item"> {{ item.name }} </div> </transition-group> </div> </template> <script> export default { data() { return { items: [ { id: 1, name: 'Item 1', visible: true }, { id: 2, name: 'Item 2', visible: true }, { id: 3, name: 'Item 3', visible: true }, ], }; }, methods: { handleUpdate() { this.items = this.items.map(item => ({ ...item, visible: !item.visible, })); }, }, }; </script> <style> .item-list { display: flex; flex-direction: column; } .item { opacity: 1; transition: opacity 300ms ease-in-out; } .item-enter-active, .item-leave-active { transition: opacity 300ms; } .item-enter-from, .item-leave-to { opacity: 0; } </style>

使用Angular和动画模块

1. 导入动画模块： import { trigger, state, style, transition, animate } from '@angular/animations';
2. 定义动画： @Component({ selector: 'app-item', template: `<div [@itemAnimation]="item.visible ? 'visible' : 'hidden'">{{ item.name }}</div>`, animations: [ trigger('itemAnimation', [ state('visible', style({ opacity: 1 })), state('hidden', style({ opacity: 0 })), transition('visible => hidden', animate('300ms')), transition('hidden => visible', animate('300ms')), ]), ], }) export class ItemComponent { @Input() item: any; }
3. 在父组件中使用： @Component({ selector: 'app-root', template: ` <button (click)="handleUpdate()">Update Items</button> <div *ngFor="let item of items" [item]="item"> <app-item [item]="item"></app-item> </div> `, }) export class AppComponent { items = [ { id: 1, name: 'Item 1', visible: true }, { id: 2, name: 'Item 2', visible: true }, { id: 3, name: 'Item 3', visible: true }, ]; handleUpdate() { this.items = this.items.map(item => ({ ...item, visible: !item.visible, })); } }

通过这些方法，你可以在批量更新时为每个单元添加动画效果，提升用户体验。