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博客园 - Sameen

上下文工程学习笔记 什么是vibe ? 什么是 embedding ? angular中asObservable是什么的,为什么需要用? vscode问题 document cookie JavaScript中的Date squash merge Element.scrollIntoView requestIdleCallback [转]React hooks useEffect中如何使用异步函数(即如何使用async/await) css斜条纹背景——linear-gradient 【转】过滤不可见字符 换电脑快捷同步vscode插件和配置 Git自动补全配置安装(Mac版本) Mac上看不到.git目录下的隐藏文件的解决方法 ts 问号点 ?. moment获取本月、上个月、近三个月时间段 iframe优缺点
angular学习笔记
Sameen · 2022-12-26 · via 博客园 - Sameen

*ngSwitch

1. 用法

<div [ngSwitch]="num">
    <div *ngSwitchCase="0"> 0</div>
    <div *ngSwitchCase="1"> 1</div>
    <div *ngSwitchDefault>默认的</div>
</div>

上面的相当于js

switch(num){
    case 0: return 0;
    case 1: return 0;
    default: return '默认的';
}

2. ngSwitchCase如何写多个条件呢?

<div [ngSwitch]="num">
    <div *ngSwitchCase="0"> 0</div>
    <div *ngSwitchCase="(num === 1 || num===4) ? num : ''"  > 1或者4</div>
    <div *ngSwitchDefault>默认的</div>
</div>

上面的相当于js

switch(num){
    case 0: return 0;
    case 1:
    case 4: return '1或4';
    default: return '默认的';
}