如何在Angular的数据类型上使用ngSwitch? [英] How to use ngSwitch on datatype in angular?

问题描述

我在angular2中工作，想知道当变量具有特定数据类型时是否可以使用ngSwitch加载<div>标签. 像这样的东西:

I was working in angular2 and was curious to know whether I could use ngSwitch to load <div> tag when variable is of certain datatype.i.e. something like this:

 <div [ng-switch]="value">
  <p *ng-switch-when="isObject(value)">This is Object</p>
  <p *ng-switch-when="isArray(value)">This is Array</p>
  <p *ng-switch-when="isBoolean(value)">This is Boolean</p>
  <p *ng-switch-when="isNumber(value)">This is Number</p>
  <p *ng-switch-default>This is Simple Text !</p>
</div>

当变量具有某种数据类型时，是否可以加载div标签? 如果没有，对此有什么解决方法?

is this possible to load the div tag when variable is of certain datatype? if not, any workaround for this?

推荐答案

一种替代方法是使用ngIf:

  <p *ngIf="isObject(value)">This is Object</p>
  <p *ngIf="isArray(value)">This is Array</p>
  <p *ngIf="isBoolean(value)">This is Boolean</p>
  <p *ngIf="isNumber(value)">This is Number</p>
  <p *ngIf="!isObject(value) || !isArray(value) || !isBoolean(value) || !isNumber(value)">This is Simple Text !</p>

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