问题描述
每当我有一个 Angular 表达式作为 input 的 type 的值时，它就不起作用:
Whenver I have an Angular expression as a value to input's type, it won't work:
<input ng-model="model" type="{{'number'}}">
数值被转换为字符串，复选框根本不起作用.
Numeric values get converted to strings and checkboxes won't work at all.
http://jsfiddle.net/punund/NRRj7/3/
推荐答案
您不能动态更改输入的类型，因为 IE 不允许这样做，并且 AngularJS 需要跨浏览器兼容.因此，即使您可能看到源代码中显示的已更改类型，AngularJS 也不会选择它 - 类型仅评估一次且无法更改.
You can't change input's type dynamically since IE disallows this and AngularJS needs to be cross-browser compatible. So even if you might see the changed type displayed in the source code AngularJS won't pick it up - type is only evaluated once and can't be changed.
请注意，同样的限制适用于 jQuery:jQuery 更改输入类型
Please note that the same restriction applies to jQuery: jQuery change input type
动态类型的唯一选项是自定义指令(您可以在其中下载动态模板或即时准备 DOM)或使用 ng-include 在输入的位置包含部分type 是一个静态值.
You only options for dynamic types are either a custom directive (where you can download a dynamic template or prepare DOM on-the-fly) or using ng-include to include include partials where the input type is a static value.
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