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AngularJS: API: ng/directive/ngStyle

ngStyle

  1. - directive in module ng

ngStyle指令允许你在HTML元素上条件化设置CSS样式。

指令信息

  • 这个指令执行优先级为0.

用法

  • 作为属性使用:
    <ANY
      ng-style="">
    ...
    </ANY>
  • 作为CSS类使用:
    <ANY class="ng-style: ;"> ... </ANY>

参数

参数 类型 详述
ngStyle expression

结果为对象的表达式,对象的键名为CSS样式名,对象的键值为CSS名对应的值。

有些CSS样式名不能直接作为对象的键名,它们必须用引号括起来。参见下面例子中的 'background-color'样式。

示例

index.html
<input Type="button" value="set color" ng-click="myStyle={color:'red'}">
<input Type="button" value="set background" ng-click="myStyle={'background-color':'blue'}">
<input Type="button" value="clear" ng-click="myStyle={}"><br/>
<span ng-style="myStyle">Sample Text</span>
<pre>myStyle={{myStyle}}</pre>
style.css
span {
  color: black;}
protractor.js
var colorSpan = element(by.css('span'));

it('should check ng-style', Function() {
  expect(colorSpan.getCssValue('color')).toBe('rgba(0, 0, 0, 1)');
  element(by.css('input[value=\'set color\']')).click();
  expect(colorSpan.getCssValue('color')).toBe('rgba(255, 0, 0, 1)');
  element(by.css('input[value=clear]')).click();
  expect(colorSpan.getCssValue('color')).toBe('rgba(0, 0, 0, 1)');});
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