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AngularJS: API: ng/directive/ngStyle
ngStyle
- - 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)');});