87 lines
1.5 KiB
Markdown
87 lines
1.5 KiB
Markdown
### v-bind:class
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#### 属性
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- 我们可以传给 `v-bind:class` 一个对象，以动态地切换 class
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```js
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<div
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class="static"
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v-bind:class="{ active: isActive, 'text-danger': hasError }"
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></div>
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data: {
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isActive: true,
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hasError: false
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}
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```
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#### 对象
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```js
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<div class="static active"></div>
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//绑定的数据对象不必内联定义在模板里：
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<div v-bind:class="classObject"></div>
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data: {
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classObject: {
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active: true,
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'text-danger': false
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}
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}
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data: {
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isActive: true,
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error: null
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},
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computed: {
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classObject: function () {
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return {
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active: this.isActive && !this.error,
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'text-danger': this.error && this.error.type === 'fatal'
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}
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}
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}
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```
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#### 数组
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```js
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<div v-bind:class="[activeClass, errorClass]"></div>
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data: {
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activeClass: 'active',
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errorClass: 'text-danger'
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}
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<div class="active text-danger"></div>
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<div v-bind:class="[isActive ? activeClass : '', errorClass]"></div>
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<div v-bind:class="[{ active: isActive }, errorClass]"></div>
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```
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#### 用在组件上
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组件中信息不会被覆盖而是追加
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### 绑定内联样式 v-bind:style
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- CSS property 名可以用驼峰式 (camelCase) 或短横线分隔 (kebab-case，记得用引号括起来) 来命名
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```html
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<div v-bind:style="{ color: activeColor, fontSize: fontSize + 'px' }"></div>
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<div v-bind:style="styleObject"></div>
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<div v-bind:style="[baseStyles, overridingStyles]"></div>
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```
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```js
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data: {
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activeColor: 'red',
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fontSize: 30
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}
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data: {
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styleObject: {
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color: 'red',
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fontSize: '13px'
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}
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}
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```
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