我們可以將一個物件傳遞給 v-bind:class 來動態切換類別：
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| //html
<div id="app">
<div
class="static"
:class="{ active: isActive }"
>Class</div>
<button @click="changeClass">改變Class</button>
<div class="style" v-bind:style="{ color: activeColor, fontSize: fontSize + 'px' }">Style</div>
<button class="green" @click="changeStyle">改變style</button>
</div>
</div>
//script
var app = new Vue({
el: '#app',
data: {
//class
isActive: false,
//style
activeColor: 'red',
fontSize: 30
},
methods: {
changeClass: function () {
const vm=this;
vm.isActive=!vm.isActive;
},
changeStyle: function () {
const vm=this;
vm.activeColor='blue';
vm.fontSize=18;
},
}
})
|
Vue 菜單active
點擊 獲取 Ｍenu index索引後 讓 menuActive＝index時;
判斷 menuActive == index時 li 塞入isActive;
isActive 是Class 的樣式
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| //Html
<div id="app">
<ul>
<li
v-for="(item,index,id) in menus"
:key="id"
:class="menuActive == index ? 'isActive' : ''"
@click="menuClickActive(index)"
>
{{ item.title }}
</li>
</ul>
</div>
//Style
var app = new Vue({
el: '#app',
data: {
menus: [
{ id:'',title: '首頁' },
{ id:'',title: '關於我們' },
{ id:'',title: '聯絡我們' }
],
menuActive:0,
},
methods: {
menuClickActive : function (index) {
const vm =this;
vm.menuActive =index;
}
}
})
//Style
ul{
display:flex;
li{
display:flex;
margin:auto 10px;
&.isActive{
border-bottom:1px solid #333;
}
}
}
|