如果我點擊列表中的一個(滿足切換功能條件),那麼它應該顯示或不顯示下拉菜單。到目前爲止,方法切換會更改Chrome控制檯中dropDownOpen的值,但視圖中未顯示任何更改代碼:vue.js:更改值的切換方法,但在視圖中沒有行爲改變
控制檯顯示值發生更改,並且它在模板中未更改!
<ul>
<li v-for="(navHeading, index) in headerMenuItems" @click="toggle(navHeading.name)" :class="{'open': dropDownOpen}">
<icon :glyph="navMenuIconNames[index]" :viewBox="navMenuIconNames[index].viewBox" :height="25" :width="50"></icon>
<a class="navigation-title" href="#">{{ navHeading.name }}</a>
<ul class="drop-down-menu">
<li v-for="dropDownMenuItem in navHeading.children">
<a class="drop-down-menu-item-title">{{ dropDownMenuItem.name }}</a>
</li>
</ul>
</li>
</ul>
腳本:
data() {
const dropDownOpen = false
return { dropDownOpen }
},
methods: {
toggle: (dropDownName) => {
if (dropDownName === 'Meer') {
this.dropDownOpen = !this.dropDownOpen
}
console.log(this.dropDownOpen)
return this.dropDownOpen
}
}
CSS:
<style scoped>
.open .drop-down-menu {
display: block;
background-color: tomato;
}
.drop-down-menu {
display: none;
}
</style>
這個解決方案行不通! – user3651872