如果我点击列表中的一个(满足切换功能条件),那么它应该显示或不显示下拉菜单。到目前为止,方法切换会更改Chrome控制台中dropDownOpen的值,但视图中未显示任何更改代码:vue.js:更改值的切换方法,但在视图中没有行为改变
控制台显示值发生更改,并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>
脚本:
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>
这个解决方案行不通! – user3651872