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javascript - Vue.js：手风琴在 for 循环中不起作用

问题描述

我为单个项目添加了手风琴，它工作正常，但后来我添加了 for 循环，现在当我单击任何项​​目时，所有项目都得到扩展。

<template>
<ul class="level-0-wrp" v-if="headerDesktopMenu.menu.menu_items">
    <li class="level-0" v-for="(menu, index) in headerDesktopMenu.menu.menu_items" :key="index" :class="accordionClasses" v-if="headerDesktopMenu.menu.menu_items">
        <a class="title" @click="toggleAccordion">{{ menu.item_name }}</a>
        <ul class="level-1-wrp" v-if="menu.childrens">
            <li class="level-1" v-for="(submenuone, indexone) in menu.childrens" :key="indexone" v-if="menu.childrens">
                <a class="title">{{ submenuone.item_name }}</a>
            </li>
        </ul>
    </li>
</ul>
</template>

<script>
export default {
    data () {
        return {
            isOpen: false
        }
    },

    methods: {
        toggleAccordion () {
        this.isOpen = !this.isOpen;
        }
    },
    computed: {
        accordionClasses () {
        return {
            'is-closed': !this.isOpen,
            'is-primary': this.isOpen,
            'is-dark': !this.isOpen
        };
        }
    }

}

如图所示，如果我点击男性、女性和配饰，则会展开。

在此处输入图像描述

标签： javascriptvue.jsvuejs2accordion

解决方案

试试下面的代码片段：

您可以添加另一个数据属性selected: ''，然后在模板中切换手风琴v-if="isOpen && menu.item_name === selected"。在您设置的方法中选择：

toggleAccordion (item) {
  item == this.selected ? this.isOpen = !this.isOpen : this.isOpen = true
  this.selected = item
}`


new Vue({
  el: '#demo',
  data () {
    return {
      isOpen: false,
      selected: '',
      headerDesktopMenu: {
        menu: {
          menu_items: [{item_name:11111, childrens: [{item_name: 11}, {item_name: 12}]},{item_name:22222, childrens: [{item_name: 21}, {item_name: 22}]},{item_name:33333, childrens: [{item_name: 31}, {item_name: 32}]},{item_name:44444, childrens: [{item_name: 41}, {item_name: 42}]}]
        }
      }
    }
  },
  methods: {
    toggleAccordion (item) {
      item == this.selected ? this.isOpen = !this.isOpen : this.isOpen = true
      this.selected = item
    }
  },
  computed: {
    accordionClasses () {
      return {
        'is-closed': !this.isOpen,
        'is-primary': this.isOpen,
        'is-dark': !this.isOpen
      };
    }
  }
})

Vue.config.productionTip = false
Vue.config.devtools = false
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="demo">
  <ul class="level-0-wrp" v-if="headerDesktopMenu.menu.menu_items">
      <li class="level-0" v-for="(menu, index) in headerDesktopMenu.menu.menu_items" :key="index" :class="accordionClasses" v-if="headerDesktopMenu.menu.menu_items">
          <a class="title" @click="toggleAccordion(menu.item_name)">{{ menu.item_name }}</a>
          <ul class="level-1-wrp" v-if="menu.childrens">
              <li class="level-1" v-for="(submenuone, indexone) in menu.childrens" :key="indexone" v-if="isOpen && menu.item_name === selected">
                  <a class="title">{{ submenuone.item_name }}</a>
              </li>
          </ul>
      </li>
  </ul>
</div>

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