如何用一个按钮展开或折叠 ElementPlus Vue3 库的所有 el-collapse-item？

Question

使用此代码，如何展开和折叠..用一个按钮切换 ElementPlus Vue3 库的所有 el-collapse-items ？

<template>
<div class="demo-collapse">
<el-collapse v-model="activeName" accordion>
  <el-collapse-item title="Consistency" name="1">

<script lang="ts" setup>
import { ref } from 'vue'

const activeName = ref('1')
</script>

https://element-plus.org/en-US/component/collapse.html#accordion

Answer 1

请看一下以下代码片段：

const { ref } = Vue

const app = Vue.createApp({
  setup() {
    const items = ref([{id: 1, title: "first", text: "aaaaaaaaaaaa"}, {id: 2, title: "second", text: "bbbbbbbbbbbb"}, {id: 3, title: "third", text: "ccccccccccc"}])
    const activeName = ref([1]);
    const toggleAll = () => {
      activeName.value = activeName.value.length === items.value.length 
        ? [] 
        : items.value.map(i => i.id)
    }
    return { items, activeName, toggleAll };
  },
})
app.use(ElementPlus);
app.mount('#demo')

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    toggle all
  
  

    
      
        

          {{ item.text }}
        
      
    
  

Answer 2

您无法在手风琴模式下执行此操作。正如文档所述：

为此，您必须删除 accordion 属性并将 activeName 值更改为数组，就像文档中一样：

const activeNames = ref(['1'])

要展开/折叠所有项目，您可以创建一个函数，该函数将更改 activeNames 的值以包含 el-collapse-item名称 /em> 组件或为空，例如

toggleElements() {
  if(activeName.value.length) {
    activeName.value = [];
  } else {
    activeName.value = ['1', '2', '3', ...];
  }
}