在点击事件上更改选定的选项卡

Question

我是 Vuejs 的新手，我想在单击事件时更改选定的导航选项卡我尝试使用函数但控制台抛出错误：

vue.runtime.global.js:8392 Uncaught TypeError: _ctx.changeTab is not a 功能

CodePen

我想要做的是在@click 事件上运行一个函数来更改选定的选项卡并根据单个段落元素中的选定选项卡显示内容

代码：

<template>
  <div>
    <div class="sm:hidden">
      <label for="tabs" class="sr-only">Select a tab</label>
      <select id="tabs" name="tabs" class="block w-full focus:ring-indigo-500 focus:border-indigo-500 border-gray-300 rounded-md">
        <option v-for="tab in tabs" :key="tab.name" :selected="tab.current">{{ tab.name }}</option>
      </select>
    </div>
    <div class="hidden sm:block">
     <nav class="flex space-x-4" aria-label="Tabs" :class="bg-gray-600">
        <a v-for="tab in tabs" @click="changeTab(tab)"  :key="tab.name" :href="tab.href" :class="[tab.current ? 'bg-purple-700 text-white' : 'text-purple-700 hover:text-gray-700', 'px-12 py-2 font-medium text-sm rounded-full font-bold text-lg']" >
          {{ tab.name }}
        </a>
      </nav>
    </div>
  </div>
</template>

<script>
const tabs = [
  { id: 1 , name: 'LOREM', href: '#test1', current: false },
  { id: 2, name: 'IPSUM', href: '#test2', current: false },
  { id: 3, name: 'PDF', href: '#test3', current: true },
]
export default {
  setup() {
    return {
      tabs,
    }
    
     function changeTab(selectedTab){
      let test = this.tabs.find(selectedTab.id);
       
       console.log(test)
    }
  },
}
</script>


<style>
  nav {
    width: max-content; 
    display: flex;
    gap: 20px; 
    background: #E5E5E5; 
    border-radius: 20px; 
}
</style>

我怎样才能做到这一点？问候

Answer 1

试试这样：

<template>
  <div>
    <div class="hidden sm:block">
     <nav class="flex space-x-4 bg-gray-600" aria-label="Tabs" >
        <a v-for="tab in tabs" @click="changeTab(tab)"  :key="tab.name" :href="tab.href" :class="[tab.current ? 'bg-purple-700 text-white' : 'text-purple-700 hover:text-gray-700', 'px-12 py-2 font-medium text-sm rounded-full font-bold text-lg']" >
          {{ tab.name }}
        </a>
      </nav>
    </div>
    <div v-for="tab in tabs" @click="changeTab(tab)"  :key="tab.name" :href="tab.href" class="px-12" :class="[tab.current || 'hidden']">
      {{ tab.id }} - {{ tab.name }} - {{  tab.href }}
    </div>
  </div>
</template>

<script>
import { ref } from 'vue'
export default {
  setup() {
    const tabs = ref([
      { id: 1 , name: 'LOREM', href: '#test1', current: false },
      { id: 2, name: 'IPSUM', href: '#test2', current: false },
      { id: 3, name: 'PDF', href: '#test3', current: true },
    ])
    
    const  changeTab = (selectedTab) => {
      tabs.value.map(t => {
        t.id === selectedTab.id ? t.current = true : t.current = false
      });
    }
    
    return { tabs, changeTab }
    
  },
}
</script>