vue3标签页切换组件封装类似el-tabs

使用

 <md_tabs>
   <md_tab_pane title="标签一">1md_tab_pane>
   <md_tab_pane title="标签二">2md_tab_pane>
   <md_tab_pane title="标签三">3md_tab_pane>
 md_tabs>
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实现

1、md_tabs.vue

<template>
  <div class="components-md-tabs">
    <header class="header">
      <div
        v-for="item in items"
        :key="item.title"
        :class="`header-btn ${
          active === item.title ? 'header-btn-active' : ''
        }`"
        @click="active = item.title"
      >
        {{ item.title }}
      div>
    header>

    
    <main ref="ref_main">
      <slot />
    main>
  div>
template>

<script setup>
import { ref, provide, onMounted } from "vue";

const items = ref([]);
const ref_main = ref();
const active = ref();
provide("active", active);

onMounted(() => {
  get_items();
});

function get_items() {
  let doms = [...ref_main.value.children];
  let arr = [];
  doms.forEach((node) => {
    arr.push({
      title: node.dataset.title
    });
  });
  active.value = arr[0].title;
  items.value = arr;
}
script>

<style lang="scss" scoped>
.components-md-tabs {
  .header {
    background: #f8f9fa;
    height: 60px;
    border-bottom: 1px solid #e9eaeb;
    display: flex;
  }

  .header-btn {
    height: 60px;
    cursor: pointer;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 1px;
  }
  .header-btn:hover {
    background: rgba(0, 0, 0, 0.1);
  }
  .header-btn-active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
  }
}
style>

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2、md_tab_pane.vue

<template>
  <div v-show="active === title" :data-title="title">
    <slot />
  div>
template>

<script setup>
import { inject } from "vue";
const props = defineProps({
  title: {
    type: String,
    default: ""
  }
});

const active = inject("active");
script>

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