Skip to content

24 - 激活的样式-指令 #2259

Open
Open
@mu-muw

Description

@mu-muw
// 你的答案
<script setup>

import { ref, watchEffect } from "vue"

/**
* 实现该指令 :
* 当切换该选项卡时,列表项文本颜色变为红色
* 
*/
const VActiveStyle = {
  //el 当前组件的根元素,{value} 是一个对象
  mounted(el, { value }) {
    const [sty, z] = value
    console.log(sty, z)
    watchEffect(() => {
      // 使用 Object.keys 获取 styles 对象的所有键
      Object.keys(sty).forEach(key => {
        // 将每个键对应的值应用到元素的样式上
        el.style[key] = z() ? sty[key] : ''
      })
    })
  }
}

const list = [1, 2, 3, 4, 5, 6, 7, 8]
const activeTab = ref(0)
function toggleTab(index) {
  console.log(index)
  activeTab.value = index
}

</script> 
<template>
  <ul>
    <li v-for="(item, index) in list" :key="index" v-active-style="[{ 'color': 'yellow' }, () => activeTab === index]"
      @click="toggleTab(index)">
      {{ item }}
    </li>
  </ul>
</template>

Activity

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

      Development

      No branches or pull requests

        Participants

        @mu-muw

        Issue actions

          24 - 激活的样式-指令 · Issue #2259 · webfansplz/vuejs-challenges