Vue如何使得导航栏文字光标如何与内容同步

- 日理万妓 2024-03-30 13:34 66阅读 0赞

## Vue如何使得导航栏文字光标如何与内容同步 ##

**效果演示**：  
当我们点击上方链接的时候，这个光标会随着我们的点击，在不同的地方发生变化。  
![在这里插入图片描述][2693dd60fb564882888246b00102c7ca.png]  
**项目结构**  
这是一个标准的vue项目的结构。  
![在这里插入图片描述][c7fd86683c414b83b3ea8f33f751c15c.png]

**完整代码**：  
这个是上方导航栏的组件代码。  
**NavBar.vue**

<template>
        <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
      <div class="container">
        <router-link class="navbar-brand" :to="{name: 'home'}">King Of Bots</router-link>
        <div class="collapse navbar-collapse" id="navbarText">
          <ul class="navbar-nav me-auto mb-2 mb-lg-0">
            <li class="nav-item">          
              <router-link :class="route_name == 'pk_index' ? 'nav-link active' : 'nav-link' " :to="{name: 'pk_index'}">对战</router-link>
            </li>
            <li class="nav-item">
              <router-link :class="route_name == 'record_index' ? 'nav-link active' : 'nav-link' " :to="{name: 'record_index'}">对局列表</router-link>
            </li>
            <li class="nav-item">
              <router-link :class="route_name == 'ranklist_index' ? 'nav-link active' : 'nav-link' " :to="{name: 'ranklist_index'}">排行榜</router-link>          
            </li>
          </ul>
          <ul class="navbar-nav">
            <li class="nav-item dropdown">
              <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                极客李华
            </a>
              <ul class="dropdown-menu">
                <router-link class="dropdown-item" :to="{name: 'user_bot_index'}">我的Bot</router-link>
                <li>              
                  <hr class="dropdown-divider">
                </li>
                <li><a class="dropdown-item" href="#">退出</a></li>
                
              </ul>
            </li>
          </ul>
        </div>
      </div>
    </nav>
    </template>
    
    <script>
    import {
          useRoute} from 'vue-router'
    import {
          computed} from 'vue'
    
    export default{
          
      setup(){
          
        const route = useRoute();
        // computed可以计算当前的route是哪个 并返回它的名字
        let route_name = computed(() => route.name)
        return {
          
          route_name
        }
      }
    }
    </script>
    <style>
    
    </style>

**index.js**

import {
         createRouter, createWebHistory } from 'vue-router'
    import PkIndexView from '../views/pk/PkIndexView'
    import RecordindexView from '../views/record/RecordindexView'
    import RanklistindexView from '../views/ranklist/RanklistindexView'
    import UserBotindexView from '../views/user/bot/UserBotindexView'
    import NotFound from '../views/error/NotFound'
    
    
    const routes = [
      {
        
        path: "/",
        name: "home",
        redirect: "/pk/"
      },
      {
        
        path: "/pk/",
        name: "pk_index",
        component: PkIndexView,
      },
      {
        
        path: "/record/",
        name: "record_index",
        component: RecordindexView,
      },
      {
        
        path: "/ranklist/",
        name: "ranklist_index",
        component: RanklistindexView,
      },
      {
        
        path: "/user/bot/",
        name: "user_bot_index",
        component: UserBotindexView,
      },
      {
        
        path: "/404/",
        name: "404",
        component: NotFound,
      },
      {
        
        path: "/:catchAll(.*)",
        redirect: "/404/"
      },
    ]
    
    const router = createRouter({
        
      history: createWebHistory(),
      routes
    })
    
    export default router

**提取代码讲解**

computed函数可以时时的获取当前的route的名字，具体写法就是下面的样子，然后返回每次的route的名字。

让这里的三元表达式获取到之后，进行判断，然后如果当前的这个标签是当前网页在运行的，那么就让这个样式里面再加上的一个active。

<router-link :class="route_name == 'pk_index' ? 'nav-link active' : 'nav-link' " :to="{name: 'pk_index'}">对战</router-link>

[2693dd60fb564882888246b00102c7ca.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/1d0484b5ebf94b4e98a1c05b286b3986.png
[c7fd86683c414b83b3ea8f33f751c15c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/e466c278aa4448dbb5eae0bc55eb4036.png