This article will take you through Vue learning and talk about how to set up the 404 interface in Vue2 and Vue3. I hope it will be helpful to everyone!

In the vue page, if a route that does not exist is jumped, then the page will appear in a white screen state. In order to solve this problem, we can write a 404 interface ourselves. , let it jump over.

一.vue2

1.index.js

In this file, generally What is stored is our routing information. We often use path:'*' to capture our routing. If it does not exist, we will let it jump to our customized 404 page.

import Vue from 'vue'
import Router from 'vue-router'
import Homepage from '@/components/Homepage'
Vue.use(Router)

export default new Router({
  routes: [
    {
      path: '/',
      component: Homepage,
    },
    {
      path:'*',
      component:()=>import('../views/404.vue')
    }
  ]
})

Note: This path must be written on the outside. [Related recommendations: vuejs video tutorial, web front-end development]

2.404.vue page

We can usually customize this page, which generally includes a hyperlink to jump to a certain page or a timed amount of time to jump.

<template>
    <div>
        <p>
            页面将在<span>{{ time }}</span>秒后自动跳转首页，<br>
            您也可以点击这里跳转<a href="/">首页</a>
        </p>
    </div>
</template>

<script>
// 这里可以导入其他文件（比如：组件，工具js，第三方插件js，json文件，图片文件等等）

export default {
    name: &#39;&#39;,
    components: {

    },
    // 定义属性
    data() {
        return {
            time: &#39;10&#39;,
            time_end: null
        }
    },
    // 计算属性，会监听依赖属性值随之变化
    computed: {},
    // 监控data中的数据变化
    watch: {},
    // 方法集合
    methods: {
        GoIndex() {
            let _t = 9
            this.time_end = setInterval(() => {
                if (_t !== 0) {
                    this.time = _t--;
                } else {
                    this.$router.replace(&#39;/&#39;)
                    clearTimeout(this.time_end)
                    this.time_end = null
                }
            }, 1000)
        }
    },
    // 生命周期 - 创建完成（可以访问当前this实例）
    created() {
        this.GoIndex()
    },
    // 生命周期 - 挂载完成（可以访问DOM元素）
    mounted() {

    },
    beforeCreate() { }, // 生命周期 - 创建之前
    beforeMount() { }, // 生命周期 - 挂载之前
    beforeUpdate() { }, // 生命周期 - 更新之前
    updated() { }, // 生命周期 - 更新之后
    beforeDestroy() { }, // 生命周期 - 销毁之前
    destroyed() {
        clearTimeout(this.time_end)
        this.time_end = null
    }, // 生命周期 - 销毁完成
    activated() { }, // 如果页面有keep-alive缓存功能，这个函数会触发
}
</script>

<style scoped>
.not_found {
    width: 100%;
    height: 100%;
    background: url(&#39;../../static/img/404.gif&#39;) no-repeat;
    background-position: center;
    background-size: cover;

    p {
        position: absolute;
        top: 50%;
        left: 20%;
        transform: translate(-50%, 0);
        color: #fff;
        span{
            color: orange;
            font-family: &#39;仿宋&#39;;
            font-size: 25px;
        }
        a {
            font-size: 30px;
            color: aqua;
            text-decoration: underline;
        }
    }
}
</style>

Then the effect achieved is as shown below:

二.vue3

Why should we talk about them separately? Because in vue3 we make the following settings:

 {
      path:'*',
      component:()=>import('../views/404.vue')
    }

will generate an error, the error message: Catch all routes ("*") must now be defined using a param with a custom regexp., which means: must now be used All routes are defined with custom Regexp parameters ("*").

Then the official said this:

// plan on directly navigating to the not-found route using its name
{ path: '/:pathMatch(.*)*', name: 'not-found', component: NotFound },
// if you omit the last `*`, the `/` character in params will be encoded when resolving or pushing
{ path: '/:pathMatch(.*)', name: 'bad-not-found', component: NotFound },

Then the code in our index.js file in vue2 becomes as follows:

...

export default new Router({
  routes: [
    ...，
    {
      path:'/:pathMatch(.*)*',
      component:()=>import('../views/404.vue')
    }
    //或者
     {
      path:'/:pathMatch(.*)',
      component:()=>import('../views/404.vue')
    }
  ]
})

(Learning video sharing: vuejs introductory tutorial, Basic programming video)

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