Discuss the reasons and solutions why Vue routing jumps are useless

With the continuous development of front-end technology, Vue, as a popular open source JavaScript framework, more and more people are beginning to use it to build their own front-end applications. However, during the Vue development process, some people may encounter invalid routing jumps. This article will explore the reasons why Vue routing jumps are useless and the solutions.

1. Confirm whether the routing is correctly introduced

Before using Vue-Router, you first need to install it and introduce routing into the project. If the route is not imported correctly, the route jump will naturally be invalid. To use the functions provided by Vue-Router, you need to install it through npm or yarn, reference and create a Vue-Router instance in the project. The following is a code example for introducing Vue-Router:

import Vue from 'vue'
import VueRouter from 'vue-router'

// 在Vue实例中使用VueRouter插件
Vue.use(VueRouter)

const router = new VueRouter({
  mode: 'history', // 使用HTML5 History模式，去掉URL中的#号
  routes: [
    {
      path: '/', // 路由路径
      component: Home // 组件，此处是Home组件
    },
    {
      path: '/about',
      component: About
    },
    // ...
  ]
})

// 在Vue实例中添加router选项
new Vue({
  router,
  render: h => h(App)
}).$mount('#app')

In the routing initialization code, we need to define the corresponding relationship between the routing path and the component so that we can jump correctly when clicking the link. If the routing information is incorrect or missing, the routing jump will be invalid. You can check whether the application's routes are initialized correctly through the route's hash table.

2. Try to manually jump the route

If the jump still cannot be achieved after the route is introduced, then we can try to manually jump the route. Manual jump allows the Vue instance to dynamically reset the route after the page rendering is completed to achieve the purpose of jump.

The sample code for manual jump routing is as follows:

export default {
  methods: {
    jumpTo(path) {
      this.$router.push({ path })
    }
  }
}

Define a jumpTo method in the existing Vue component, through the push of the route Method to implement jumping to the target route.

If the manual jump is successful, but the jump through the router-link tag fails, then you need to check whether the router-link tag is used correctly.

3. Checkrouter-link

router-link is the routing jump instruction provided by Vue-Router, use it You can easily jump to the target route. However, when using router-link, there may also be a jump failure problem. At this time, you need to check whether the usage of router-link is correct.

The following is a sample code for router-link:

<router-link to="/user">用户中心</router-link>

router-link’s to attribute specifies the jump The route to go to, its value should be a relative path or absolute path pointing to the target route.

If the routing path is correct, but router-link still cannot be redirected, you can consider using the native a tag instead of router-link , or check the compatibility issues between the router-link component and the Vue-Router version.

4. Check route navigation guard

In Vue-Router, route navigation guard can intercept route jumps and implement some customized functions, such as user authentication of routes, Permission verification, etc. During the development process, routing jumps may fail due to configuration issues with the navigation guard. Therefore, we also need to check the configuration of the route navigation guard.

Route navigation guards include beforeEach, beforeResolve and afterEach. These guards will be triggered before, between and after route switching. If the triggering timing and processing logic of the guard cannot be correctly configured, route jump may fail.

The following is a sample code for routing navigation guard:

router.beforeEach((to, from, next) => {
  if (to.path === '/login') {
    next()
    return
  }
  // 判断用户是否登录
  if (store.state.isLogin) {
    next()
    return
  }
  next('/login')
})

In this sample code, if the user jumps to the /login page, then jump directly, no Do any processing. If the user is not logged in, then jump to the login page.

If your route jump is useless, you can also check whether the navigation guard is configured correctly, or temporarily disable the guard during the debugging process to see if the problem can be solved.

Summary

Route jump is one of the common functions in web applications. As a commonly used routing solution in front-end frameworks, Vue-Router also has some common problems. This article introduces four reasons that may cause Vue routing jumps to be invalid.

Some common solutions include manually jumping routes, checking the usage of the router-link component and the configuration of the navigation guard for problems. If you encounter other routing jump-related problems, you can try different solutions based on the actual situation.

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