Recently, I decided to dive into Vue.js as a way to revamp an existing frontend app that was originally built using Scala Play. My goal is to explore the world of component-based web design and enhance my skills in this area.
Initially, everything seemed to be loading smoothly on the first page I created. However, I wanted to take things a step further by implementing routing to enable multiple pages instead of just being confined to a single-page application. To achieve this, I installed vue-router through npm install vue-router --save and started following a tutorial that aligns with my vision: https://scotch.io/tutorials/how-to-build-a-simple-single-page-application-using-vue-2-part-1.
Despite what should have been a smooth transition, I encountered some obstacles along the way. Whenever I tried to load the components, nothing appeared on the screen, and a series of console errors greeted me:
[Vue warn]: Cannot find element: #app
[Vue warn]: Cannot find element: #app
[Vue warn]: Error in render: "TypeError: Cannot read property 'matched' of undefined"
found in
---> <App> at src/App.vue
<Root>
TypeError: Cannot read property 'matched' of undefined
at render (vue-router.esm.js?8c4f:76)
at createFunctionalComponent (vue.runtime.esm.js?2b0e:3033)
.... (etc)
I haven't included the full stack traces here, but I can provide them if necessary.
This is the snippet of code involved:
main.js
import Vue from 'vue'
import App from './App.vue'
import VueRouter from 'vue-router'
import Home from './components/Home.vue'
Vue.use(VueRouter)
const routes = [
{ path: '/', component: Home }
]
const router = new VueRouter({
routes
})
new Vue({
el: '#app',
template: '<App/>',
components: { App },
router
}).$mount('#app')
Vue.config.productionTip = false
new Vue({
render: h => h(App),
}).$mount('#app')
App.vue
<template>
<div>
<router-view></router-view>
</div>
</template>
<script>
export default {
name: 'app'
}
</script>
<style>
* {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
font-family: Arial, Helvetica, sans-serif;
line-height: 1.4;
background-color: aliceblue;
}
</style>
components/Home.vue
<template>
<div id="app">
<Header />
<Posts v-bind:posts="posts" />
</div>
</template>
<script>
import Posts from './Posts.vue'
import Header from './Header.vue'
export default {
name: 'home',
components: {
Header, Posts
},
data() {
return {
posts: []
}
}
}
</script>
<style>
</style>
If you think it's necessary, I can also include Header.vue and Posts.vue; initially, they were rendering without issues before I introduced vue-router into the picture.
Any insights or suggestions on how to resolve these persistent console errors are highly appreciated. I've scoured numerous resources and forums, all pointing towards basic troubleshooting steps like ensuring lowercase usage for router and routes, as well as attempting different import techniques such as
import Vue from 'vue/dist/vue.js'