Vue template or render function not defined yet I am using neither?
JavascriptVuejs2Vue Componentvue.jsJavascript Problem Overview
This is my main javascript file:
import Vue from 'vue'
new Vue({
el: '#app'
});
My HTML file:
<body>
<div id="app"></div>
<script src="{{ mix('/js/app.js') }}"></script>
</body>
Webpack configuration of Vue.js with the runtime build:
alias: {
'vue$': 'vue/dist/vue.runtime.common.js'
}
I am still getting this well known error:
> [Vue warn]: Failed to mount component: template or render function not defined. (found in root instance)
How come when I don't even have a single thing inside my #app div where I mount Vue, I am still getting a render/template error? It says found in root but there is nothing to be found because it does not even have any content?
How am I suppose to mount if this does not work?
Edit:
I have tried it like this which seems to work:
new Vue(App).$mount('#app');
It make sense because using the el property implies you are 'scanning' that dom element for any components and it's useless because the runtime build does not have a compiler.
Still it is an extremely strange error message to throw, especially when I have my entire #app div emptied out.
Hopefully somebody could confirm my thoughts.
Javascript Solutions
Solution 1 - Javascript
In my case, I was getting the error because I upgraded from Laravel Mix Version 2 to 5.
In Laravel Mix Version 2, you import vue components as follows:
Vue.component(
'example-component',
require('./components/ExampleComponent.vue')
);
In Laravel Mix Version 5, you have to import your components as follows:
import ExampleComponent from './components/ExampleComponent.vue';
Vue.component('example-component', ExampleComponent);
Here is the documentation: https://laravel-mix.com/docs/5.0/upgrade
Better, to improve performance of your app, you can lazy load your components as follows:
Vue.component("ExampleComponent", () => import("./components/ExampleComponent"));
Solution 2 - Javascript
If you used to calle a component like this:
Vue.component('dashboard', require('./components/Dashboard.vue'));
I suppose that problem occurred when you update to laravel mix 5.0 or another libraries, so you have to put .default. As like below:
Vue.component('dashboard', require('./components/Dashboard.vue').default);
I solved the same problem.
Solution 3 - Javascript
The reason you're receiving that error is that you're using the runtime build which doesn't support templates in HTML files as seen here vuejs.org
In essence what happens with vue loaded files is that their templates are compile time converted into render functions where as your base function was trying to compile from your html element.
Solution 4 - Javascript
In my case, I imported my component (in router) as:
import bsw from 'common-mod/src/components/webcommon/webcommon'
It is simply solved if I changed it to
import bsw from 'common-mod/src/components/webcommon/webcommon.vue'
Solution 5 - Javascript
If someone else keeps getting the same error. Just add one extra div in your component template.
As the documentation says:
> Component template should contain exactly one root element
Check this simple example:
import yourComponent from '{path to component}'
export default {
components: {
yourComponent
},
}
// Child component
<template>
<div> This is the one! </div>
</template>
Solution 6 - Javascript
My previous code was
Vue.component('message', require('./components/message.vue'));
when i got such errors then i just add .default to it and it worked..
Vue.component('message', require('./components/message.vue').default);
Solution 7 - Javascript
In my case, I was using a default import:
import VueAutosuggest from 'vue-autosuggest';
Using a named import fixed it:
import {VueAutosuggest} from 'vue-autosuggest';
Solution 8 - Javascript
There is an update from Laravel Mix 3 to Laravel 4 which may affect the answer for all components.
See https://laravel-mix.com/docs/4.0/upgrade for more details.
Let 'example-component' be the example component, whose address is './components/ExampleComponent.vue'.
Laravel 3:
Vue.component('example-component', require('./components/ExampleComponent.vue'));
Laravel 4:
The change is that a .default is added.
Vue.component('example-component', require('./components/ExampleComponent.vue').default);
Solution 9 - Javascript
As a Summary of all the posts
This error: >[Vue warn]: Failed to mount component: template or render function not defined.
You're getting because of a certain problem that's preventing your component from being mounted.
This can be caused by a lot of different issues, as you can see from the different posts here. Debug your component thoroughly, and be aware of everything that is maybe not done correctly and might prevent the mount.
I was getting the error when my component file was not encoded correctly...
Solution 10 - Javascript
Something like this should resolve the issue..
Vue.component(
'example-component',
require('./components/ExampleComponent.vue').default);
Solution 11 - Javascript
I had this script in app.js in laravel which automatically adds all components in the component folder.
const files = require.context('./', true, /\.vue$/i)
files.keys().map(key => Vue.component(key.split('/').pop().split('.')[0], files(key)))
To make it work just add default
const files = require.context('./', true, /\.vue$/i)
files.keys().map(key => Vue.component(key.split('/').pop().split('.')[0], files(key).default))
Solution 12 - Javascript
I personally ran into the same error. None of the above solutions worked for me.
In fact, my component looks like this (in a file called my-component.js) :
Vue.component('my-component', {
data() {
return {
...
}
},
props: {
...
},
template:`
<div>
...
</div>
`
});
And I imported it like this in another component:
import MyComponent from '{path-to-folder}/my-component';
Vue.component('parent_component', {
components: {
MyComponent
}
});
The weird thing is that this worked in some components but not in this "parent_component". So what I had to do in the component itself was stock it in a variable and export it as default.
const MyComponent = Vue.component('my-component', {
data() {
return {
...
}
},
props: {
...
},
template:`
<div>
...
</div>
`
});
export default MyComponent;
It could seem obvious but as I said above, it works in 1 other component without this so I couldn't really understand why, but at least, this works everywhere now.
Solution 13 - Javascript
I cannot believe how did I fix the issue! weird solution!
I kept the app running then I removed all template tags and again I returned them back and it worked! but I don't understand what happened.
Solution 14 - Javascript
Make sure you import the .vue extension explicitly like so:
import myComponent from './my/component/my-component.vue';
If you don't add the .vue and you have a .ts file with the same name in that directory, for example, if you're separating the js/ts from the template and linking it like this inside of my-component.vue:
<script lang="ts" src="./my-component.ts"></script>
... then the import will bring in the .ts by default and so there really is no template or render function defined because it didn't import the .vue template.
When you tell it to use .vue in the import, then it finds your template right away.
Solution 15 - Javascript
I am using Typescript with vue-property-decorator and what happened to me is that my IDE auto-completed "MyComponent.vue.js" instead of "MyComponent.vue". That got me this error.
It seems like the moral of the story is that if you get this error and you are using any kind of single-file component setup, check your imports in the router.
Solution 16 - Javascript
When used with storybook and typescirpt, I had to add
> .storybook/webpack.config.js
const path = require('path');
module.exports = async ({ config, mode }) => {
config.module.rules.push({
test: /\.ts$/,
exclude: /node_modules/,
use: [
{
loader: 'ts-loader',
options: {
appendTsSuffixTo: [/\.vue$/],
transpileOnly: true
},
}
],
});
return config;
};
Solution 17 - Javascript
I'll add this here b/c there seem to be a number of different reasons why this very frustrating error can appear. In my case, it was a question of syntax in my import statement. I had
import DataTable from '@/components/data-table/DataTable';
when I should have had
import DataTable from '@/components/data-table/';
Your project setup and configuration may vary but if you're getting this error I suggest that you check that the import syntax for your component is as expected for your project.
Solution 18 - Javascript
in my case, it worked for me
const routes = [
{ path: '/dashboard', component: require('./components/Dashboard.vue').default },
{ path: '/profile', component: require('./components/Profile.vue').default }]
Solution 19 - Javascript
This error was for me because of wrong import
instead
components: {
MyComp: import('./MyComp.vue'),
}
write
components: {
MyComp: () => import('./MyComp.vue'),
}
Solution 20 - Javascript
You are missing the <template> tag for the HTML part.
Solution 21 - Javascript
> Try adding .default in you require component
let routes = [{
path: '/dashboard',
component: require('./components/Dashboard.vue').default
}
]
Solution 22 - Javascript
let allSalary = require('./components/salary/index.vue');
instead use this
let allSalary = require('./components/salary/index.vue').default;
Solution 23 - Javascript
I got same error before I forgot to enclose component content in template element.
I have this initially
import Vue from 'vue';
import VueRouter from 'vue-router';
import Home from './com/Home.vue';
Vue.use(VueRouter);
Vue.router = new VueRouter({
mode: 'history',
routes: [
{
path: '/',
name: 'home',
component: Home
},
]
});
Then in Home.vue I have:
<h1>Hello Vue</h1>
Hence the error:
Failed to mount component: template or render function not defined.
found in
---> <Home> at resources/js/com/Home.vue
<Root>
Enclosing in element fixed the error:
<template>
<h1>Hello Vue</h1>
</template>
Solution 24 - Javascript
Yet another idea to throw in to the mix... In my case, the component throwing the error was a template-less component with a custom render() function. I couldn't see why it wasn't working, until I realised that I hadn't put <script>...</script> tags around the code in the component (seemed unnecessary, since I had no template or style tags either). Not sure why this got past the compiler...?
Either way... make sure you use your <script> tags ;-)
Solution 25 - Javascript
Similar issue here in my visual.ts file i had to change:
import { createApp } from 'vue'
import Visual from './Visual.vue'
- const app = createApp({Visual}).mount('#visual')
+ const app = createApp(Visual).mount('#visual')
Solution 26 - Javascript
<template><div></div></template>
In my case ,my child component was blank ! And i was importing it in parent component without any template,script or style(complete blank child.vue file). So i just added above template in my child component and its working fine.
Solution 27 - Javascript
That was a mistake when I worked at Laravel. The code that worked for me
//require('./bootstrap');
window.axios = require('axios');
window.axios.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest';
window.Vue = require('vue');
import Vue from 'vue'
Vue.component('dictionary-index', () => import('./components/DictionaryIndex.vue'));
Vue.component('dictionary-create', () => import('./components/DictionaryCreate.vue'));
Vue.component('dictionary-cat', () => import('./components/DictionaryCategory.vue'));
const app = new Vue({
el: '#app',
});
Solution 28 - Javascript
I solved this by removing the node_modules directory and run npm install and npm run dev again.