Try to set up project with Vue and ElementUI using webpack4. I want to pull both Vue and ElementUI from CDN so I have below webpack config
module.exports = {
mode: "development",
entry: ["./app.js"],
externals: {
vue: "Vue",
"element-ui": "ElementUI"
},
module: {
rules: [
{
test: /.vue$/,
use: "vue-loader"
},
{
test: /.css$/,
use: ["style-loader", "css-loader"]
},
{
test: /.ttf$|.woff$/,
use: [{ loader: "url-loader", options: { limit: 10000 } }]
}
]
}
};
my html file
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
<title>Document</title>
<style>
[v-cloak] {
display: none;
}
</style>
</head>
<body>
<div v-cloak id="root">
</div>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.runtime.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/element-ui/2.3.4/index.js"></script>
<script src="./dist/main.js"></script>
</body>
</html>
my app.js has has root Vue instance
import Vue from "vue";
import ElementUI from "element-ui";
import Counter from "./Counter.vue";
Vue.use(ElementUI);
var app = new Vue({
el: "#root",
render: h => h(Counter)
});
Counter component is below
<script>
export default {
data() {
return {
counter: 0
};
},
methods: {
incement() {
this.counter++;
}
}
};
</script>
<template>
<div>
<p><span>Count: </span>{{counter}}</p>
<el-button @click="incement">Incement</el-button>
</div>
</template>
When i open the app in the browser I get below error
external_"ElementUI":1 Uncaught ReferenceError: ElementUI is not defined at this line in webpack generated js file module.exports = ElementUI;
is there something I am missing in this? Vue external works without any issues only having problems with the element UI
Your webpack configuration
"element-ui": "ElementUI"tells webpack that "element-ui" is available as a global variableElementUI.Webpack creates the code snippet
module.exports = ElementUI;so that whenever you import (or require w/e) "element-ui", it will return this global variable.Now it seems that
ElementUIdoes not exist in the global scope hence the ReferenceError.The script ...element-ui/2.3.4/index.js adds a global variable
Elementso try to change your webpack configuration with"element-ui": "Element"