webpack4.X index.js加载了两次
按照webpack官网实践：
index.html
<!doctype html>
<html>
<head>
<title>webpack实践</title>
<meta charset="utf-8">
</head>
<body>
<script src="main.js"></script>
</body>
</html>src/index.js
import _ from 'lodash';
function component() {
var element = document.createElement('div');
// Lodash（目前通过一个 script 脚本引入）对于执行这一行是必需的
element.innerHTML = _.join(['Hello', 'webpack'], ' ');
return element;
}
document.body.appendChild(component());webpack.config.js
const path = require('path');
const htmlWebpackPlugin = require('html-webpack-plugin');
module.exports = {
entry: './src/index.js',
devServer:{
contentBase:'./dist'
},
plugins: [
// new htmlWebpackPlugin(),
new htmlWebpackPlugin({
filename:"index.html",
template:"index.html"
})
],
output: {
filename: 'main.js',
path: path.resolve(__dirname, 'dist')
}
};package.json
{
"name": "webpack-template",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "webpack-dev-server --open"
},
"repository": {
"type": "git",
"url": "git+https://github.com/DevilLittle/webpack-template.git"
},
"keywords": [],
"author": "",
"license": "ISC",
"devDependencies": {
"html-webpack-plugin": "^3.2.0",
"webpack": "^4.16.3",
"webpack-cli": "^3.1.0",
"webpack-dev-server": "^3.1.5"
},
"dependencies": {
"lodash": "^4.17.10"
}
}
然后神奇的事情就发生了：
问：为什么执行了两次？求大神告知
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评论（1）
<script src="main.js"></script> 既然你选择了htmlWebpackPlugin 这一句就是多余的了，
这样导致了你引了main.js两次，当然会有两次输出了