我试图使用webpack和babel创建一个react应用,但是当我真正启动webpack开发服务器时,使用了以下方法 yarn run start
它显示以下错误:-
我使用的是babel-loader 8.1.0版本和@babelcore 7.10.2版本。
我的包.json:-
{
"name": "reactTemplate",
"version": "1.0.0",
"main": "index.js",
"license": "MIT",
"scripts": {
"start": "webpack-dev-server --mode development --open --hot",
"build": "webpack --mode production"
},
"dependencies": {
"react": "^16.13.1",
"react-dom": "^16.13.1"
},
"devDependencies": {
"babel-loader": "^8.1.0",
"@babel/core": "^7.10.2",
"@babel/preset-env": "^7.10.2",
"@babel/preset-react": "^7.10.1",
"html-webpack-plugin": "^4.3.0",
"webpack": "^4.43.0",
"webpack-cli": "^3.3.11",
"webpack-dev-server": "^3.11.0"
}
}
我的.babelrc:-
{
"presets": ["@babel/preset-env", "@babel/preset-react"]
}
我的webpack.config.js:-。
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
module.exports = {
entry: './src/index',
output: {
path: path.join(__dirname, './dist'),
filename: 'index_bundle.js',
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader',
},
},
],
},
plugins: [
new HtmlWebpackPlugin({
template: './src/index.html',
}),
],
};
如果你运行的是一个非常简单的hello world例子,扩展名是js,那么你的设置似乎没有问题。如果您使用的是jsx文件,请将此添加到webpack中。
test: /\.(js|jsx)$/,