我正在学习 React-JS。我写了一个简单的项目。但是当我运行“npm start”命令时出现错误。
我的 Webpack.config.js 文件如下--
<小时/>var webpack= require("webpack");
var path =require("path");
var DIST_DIR= path.resolve(__dirname,
"dist");
var SRC_DIR= path.resolve(__dirname,
"src");
var config={
entry: SRC_DIR + "/app/index.js",
output:{
path: DIST_DIR + "/app",
file: "bundle.js",
publicPath: "/app/"
},
module:{
loaders: [
{
test: /\.js?/,
include: SRC_DIR,
loader: "babel-loader",
query:{
presets: ["react",
"es2015", "stage-2"]
}
}
]
}
};
module.exports=config;
<小时/>
package.json 文件 --
<小时/>{
"name": "basic-reactjs",
"version": "1.0.0",
"description": "Some Basic ReactJS",
"main": "index.js",
"scripts": {
"start": "npm run build",
"build": "webpack -d && cp
src/index.html dist/index.html
&& webpack-dev-server --content-
base src/ --inline --hot",
"build:prod": "webpack -p && cp
src/index.html dist/index.html"
},
"keywords": [
"reactjs"
],
"author": "Numery Zaber",
"license": "MIT",
"dependencies": {
"react": "^16.6.3",
"react-dom": "^16.6.3"
},
"devDependencies": {
"babel-loader": "^8.0.4",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"babel-preset-stage-2": "^6.24.1",
"webpack": "^4.26.0",
"webpack-cli": "^3.1.2",
"webpack-dev-server": "^3.1.10"
}
<小时/>
通过以下命令安装Webpack
npm 安装 webpack webpack-dev-server babel-loader babel-preset-es2015 babel-preset-react babel-preset-stage-2 --save-dev
请帮我解决这个问题。
最佳答案
Webpack 4 中的架构现已更改。您已导入在旧版本 webpack 中工作的加载器。
了解更多详情:https://webpack.js.org/concepts/loaders/
var webpack= require("webpack");
var path =require("path");
var DIST_DIR= path.resolve(__dirname,
"dist");
var SRC_DIR= path.resolve(__dirname,
"src");
var config={
entry: SRC_DIR + "/app/index.js",
output:{
path: DIST_DIR + "/app",
filename: "bundle.js",
publicPath: "/app/"
},
module: {
rules: [
{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader',
options: {
presets: ["react","es2015", "stage-2"],
},
}
}
]
}
};
module.exports=config;
您还可以使用@babel/preset-env。
关于node.js - Webpack 已使用与 API 架构不匹配的配置对象进行初始化。 webpack 安装通过 "npm install webpack",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53405518/