React、babel、webpack 不解析 jsx 代码

Question

webpack.config.js

module.exports = {
  context: __dirname + "/app",
  entry: {
    javascript: "./app.js",
    html: "./index.html",
  },
  resolve: {
   extensions: ['', '.js', '.jsx']
 },
  output: {
    filename: "app.js",
    path: __dirname + "/dist",
  },
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: "babel-loader",
      },
      {
        test: /\.html$/,
        loader: "file?name=[name].[ext]",
      },
    ],
  },
}

package.json

{
  "name": "react-webpack-project",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel": "^6.0.15",
    "babel-core": "^6.0.20",
    "babel-loader": "^6.0.1",
    "file-loader": "^0.8.4",
    "webpack": "^1.12.2"
  },
  "dependencies": {
    "react": "^0.14.2"
  }
}

app/app.js

import React from "react";
import Greeting from "./greeting";

React.render(
  <Greeting name="World"/>,
  document.body
);

我在四处搜索后看到了完全相同的问题，但 none 的答案似乎适用于我。运行 webpack 时出现以下错误：

错误./app.js
模块构建失败：SyntaxError: path/to/project/react-webpack-project/app/app.js: Unexpected token (5:2)

React.render(
  <Greeting name="World"/>,
  document.body
);

我不确定为什么我仍然收到此错误。我猜它与我的 webpack.config.js 文件有关，但不是 100% 的问题所在。

Answer 1

首先：如果您使用的是 React v^0.14，则应使用 React-Dom 呈现您的代码。 https://www.npmjs.com/package/react-dom

其次，这应该可以解决您的问题：

Answer 2

您需要将预设添加到 babel-loader:

{
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: "babel-loader",
        presets: ['es2015', 'react']  
},

http://babeljs.io/docs/plugins/#presets

Answer 3

我目前使用的是 React 0.14.3。 ReactDOM 解决方案不起作用，也没有将 babel 预设添加到 webpack.config.js。基本上，这些解决方案似乎只有在定义了单个加载程序时才有效，但我同时拥有 babel-loader 和 react-hot 加载程序。

DID 的工作是安装 babel react 预设模块：

npm install babel-preset-react

然后使用以下内容在我的项目目录中创建一个 .babelrc 文件：

{
  "presets": ['react']
}

这记录在 http://babeljs.io/docs/plugins/preset-react/, as pointed to by Abhinav Singi

Answer 4

这帮助我解决了这个问题。

在同一目录 webpack.config.js 上创建新文件 .babelrc。将此添加到 .babelrc

  {
  "stage": 2,
  "env": {
    "development": {
      "plugins": [
        "react-display-name",
        "react-transform"
      ],
      "extra": {
        "react-transform": {
          "transforms": [{
            "transform": "react-transform-hmr",
            "imports": ["react"],
            "locals":  ["module"]
          }]
        }
      }
    }
  }
}

Answer 5

对我来说，答案是在查询块中包含预设：

query: {
  presets: ['react', 'es2015']
}

React、babel、webpack 不解析 jsx 代码

React, babel, webpack not parsing jsx code

javascript

node.js

reactjs

webpack

babeljs