网页包+;反应16+;Javascript ES6“;意外标记“;错误
我知道这个问题被问了上千次,但我没有找到任何有效的解决办法。我还是会犯同样的错误。以下是我的配置文件: package.json:网页包+;反应16+;Javascript ES6“;意外标记“;错误,javascript,reactjs,webpack,babeljs,Javascript,Reactjs,Webpack,Babeljs,我知道这个问题被问了上千次,但我没有找到任何有效的解决办法。我还是会犯同样的错误。以下是我的配置文件: package.json: { "scripts": { "start": "webpack-dev-server", "build": "webpack" }, "dependencies": { "jquery": "^3.2.1", "react": "^16.1.1", "react
{
"scripts": {
"start": "webpack-dev-server",
"build": "webpack"
},
"dependencies": {
"jquery": "^3.2.1",
"react": "^16.1.1",
"react-dom": "^16.1.1"
},
"devDependencies": {
"babel": "^6.23.0",
"babel-cli": "^6.26.0",
"babel-core": "^6.26.0",
"babel-loader": "^7.1.2",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"babel-preset-stage-0": "^6.24.1",
"clean-webpack-plugin": "^0.1.17",
"css-loader": "^0.28.7",
"html-webpack-plugin": "^2.30.1",
"style-loader": "^0.19.0",
"webpack": "^3.8.1",
"webpack-dev-server": "^2.9.4"
}
}
webpack.config.js:
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
module.exports = {
entry: './src/app/app.jsx',
devtool: 'source-map',
devServer: {
contentBase: path.join(__dirname, "dist"),
hot: true
},
module: {
rules: [
{
test: /\.css$/,
use: [
'style-loader',
'css-loader'
]
}
],
loaders: [
{
test: /\.jsx?$/,
exclude: /node_modules/,
loader: "babel-loader",
query:
{
presets: ['es2015', 'react']
}
}
]
},
plugins: [
new HtmlWebpackPlugin({
template: './src/app/index.html'
}),
new webpack.NamedModulesPlugin(),
new webpack.HotModuleReplacementPlugin()
],
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'app.bundle.js'
}
};
app.jsx:
import React from "react"
React.render(<h1>hello world</h1>, document.getElementById("root-component"));
从“React”导入React
render(helloworld,document.getElementById(“根组件”);
Webpack引发以下错误:
ERROR in ./src/app/app.jsx
Module parse failed: Unexpected token (3:13)
You may need an appropriate loader to handle this file type.
| import React from "react"
|
| React.render(<h1>hello world</h1>, document.getElementById("root-component"));
./src/app/app.jsx中的错误
模块分析失败:意外令牌(3:13)
您可能需要适当的加载程序来处理此文件类型。
|从“React”导入React
|
|render(helloworld,document.getElementById(“根组件”);
我尝试了多种解决方案(比如添加带有预设的.babelrc文件),但没有任何效果。有任何帮助吗?根据webpack v3,您的webpack.config.js不正确 您需要在
规则
数组中添加另一个条目,就像加载CSS一样。此外,
query
应重命名为options
有关从v2迁移到v3的更多信息,请参阅
固定的webpack.config.js
如下所示:
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
module.exports = {
entry: './src/app/app.jsx',
devtool: 'source-map',
devServer: {
contentBase: path.join(__dirname, "dist"),
hot: true
},
module: {
rules: [
{
test: /\.jsx?$/,
exclude: /node_modules/,
use: [
{
loader: "babel-loader",
options: {
presets: ['es2015', 'react']
}
}
]
},
{
test: /\.css$/,
use: [
'style-loader',
'css-loader'
],
}
],
},
plugins: [
new HtmlWebpackPlugin({
template: './src/app/index.html'
}),
new webpack.NamedModulesPlugin(),
new webpack.HotModuleReplacementPlugin()
],
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'app.bundle.js'
}
};
之前:
./src/app/app.jsx中出错
模块分析失败:意外令牌(3:13)
Ater(正确创建的捆绑包):
app.bundle.js 424 kB 0[emissed][big]main
app.bundle.js.map 499 kB 0[emissed]main
您是否尝试过从“react dom”导入react dom,而不是使用react
在浏览器中呈现应用程序?是的,我尝试过。同样的结果。根据React文档,您必须使用ReactDOM.render
。当然,正如@AranS已经建议的,您还必须使用从“react dom”导入ReactDOM
(注意ReactDOM只是一个名称)。您有.babelrc
?