当前未启用对实验语法"jsx"的支持 [英] Support for the experimental syntax 'jsx' isn't currently enabled
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问题描述
我正在尝试运行非常简单的代码，但出现错误，我没有使用create react应用程序！
I'm trying to run very simple code, but I'm getting an error, I didn't use the create react app!
好像我的babel.config.js文件被忽略了！
It looks like my babel.config.js file is being ignored!
这是我的小项目的结构:
This is the structure of my small project:
我的html文件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>ReactJS</title>
</head>
<body>
<div id="app"></div>
<script src = 'bundle.js' ></script>
</body>
</html>
我的index.js文件:
My index.js file:
import React from 'react';
import { render } from 'react-dom';
render(<h1>Hello World!!</h1>, document.getElementById('app'));
我的包裹json:
{
"name": "front",
"version": "1.0.0",
"main": "index.js",
"license": "MIT",
"scripts": {
"dev": "webpack-dev-server --mode development",
"build": "webpack-dev-server --mode production"
},
"dependencies": {
"@babel/cli": "^7.10.5",
"@babel/core": "^7.10.5",
"@babel/plugin-proposal-class-properties": "^7.10.4",
"@babel/preset-env": "^7.10.4",
"@babel/preset-react": "^7.10.4",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"webpack": "^4.43.0",
"webpack-cli": "^3.3.12",
"webpack-dev-server": "^3.11.0"
},
"devDependencies": {
"@babel/plugin-transform-runtime": "^7.9.0",
"babel-loader": "^8.1.0",
"webpack-dev-server": "^3.10.3"
}
}
我的webpack.config.js
My webpack.config.js
const path = require('path');
module.exports = {
entry: path.resolve(__dirname, 'src', 'index.js'),
output: {
path: path.resolve(__dirname, 'public'),
filename: 'bundle.js'
},
devServer: {
contentBase: path.resolve(__dirname, 'public'),
},
module: {
rules: [{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader',
}
}]
},
};
这是我的babel.config.js
And this is my babel.config.js
module.exports = {
"presets": ["@babel/preset-env", "@babel/preset-react"]
};
发生错误
yarn webpack-dev-server --mode development
ERROR in ./src/index.js
Module build failed (from ./node_modules/babel-loader/lib/index.js):
SyntaxError: /root/treina/front/src/index.js: Support for the experimental syntax 'jsx' isn't currently enabled (4:8):
2 | import { render } from 'react-dom';
3 |
> 4 | render(<h1>Hello World!!</h1>, document.getElementById('app'));
| ^
Add @babel/preset-react (https://git.io/JfeDR) to the 'presets' section of your Babel config to enable transformation.
If you want to leave it as-is, add @babel/plugin-syntax-jsx (https://git.io/vb4yA) to the 'plugins' section to enable parsing.
at Parser._raise (/root/treina/front/node_modules/@babel/parser/lib/index.js:757:17)
at Parser.raiseWithData (/root/treina/front/node_modules/@babel/parser/lib/index.js:750:17)
at Parser.expectOnePlugin (/root/treina/front/node_modules/@babel/parser/lib/index.js:8849:18)
at Parser.parseExprAtom (/root/treina/front/node_modules/@babel/parser/lib/index.js:10170:22)
at Parser.parseExprSubscripts (/root/treina/front/node_modules/@babel/parser/lib/index.js:9688:23)
at Parser.parseMaybeUnary (/root/treina/front/node_modules/@babel/parser/lib/index.js:9668:21)
at Parser.parseExprOps (/root/treina/front/node_modules/@babel/parser/lib/index.js:9538:23)
at Parser.parseMaybeConditional (/root/treina/front/node_modules/@babel/parser/lib/index.js:9511:23)
at Parser.parseMaybeAssign (/root/treina/front/node_modules/@babel/parser/lib/index.js:9466:21)
at Parser.parseExprListItem (/root/treina/front/node_modules/@babel/parser/lib/index.js:10846:18)
ℹ ｢wdm｣: Failed to compile.
我正在使用纱线和WSL终端
I'm using yarn and the WSL terminal
推荐答案
只需创建一个 .babelrc 文件并添加:
Just create a .babelrc file and add:
{
"presets": ["@babel/preset-env", "@babel/preset-react"]
}
这篇关于当前未启用对实验语法"jsx"的支持的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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