`[WDS]断开` ReactJS，webpack
在运行yarn start之后，我会得到这个错误。我正在尝试开发一个由webpack和Babel开发的hello-word ReactJS应用程序。
[WDS] Disconnected! Content Security Policy: The page’s settings blocked the loading of a resource at http://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.12/semantic.min.css (“style-src”). Content Security Policy: The page’s settings blocked the loading of a resource at blob:http://localhost:3000/edcc77c5-a0d7-4b24-9f6d-5e740ffd77df (“style-src”).
这是我的webpack.config.js文件
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const port = process.env.PORT || 3000;
module.exports = {
mode: 'development',
entry: './src/index.js',
output: {
filename: 'bundle.[hash].js'
},
devtool: 'inline-source-map',
module: {
rules: [
{
test: /\.(js)$/,
exclude: /node_modules/,
use: ['babel-loader']
},
{
test: /\.css$/,
use: [
{
loader: 'style-loader'
},
{
loader: 'css-loader',
options: {
modules: true,
camelCase: true,
sourceMap: true
}
}
]
}
]
},
plugins: [
new HtmlWebpackPlugin({
template: 'public/index.html',
favicon: 'public/favicon.ico'
})
],
devServer: {
host: 'localhost',
port: port,
historyApiFallback: true,
open: true
}
};这是我的package.jon文件
{
"scripts": {
"start": "webpack-dev-server"
},
"dependencies": {
"react": "^16.2.0",
"react-dom": "^16.2.0",
"react-prop-types": "^0.4.0",
"react-router-dom": "^4.2.2",
"semantic-ui-react": "^0.79.0"
},
"devDependencies": {
"babel-core": "^6.26.0",
"babel-loader": "^7.1.4",
"babel-preset-env": "^1.6.1",
"babel-preset-react": "^6.24.1",
"babel-preset-stage-1": "^6.24.1",
"css-loader": "^0.28.11",
"html-webpack-plugin": "^3.1.0",
"style-loader": "^0.20.3",
"webpack": "^4.2.0",
"webpack-cli": "^2.0.13",
"webpack-dev-server": "^3.1.1"
}
}public/index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval'">
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.12/semantic.min.css"></link>
<title>webpack-for-react</title>
</head>
<body>
<div id="root"></div>
</body>
</html>我试着消除这个错误。但我做不到。如果有人有线索，请帮帮我。我认为这个错误来自于webpack.config.js文件。
回答 1
Stack Overflow用户
发布于 2018-03-27 06:03:34
问题在于您使用的Content-Security-Policy。
现在只允许本地css文件和内联样式。
当您尝试导入semantic.min.css时，cloudflare是不允许的主机。
所以你可能需要添加
<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' 'unsafe-inline' http://cdnjs.cloudflare.com; script-src 'self' 'unsafe-inline' 'unsafe-eval'">我建议你阅读CSP文档来了解更多。
并且在开发过程中尝试使用Content-Security-Policy-Report-Only，这样您就只能得到违规行为的报告。
https://stackoverflow.com/questions/49498437
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