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[英]Perf is not defined - running react app with webpack-dev-server
[英]Webpack dev server and react. Only get directory listing when running app
當我通過 webpack-dev-server 運行項目時,我在瀏覽器中看到的只是目錄列表。 我可以導航到文件並查看它們,但該應用程序實際上並未運行。
當我只運行 webpack 時,輸出文件的格式正確,所以我認為這不是問題。 我真的無法弄清楚問題可能是什么。
(webpack-dev-server 和 webpack 命令是通過添加到 package.json 中的腳本來運行的。你可以在下面的 package.json 文件中看到它)。
我已將項目分解為最簡單的形式。 它看起來像這樣:
應用程序.js
console.log("Hello");
包.json
{
"name": "my-app",
"version": "0.1.0",
"private": true,
"dependencies": {
"react": "^16.3.2",
"react-dom": "^16.3.2",
"react-scripts": "1.1.4",
"webpack-cli": "^2.1.3"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject",
"webpack": "webpack",
"webpack-dev-server": "webpack-dev-server --hot -inline"
},
"devDependencies": {
"babel-loader": "^7.1.4",
"file-loader": "^1.1.11",
"react-hot-loader": "^4.1.3",
"webpack": "^4.8.2",
"webpack-dev-server": "^3.1.4"
}
}
webpack.config.js
module.exports = {
context: __dirname + "/app",
entry: "./app.js",
output: {
filename: "app.js",
path: __dirname + "/dist",
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
loaders: ['babel-loader?presets[]=es2015,presets[]=react'],
},
],
},
mode: "development"
}
這是我運行命令時在終端中的輸出
npm run webpack-dev-server
> my-app@0.1.0 webpack-dev-server /home/chasmani/Documents/react/project
> webpack-dev-server --hot -inline
ℹ 「wds」: Project is running at http://localhost:8080/
ℹ 「wds」: webpack output is served from /
ℹ 「wdm」: Hash: 5a0c6d1388d655e14809
Version: webpack 4.8.2
Time: 1100ms
Built at: 2018-05-11 17:19:57
Asset Size Chunks Chunk Names
app.js 367 KiB javascript [emitted] javascript
Entrypoint main = app.js
[../node_modules/ansi-html/index.js] 4.16 KiB {javascript} [built]
[../node_modules/loglevel/lib/loglevel.js] 7.68 KiB {javascript} [built]
[../node_modules/webpack/hot sync ^\.\/log$] ../node_modules/webpack/hot sync nonrecursive ^\.\/log$ 170 bytes {javascript} [built]
[0] multi ../node_modules/webpack-dev-server/client?http://localhost:8080 webpack/hot/dev-server ./app.js 52 bytes {javascript} [built]
[../node_modules/sockjs-client/dist/sockjs.js] 176 KiB {javascript} [built]
[../node_modules/strip-ansi/index.js] 161 bytes {javascript} [built]
[../node_modules/url/url.js] 22.8 KiB {javascript} [built]
[../node_modules/webpack-dev-server/client/index.js?http://localhost:8080] ../node_modules/webpack-dev-server/client?http://localhost:8080 7.75 KiB {javascript} [built]
[../node_modules/webpack-dev-server/client/overlay.js] 3.58 KiB {javascript} [built]
[../node_modules/webpack-dev-server/client/socket.js] 1.05 KiB {javascript} [built]
[../node_modules/webpack/hot/dev-server.js] 1.66 KiB {javascript} [built]
[../node_modules/webpack/hot/emitter.js] 77 bytes {javascript} [built]
[../node_modules/webpack/hot/log-apply-result.js] 1.31 KiB {javascript} [built]
[../node_modules/webpack/hot/log.js] 1.03 KiB {javascript} [built]
[./app.js] 36 bytes {javascript} [built]
+ 13 hidden modules
ℹ 「wdm」: Compiled successfully.
我得到的只是文件系統。 誰有想法?
感謝哈姆斯,他發表了評論但沒有回答。
你得到目錄列表的原因是 webpack-dev-server 需要從 index.html 文件調用 js 文件。
html-webpack-plugin是生成這個 index.html 文件的一種方法。
我遇到了上面顯示的完全相同的問題,然后意識到我的問題是我正在從構建文件夾的外部運行服務命令“serve -s”。 那是錯的。 正確的方法是進入構建文件夾,然后從那里運行“serve -s”。
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