我是反应的初学者，我尝试创建一个网页，为此我在此链接后创建了一个新的反应应用https://github.com/facebookincubator/create-react-app。
还在此链接后安装了一个webpack：
https://www.davidmeents.com/blog/journey-into-react-part-2-creating-your-first-react-app/
首先安装了反应
C:\Users\siddhi jambhale\Desktop\react-demo>npm install react --save
my-app@0.1.0 C:\Users\siddhi jambhale\Desktop\react-demo
`-- react@15.5.4
然后安装react-demo
C:\Users\siddhi jambhale\Desktop\react-demo>npm install react-dom --save
my-app@0.1.0 C:\Users\siddhi jambhale\Desktop\react-demo
`-- react-dom@15.5.4
然后创建了webpack.config.js
var webpack = require('webpack');
module.exports = {
context: __dirname,
entry: "./src/index.js",
module: {
loaders: [
{
test: /\.js|.jsx?$/,
exclude: /(node_modules|bower_components)/,
loader: 'babel-loader',
query: {
presets: ['react', 'es2015', 'stage-2'],
plugins: ['react-html-attrs', 'transform-class-properties',
'transform-decorators-legacy']
}
}
]
},
output: {
path: __dirname,
filename: "bundle.js"
}
};
然后安装webpack我输出如下：
C:\Users\siddhi jambhale\Desktop\react-demo>npm install webpack webpack-dev-server --save-dev
my-app@0.1.0 C:\Users\siddhi jambhale\Desktop\react-demo
+-- webpack@2.5.1
| +-- acorn@5.0.3
| +-- acorn-dynamic-import@2.0.2
| | `-- acorn@4.0.11
| +-- ajv@4.11.8
| | +-- co@4.6.0
| | `-- json-stable-stringify@1.0.1
| | `-- jsonify@0.0.0
| +-- ajv-keywords@1.5.1
| +-- async@2.4.0
| | `-- lodash@4.17.4
| +-- enhanced-resolve@3.1.0
| | `-- graceful-fs@4.1.11
| +-- interpret@1.0.3
| +-- json-loader@0.5.4
| +-- json5@0.5.1
| +-- loader-runner@2.3.0
| +-- loader-utils@0.2.17
| | +-- big.js@3.1.3
| | `-- emojis-list@2.1.0
| +-- memory-fs@0.4.1
| | +-- errno@0.1.4
| | | `-- prr@0.0.0
| | `-- readable-stream@2.2.9
| | +-- buffer-shims@1.0.0
| | +-- core-util-is@1.0.2
| | +-- isarray@1.0.0
| | +-- process-nextick-args@1.0.7
| | +-- string_decoder@1.0.0
| | `-- util-deprecate@1.0.2
| +-- mkdirp@0.5.1
| | `-- minimist@0.0.8
| +-- node-libs-browser@2.0.0
| | +-- assert@1.4.1
| | +-- browserify-zlib@0.1.4
| | | `-- pako@0.2.9
| | +-- buffer@4.9.1
| | | +-- base64-js@1.2.0
| | | `-- ieee754@1.1.8
| | +-- console-browserify@1.1.0
| | | `-- date-now@0.1.4
| | +-- constants-browserify@1.0.0
| | +-- crypto-browserify@3.11.0
| | | +-- browserify-cipher@1.0.0
| | | | +-- browserify-aes@1.0.6
| | | | | `-- buffer-xor@1.0.3
| | | | +-- browserify-des@1.0.0
| | | | | `-- des.js@1.0.0
| | | | `-- evp_bytestokey@1.0.0
| | | +-- browserify-sign@4.0.4
| | | | +-- bn.js@4.11.6
| | | | +-- browserify-rsa@4.0.1
| | | | +-- elliptic@6.4.0
| | | | | +-- brorand@1.1.0
| | | | | +-- hash.js@1.0.3
| | | | | +-- hmac-drbg@1.0.1
| | | | | `-- minimalistic-crypto-utils@1.0.1
| | | | `-- parse-asn1@5.1.0
| | | | `-- asn1.js@4.9.1
| | | +-- create-ecdh@4.0.0
| | | +-- create-hash@1.1.3
| | | | +-- cipher-base@1.0.3
| | | | +-- ripemd160@2.0.1
| | | | | `-- hash-base@2.0.2
| | | | `-- sha.js@2.4.8
| | | +-- create-hmac@1.1.6
| | | | `-- safe-buffer@5.0.1
| | | +-- diffie-hellman@5.0.2
| | | | `-- miller-rabin@4.0.0
| | | +-- pbkdf2@3.0.12
| | | +-- public-encrypt@4.0.0
| | | `-- randombytes@2.0.3
| | +-- domain-browser@1.1.7
| | +-- events@1.1.1
| | +-- https-browserify@0.0.1
| | +-- os-browserify@0.2.1
| | +-- path-browserify@0.0.0
| | +-- process@0.11.10
| | +-- punycode@1.4.1
| | +-- querystring-es3@0.2.1
| | +-- stream-browserify@2.0.1
| | +-- stream-http@2.7.1
| | | +-- builtin-status-codes@3.0.0
| | | +-- to-arraybuffer@1.0.1
| | | `-- xtend@4.0.1
| | +-- string_decoder@0.10.31
| | +-- timers-browserify@2.0.2
| | +-- tty-browserify@0.0.0
| | +-- url@0.11.0
| | | +-- punycode@1.3.2
| | | `-- querystring@0.2.0
| | +-- util@0.10.3
| | | `-- inherits@2.0.1
| | `-- vm-browserify@0.0.4
| | `-- indexof@0.0.1
| +-- source-map@0.5.6
| +-- supports-color@3.2.3
| | `-- has-flag@1.0.0
| +-- tapable@0.2.6
| +-- uglify-js@2.8.23
| | +-- uglify-to-browserify@1.0.2
| | `-- yargs@3.10.0
| | +-- camelcase@1.2.1
| | +-- cliui@2.1.0
| | | +-- center-align@0.1.3
| | | | +-- align-text@0.1.4
| | | | | +-- longest@1.0.1
| | | | | `-- repeat-string@1.6.1
| | | | `-- lazy-cache@1.0.4
| | | +-- right-align@0.1.3
| | | `-- wordwrap@0.0.2
| | `-- window-size@0.1.0
| +-- watchpack@1.3.1
| +-- webpack-sources@0.2.3
| | `-- source-list-map@1.1.2
| `-- yargs@6.6.0
| +-- camelcase@3.0.0
| +-- cliui@3.2.0
| | `-- wrap-ansi@2.1.0
| +-- decamelize@1.2.0
| +-- get-caller-file@1.0.2
| +-- os-locale@1.4.0
| | `-- lcid@1.0.0
| | `-- invert-kv@1.0.0
| +-- read-pkg-up@1.0.1
| | +-- find-up@1.1.2
| | | `-- path-exists@2.1.0
| | `-- read-pkg@1.1.0
| | +-- load-json-file@1.1.0
| | | +-- parse-json@2.2.0
| | | | `-- error-ex@1.3.1
| | | | `-- is-arrayish@0.2.1
| | | +-- pify@2.3.0
| | | `-- strip-bom@2.0.0
| | | `-- is-utf8@0.2.1
| | +-- normalize-package-data@2.3.8
| | | +-- hosted-git-info@2.4.2
| | | +-- is-builtin-module@1.0.0
| | | | `-- builtin-modules@1.1.1
| | | +-- semver@5.3.0
| | | `-- validate-npm-package-license@3.0.1
| | | +-- spdx-correct@1.0.2
| | | | `-- spdx-license-ids@1.2.2
| | | `-- spdx-expression-parse@1.0.4
| | `-- path-type@1.1.0
| +-- require-directory@2.1.1
| +-- require-main-filename@1.0.1
| +-- set-blocking@2.0.0
| +-- string-width@1.0.2
| | +-- code-point-at@1.1.0
| | `-- is-fullwidth-code-point@1.0.0
| | `-- number-is-nan@1.0.1
| +-- which-module@1.0.0
| +-- y18n@3.2.1
| `-- yargs-parser@4.2.1
| `-- camelcase@3.0.0
`-- webpack-dev-server@2.4.5
+-- ansi-html@0.0.7
+-- chokidar@1.7.0
| +-- anymatch@1.3.0
| | `-- arrify@1.0.1
| +-- async-each@1.0.1
| +-- glob-parent@2.0.0
| +-- inherits@2.0.3
| +-- is-binary-path@1.0.1
| | `-- binary-extensions@1.8.0
| +-- is-glob@2.0.1
| | `-- is-extglob@1.0.0
| +-- path-is-absolute@1.0.1
| `-- readdirp@2.1.0
| +-- minimatch@3.0.4
| | `-- brace-expansion@1.1.7
| | +-- balanced-match@0.4.2
| | `-- concat-map@0.0.1
| `-- set-immediate-shim@1.0.1
+-- compression@1.6.2
| +-- accepts@1.3.3
| | `-- negotiator@0.6.1
| +-- bytes@2.3.0
| +-- compressible@2.0.10
| | `-- mime-db@1.27.0
| +-- debug@2.2.0
| | `-- ms@0.7.1
| +-- on-headers@1.0.1
| `-- vary@1.1.1
+-- connect-history-api-fallback@1.3.0
+-- express@4.15.2
| +-- array-flatten@1.1.1
| +-- content-disposition@0.5.2
| +-- content-type@1.0.2
| +-- cookie@0.3.1
| +-- cookie-signature@1.0.6
| +-- debug@2.6.1
| | `-- ms@0.7.2
| +-- depd@1.1.0
| +-- encodeurl@1.0.1
| +-- escape-html@1.0.3
| +-- etag@1.8.0
| +-- finalhandler@1.0.2
| | +-- debug@2.6.4
| | | `-- ms@0.7.3
| | `-- unpipe@1.0.0
| +-- fresh@0.5.0
| +-- merge-descriptors@1.0.1
| +-- methods@1.1.2
| +-- on-finished@2.3.0
| | `-- ee-first@1.1.1
| +-- parseurl@1.3.1
| +-- path-to-regexp@0.1.7
| +-- proxy-addr@1.1.4
| | +-- forwarded@0.1.0
| | `-- ipaddr.js@1.3.0
| +-- qs@6.4.0
| +-- range-parser@1.2.0
| +-- send@0.15.1
| | +-- debug@2.6.1
| | +-- destroy@1.0.4
| | +-- http-errors@1.6.1
| | `-- ms@0.7.2
| +-- serve-static@1.12.1
| +-- setprototypeof@1.0.3
| +-- statuses@1.3.1
| +-- type-is@1.6.15
| | `-- media-typer@0.3.0
| `-- utils-merge@1.0.0
+-- html-entities@1.2.1
+-- http-proxy-middleware@0.17.4
| +-- http-proxy@1.16.2
| | +-- eventemitter3@1.2.0
| | `-- requires-port@1.0.0
| +-- is-glob@3.1.0
| | `-- is-extglob@2.1.1
| `-- micromatch@2.3.11
| +-- arr-diff@2.0.0
| | `-- arr-flatten@1.0.3
| +-- array-unique@0.2.1
| +-- braces@1.8.5
| | +-- expand-range@1.8.2
| | | `-- fill-range@2.2.3
| | | +-- is-number@2.1.0
| | | +-- isobject@2.1.0
| | | `-- randomatic@1.1.6
| | +-- preserve@0.2.0
| | `-- repeat-element@1.1.2
| +-- expand-brackets@0.1.5
| | `-- is-posix-bracket@0.1.1
| +-- extglob@0.3.2
| +-- filename-regex@2.0.1
| +-- kind-of@3.2.0
| | `-- is-buffer@1.1.5
| +-- normalize-path@2.1.1
| | `-- remove-trailing-separator@1.0.1
| +-- object.omit@2.0.1
| | +-- for-own@0.1.5
| | | `-- for-in@1.0.2
| | `-- is-extendable@0.1.1
| +-- parse-glob@3.0.4
| | +-- glob-base@0.3.0
| | `-- is-dotfile@1.0.2
| `-- regex-cache@0.4.3
| +-- is-equal-shallow@0.1.3
| `-- is-primitive@2.0.0
+-- opn@4.0.2
| `-- pinkie-promise@2.0.1
| `-- pinkie@2.0.4
+-- portfinder@1.0.13
| `-- async@1.5.2
+-- serve-index@1.8.0
| +-- batch@0.5.3
| +-- http-errors@1.5.1
| | `-- setprototypeof@1.0.2
| `-- mime-types@2.1.15
+-- sockjs@0.3.18
| +-- faye-websocket@0.10.0
| | `-- websocket-driver@0.6.5
| | `-- websocket-extensions@0.1.1
| `-- uuid@2.0.3
+-- sockjs-client@1.1.2
| +-- eventsource@0.1.6
| | `-- original@1.0.0
| | `-- url-parse@1.0.5
| | `-- querystringify@0.0.4
| +-- faye-websocket@0.11.1
| +-- json3@3.3.2
| `-- url-parse@1.1.9
| `-- querystringify@1.0.0
+-- spdy@3.4.4
| +-- handle-thing@1.2.5
| +-- http-deceiver@1.2.7
| +-- select-hose@2.0.0
| `-- spdy-transport@2.0.18
| +-- hpack.js@2.1.6
| +-- obuf@1.1.1
| `-- wbuf@1.7.2
| `-- minimalistic-assert@1.0.0
+-- strip-ansi@3.0.1
| `-- ansi-regex@2.1.1
`-- webpack-dev-middleware@1.10.2
`-- mime@1.3.4
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.1: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
但我看不到bundle.js的生成。
如果我运行index.html，我看不到任何东西，只有一个空白页。
的index.html
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!--
Notice the use of %PUBLIC_URL% in the tag above.
It will be replaced with the URL of the `public` folder during the build.
Only files inside the `public` folder can be referenced from the HTML.
Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
work correctly both with client-side routing and a non-root public URL.
Learn how to configure a non-root public URL by running `npm run build`.
-->
<title>React App</title>
</head>
<body>
<div id="root"></div>
<!--
This HTML file is a template.
If you open it directly in the browser, you will see an empty page.
You can add webfonts, meta tags, or analytics to this file.
The build step will place the bundled scripts into the <body> tag.
To begin the development, run `npm start`.
To create a production bundle, use `npm run build`.
-->
<script src="/my-app/src/App.js"></script>
</body>
</html>
App.js
import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';
class App extends Component {
render() {
return (
<div className="App">
<div className="App-header">
<img src={logo} className="App-logo" alt="logo" />
<h2>Welcome to React</h2>
</div>
<p className="App-intro">
To get started, edit <code>src/App.js</code> and save to reload.
</p>
</div>
);
}
}
ReactDOM.render( <App />, document.getElementById('root') )
export default App;
的package.json
{
"name": "my-app",
"version": "0.1.0",
"private": true,
"dependencies": {
"react": "^15.5.4",
"react-dom": "^15.5.4"
},
"devDependencies": {
"babel-loader": "^7.0.0",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"babel-preset-stage-2": "^6.24.1",
"react-scripts": "0.9.5",
"webpack": "^2.5.1",
"webpack-dev-server": "^2.4.5"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"dev": "webpack-dev-server --inline --hot",
"eject": "react-scripts eject"
}
}
这里出了什么问题？请帮忙。谢谢..
编辑：我试图运行webpack我收到错误：
C:\Users\siddhi jambhale\Desktop\react-demo>npm run webpack
npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "webpack"
npm ERR! node v7.10.0
npm ERR! npm v4.2.0
npm ERR! missing script: webpack
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR! <https://github.com/npm/npm/issues>
npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\siddhi jambhale\AppData\Roaming\npm-cache\_logs\2017-05-13T05_35_36_577Z-debug.log
当我安装webpack或运行它时，bundle.js没有得到创建。
index.js
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';
import './index.css';
ReactDOM.render(
<App />,
document.getElementById('root')
);
答案 0 :(得分：0)
您忘了将bundle.js文件包含在index.html中，请按以下方式编写：
<body>
<div id="root"></div>
<script src="bundle.js"></script>
</body>
原因：检查webpack config file：
output: {
path: __dirname,
filename: "bundle.js"
}
当您运行webpack时，它会创建一个包含所有代码的输出文件bundle.js，您需要将该文件包含在index.html中。