我想在登录组件中添加一个css模块.现在,我在src / styles文件夹中有一个style.css样式表,它正在加载全局样式.但是现在,我想自定义登录组件,所以我将一个login.css文件添加到componentes / login中:
.button {
background-color: black;
}
我的LoginPage.js组件是:
import React from 'react';
import styles from './Login.css';
class LoginPage extends React.Component {
render() {
return (
<div className="jumbotron col-md-6 col-md-offset-3">
<div className="container">
<form name="form">
<div className="form-group">
<label htmlFor="username">Username</label>
<input type="text" name="username" className="form-control" required />
</div>
<div className="form-group">
<label htmlFor="password">Password</label>
<input type="password" name="password" className="form-control" required />
</div>
<div className="form-group">
<button className="btn btn-primary">Login</button>
</div>
</form>
</div>
</div>
);
}
}
export default LoginPage;
但我的webpack显示以下错误:
src\components\login\LoginPage.js (2/2)
✖ 2:20 Parse errors in imported module './Login.css': Unexpected token . (1:1) import/namespace
✖ 2:20 Parse errors in imported module './Login.css': Unexpected token . (1:1) import/default
! 2:20 Parse errors in imported module './Login.css': Unexpected token . (1:1) import/no-named-as-default
! 2:20 Parse errors in imported module './Login.css': Unexpected token . (1:1) import/no-named-as-default-member
这是我的webpack.config.js
import webpack from 'webpack';
import path from 'path';
export default {
debug: true,
devtool: 'inline-source-map',
noInfo: false,
entry: [
'eventsource-polyfill', // necessary for hot reloading with IE
'webpack-hot-middleware/client?reload=true', //note that it reloads the page if hot module reloading fails.
path.resolve(__dirname, 'src/index')
],
target: 'web',
output: {
path: __dirname + '/dist', // Note: Physical files are only output by the production build task `npm run build`.
publicPath: '/',
filename: 'bundle.js'
},
devServer: {
contentBase: path.resolve(__dirname, 'src')
},
plugins: [
new webpack.HotModuleReplacementPlugin(),
new webpack.NoErrorsPlugin()
],
module: {
loaders: [
{test: /\.js$/, include: path.join(__dirname, 'src'), loaders: ['babel']},
{test: /(\.css)$/, loaders: ['style', 'css']},
{test: /\.eot(\?v=\d+\.\d+\.\d+)?$/, loader: 'file'},
{test: /\.(woff|woff2)$/, loader: 'url?prefix=font/&limit=5000'},
{test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/, loader: 'url?limit=10000&mimetype=application/octet-stream'},
{test: /\.svg(\?v=\d+\.\d+\.\d+)?$/, loader: 'url?limit=10000&mimetype=image/svg+xml'}
]
}
};
最后,我尝试时遇到了问题:
<div className="form-group">
<button className=`${styles.button}`>Login</button>
</div>
src/components/login/LoginPage.js: JSX value should be eith
er an expression or a quoted JSX text (19:32)
如何设置css模块以正确反应?
编辑:
经过下面的讨论,我修复了加载类的错误:
<div className="form-group">
<button className={styles.button}>Login</button>
</div>
现在,加载了css但webpack仍然显示相同的错误和警告.
最佳答案 问题是你试图将实际的CSS导入你的JS而没有先完成转换到
ICSS
您的webpack加载器只需要为CSS模块设置.为此,您需要为本地化的类名添加模块和可选的模板.
将您的CSS加载器更改为:
{test: /(\.css)$/, loader: 'style!css?modules&importLoaders=1&localIdentName=[name]__[local]___[hash:base64:5]'}
这将告诉webpack在导入之前将CSS预编译到ICSS中,这变成了一个JS对象,告诉它如何将按钮类名称映射到动态本地化类名称字符串LoginPage__button___ab123
然后,您应该在第一次尝试时通过此导入的对象添加classNames,尽管除非添加多个类,否则不需要插值字符串
<button className={styles.button}>Login</button>