如何将的css文件导入Component.jsx文件

Question

我正试图像这样使用react day pickers组件，但我不知道如何导入.css文件，我一直收到错误：

Module parse failed: 
/Users/qliu/Documents/workspace/AppNexus/pricing_ui/contract-ui/app_contract-ui/node_modules/react-day-picker/lib/style.css Unexpected token (3:0)
You may need an appropriate loader to handle this file type.
SyntaxError: Unexpected token (3:0)

我的软件包.json中安装了"css-loader": "^0.19.0",这是我的日历.jsx文件：

import React from "react";
import DayPicker, { DateUtils } from "react-day-picker";
import "../../../node_modules/react-day-picker/lib/style.css"; // <==== ERROR ON THIS LINE
export default class Calender extends React.Component {
  state = {
    selectedDay: null
  };
  handleDayClick(e, day, modifiers) {
    if (modifiers.indexOf("disabled") > -1) {
      console.log("User clicked a disabled day.");
      return;
    }
    this.setState({
      selectedDay: day
    });
  }
  render() {
    // Add the `selected` modifier to the cell of the clicked day
    const modifiers = {
      disabled: DateUtils.isPastDay,
      selected: day => DateUtils.isSameDay(this.state.selectedDay, day)
    };
    return <DayPicker enableOutsideDays modifiers={ modifiers } onDayClick={ this.handleDayClick.bind(this) } />;
  }
}

这是我的webpack.config.js:

var path = require('path');
var webpack = require('webpack');
var settings = require('./src/server/config/settings');
var LessPluginAutoPrefix = require('less-plugin-autoprefix');
module.exports = {
    devtool: '#source-map',
    resolve: {
        extensions: ['', '.jsx', '.js']
    },
    entry: [
        'webpack-hot-middleware/client',
        './src/client/index.jsx'
    ],
    externals: {
        'react': 'React',
        'react-dom': 'ReactDOM',
        // to avoid duplicate import of React with react-addons-css-transition-group
        './React': 'React',
        './ReactDOM': 'ReactDOM',
        config: 'config'
    },
    output: {
        path: path.join(__dirname, 'public'),
        filename: 'bundle.js',
        publicPath: '/'
    },
    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoErrorsPlugin()
    ],
    lessLoader: {
        lessPlugins: [
            new LessPluginAutoPrefix({ browsers: ['last 2 versions'] })
        ]
    },
    module: {
        loaders: [{
            test: /.(js|jsx)$/,
            loaders: ['babel'],
            exclude: /node_modules/
        },
        {
            test: /.less$/,
            loader: 'style!css!less'
        },
        {
            test: /.json$/,
            loader: 'json-loader'
        }]
    }
};

Answer 1

您是如何编译的？如果是webpack，您可能需要引入样式加载器，并在webpack-config:的module.loaders数组中包含这样的内容

{
  test: /.css$/,
  loader: "style!css"
}

---

更新：现在提供了webpack.config.js，我们可以确认它需要更改module.loaders数组。OP使用较少的加载程序，并且只检查.less文件，因此确切的加载程序对象应该是：

{
  test: /.(less|css)$/,
  loader: 'style!css!less'
}

如@Q Liu所建议。保留原始部分，就好像有人在导入.css文件时出错一样，这很可能是他们所需要的。

Answer 2

我在我的webpack配置中使用了以下内容，它成功了：

test: /.css$/,
        use: [
          'style-loader',
          {
            loader: 'css-loader',
            options: {
              modules: true,
            },
          },
        ],

Answer 3

JSX不是CSS。在主HTML文件中，只需在CSS文件中添加一个<link>元素，React生成的DOM就会使用它。