react 后台（一） react + redux + react-route + webpack+ axios + antd + less

create-react-app 项目名称（项目失败，ant 的样式出不来）

项目技术栈

react + redux + react-route + webpack+ axios + less + antd

使用create-react-app 创建的项目默认不支持less，以下增加less配置的步骤

暴露配置文件
create-react-app生成的项目文，看不到webpack相关的配置文件，需要先暴露出来，使用如下命令即可：

npm run eject

安装less-loader 和 less

npm install less-loader less --save-dev

yarn less-loader less//这个执行不行

此时没有webpack.config.js文件，然后执行npm run eject暴露webpack.config.js文件，在config文件夹里（此操作不可逆）

运行后如果无法启动，执行 npm install

老版修改方式  
修改webpack配置
修改 webpack.config.dev.js 和 webpack.config-prod.js 配置文件

改动1：

/.css$/ 改为 /.(css|less)$/,, 修改后如下：

exclude: [
/.html$/,
/.(js|jsx)$/,
/.(css|less)$/,
/.json$/,
/.bmp$/,
/.gif$/,
/.jpe?g$/,
/.png$/,
],
改动2：

test: /.css$/ 改为 /.(css|less)$/

 新版修改方式

config文件此目录 webpack.config.js

1

// style files regexes
const cssRegex = /.css$/;
const cssModuleRegex = /.module.css$/;
const sassRegex = /.(scss|sass)$/;
const sassModuleRegex = /.module.(scss|sass)$/;

改为

// style files regexes
const cssRegex = /.(css|less)$/;
const cssModuleRegex = /.module.css$/;
const sassRegex = /.(scss|sass)$/;
const sassModuleRegex = /.module.(scss|sass)$/;

2

  // common function to get style loaders
  const getStyleLoaders = (cssOptions, preProcessor) => {
    const loaders = [
      isEnvDevelopment && require.resolve('style-loader'),
      isEnvProduction && {
        loader: MiniCssExtractPlugin.loader,
        options: shouldUseRelativeAssetPaths ? { publicPath: '../../' } : {},
      },
      {
        loader: require.resolve('css-loader'),
        options: cssOptions,
      },
      {

增加代码

  const getStyleLoaders = (cssOptions, preProcessor) => {
    const loaders = [
      isEnvDevelopment && require.resolve('style-loader'),
      isEnvProduction && {
        loader: MiniCssExtractPlugin.loader,
        options: shouldUseRelativeAssetPaths ? { publicPath: '../../' } : {},
      },
      {
        loader: require.resolve('css-loader'),
        options: cssOptions,
      },
      ,
      {
        loader: require.resolve('less-loader'),
        options: cssOptions,
      },

 先验证less是否可以

import './app.less';

不然刷新不行，就重启

如果antd引入的组件还是不展示样式

在引入的页面添加

import 'antd/dist/antd.css';

 刷新就能看到样式了

 如果想实现按需加载antd，需要引入

yarn add babel-plugin-import

修改 package.json，添加下面代码就可以去掉 import 'antd/dist/antd.css'; 了

  "babel": {
    "presets": [
      "react-app"
    ],
    "plugins": [
    ["import", { "libraryName": "antd", "libraryDirectory": "es", "style": "css" }]
    ]
  }

 在或者接着添加 customize-cra

yarn add customize-cra

创建文件 config-overrides.js

const { override, fixBabelImports } = require('customize-cra');
module.exports = override(
  fixBabelImports('import', {
    libraryName: 'antd',
    libraryDirectory: 'es',
    style: 'css',
  }),
);

然后重启运行

yarn add antd

yarn add axios

yarn add react-redux

yarn add react-router

yarn add react-router-dom

yarn add redux-immutable

yarn add react-router-redux

yarn add redux

yarn add redux-actions

yarn add redux-mock-store

yarn add redux-thunk

yarn add immutable

yarn add echarts

yarn add md5

yarn add rc-queue-anim

yarn add rc-tween-one

yarn add prop-types

如果会用的日期要再引入一个模块，用来格式化日期的

yarn add moment

如果有跨域请求

yarn add  fetch-jsonp

import { Select } from 'antd';
import jsonp from 'fetch-jsonp';
import querystring from 'querystring';

const { Option } = Select;

let timeout;
let currentValue;

function fetch(value, callback) {
  if (timeout) {
    clearTimeout(timeout);
    timeout = null;
  }
  currentValue = value;

  function fake() {
    const str = querystring.encode({
      code: 'utf-8',
      q: value,
    });
//这里
    jsonp(`https://suggest.taobao.com/sug?${str}`)
      .then(response => response.json())
      .then(d => {
        if (currentValue === value) {
          const { result } = d;
          const data = [];
          result.forEach(r => {
            data.push({
              value: r[0],
              text: r[0],
            });
          });
          callback(data);
        }
      });
  }

  timeout = setTimeout(fake, 300);
}

class SearchInput extends React.Component {
  state = {
    data: [],
    value: undefined,
  };

  handleSearch = value => {
    fetch(value, data => this.setState({ data }));
  };

  handleChange = value => {
    this.setState({ value });
  };

  render() {
    const options = this.state.data.map(d => <Option key={d.value}>{d.text}</Option>);
    return (
      <Select
        showSearch
        value={this.state.value}
        placeholder={this.props.placeholder}
        style={this.props.style}
        defaultActiveFirstOption={false}
        showArrow={false}
        filterOption={false}
        onSearch={this.handleSearch}
        onChange={this.handleChange}
        notFoundContent={null}
      >
        {options}
      </Select>
    );
  }
}

ReactDOM.render(<SearchInput placeholder="input search text" style={{  200 }} />, mountNode);