web优化 之 模块化引入

本文Demo的完整工程代码, 参考import-as-required-antd / import-as-required-lodash / import-as-required-date-fns

目录

• antd

  • 开始

  • 全部引入

  • 模块化引入

  • 优化

• lodash

  • 开始

  • 全部引入

  • 模块化引入

  • 优化

• date-fns

  • 开始

  • 全部引入

  • 模块化引入

  • 优化

antd

开始

dva new import-as-required-antd

npm run build

File sizes after gzip:

  88.61 KB  dist/index.js
  316 B     dist/index.css

全部引入

cnpm i --save antd

vim src/routes/IndexPage.js

import React from 'react';
import { connect } from 'dva';
import { Button } from 'antd';
import styles from './IndexPage.css';

function IndexPage() {
  return (
    

      Antd Button
    
  );
}

IndexPage.propTypes = {
};

export default connect()(IndexPage);

npm run build

File sizes after gzip:

  397.95 KB  dist/index.js
  316 B      dist/index.css

模块化引入

vim src/routes/IndexPage.js

import React from 'react';
import { connect } from 'dva';
import Button from 'antd/lib/button';
import 'antd/lib/button/style';
import styles from './IndexPage.css';

function IndexPage() {
  return (
    

      Antd Button
    
  );
}

IndexPage.propTypes = {
};

export default connect()(IndexPage);

npm run build

File sizes after gzip:

  90.51 KB  dist/index.js
  10.1 KB   dist/index.css

优化

npm i babel-plugin-import --save-dev

vim .roadhogrc

{
  "entry": "src/index.js",
  "env": {
    "development": {
      "extraBabelPlugins": [
        "dva-hmr",
        "transform-runtime",
        ["import", { "libraryName": "antd", "style": "css" }]
      ]
    },
    "production": {
      "extraBabelPlugins": [
        "transform-runtime",
        ["import", { "libraryName": "antd", "style": "css" }]
      ]
    }
  }
}

vim src/routes/IndexPage.js

import React from 'react';
import { connect } from 'dva';
import { Button } from 'antd';
import styles from './IndexPage.css';

function IndexPage() {
  return (
    

      Antd Button
    
  );
}

IndexPage.propTypes = {
};

export default connect()(IndexPage);

npm run build

File sizes after gzip:

  90.51 KB  dist/index.js
  10.1 KB   dist/index.css

关于babel-plugin-import详细介绍 参考ant-design/babel-plugin-import

lodash

开始

dva new import-as-required-lodash

npm run build

File sizes after gzip:

  88.61 KB  dist/index.js
  316 B     dist/index.css

全部引入

cnpm i --save lodash

vim src/routes/IndexPage.js

import React from 'react';
import { connect } from 'dva';
import _ from 'lodash';
import styles from './IndexPage.css';

function IndexPage() {
  const r = _.indexOf(['hello', 'world'], hello);
  console.log('lodash: ', r);

  return (
    

      
Yay! Welcome to dva!
      

      

        
To get started, edit src/index.js and save to reload.
        
Getting Started
      
    
  );
}

IndexPage.propTypes = {
}; 

export default connect()(IndexPage);

npm run build

File sizes after gzip:

  112.62 KB  dist/index.js
  316 B      dist/index.css

模块化引入

vim src/routes/IndexPage.js

import React from 'react';
import { connect } from 'dva';
import array from 'lodash/array';
import styles from './IndexPage.css';

function IndexPage() {
  const r = array.indexOf(['hello', 'world'], 'hello');
  console.log('lodash: ', r);

  return (
    

      
Yay! Welcome to dva!
      

      

        
To get started, edit src/index.js and save to reload.
        
Getting Started
      
    
  );
}

IndexPage.propTypes = {
};

export default connect()(IndexPage);

npm run build

File sizes after gzip:

  99.57 KB  dist/index.js
  316 B     dist/index.css

优化

cnpm i --save-dev babel-plugin-lodash

vim .roadhogrc

{
  "entry": "src/index.js",
  "env": {
    "development": {
      "extraBabelPlugins": [
        "dva-hmr",
        "transform-runtime",
        "lodash"
      ]
    },
    "production": {
      "extraBabelPlugins": [
        "transform-runtime",
        "lodash"
      ]
    }
  }
}

npm run build

File sizes after gzip:

  89.41 KB  dist/index.js
  316 B     dist/index.css

date-fns

开始

dva new import-as-required-date-fns

npm run build

File sizes after gzip:

  88.61 KB  dist/index.js
  316 B     dist/index.css

全部引入

cnpm i --save date-fns

vim src/routes/IndexPage.js

import React from 'react';
import { connect } from 'dva';
import { format } from 'date-fns';
import styles from './IndexPage.css';

function IndexPage() {
  return (
    

      {format(new Date(2017, 6, 6), 'MM/DD/YYYY')}
      
Yay! Welcome to dva!
      

      

        
To get started, edit src/index.js and save to reload.
        
Getting Started
      
    
  );
}

IndexPage.propTypes = {
};

export default connect()(IndexPage);

npm run build

File sizes after gzip:

  96.04 KB  dist/index.js
  316 B     dist/index.css

模块化引入

vim src/routes/IndexPage.js

import React from 'react';
import { connect } from 'dva';
import format from 'date-fns/format';
import styles from './IndexPage.css';

function IndexPage() {
  return (
    

      {format(new Date(2017, 6, 6), 'MM/DD/YYYY')}
      
Yay! Welcome to dva!
      

      

        
To get started, edit src/index.js and save to reload.
        
Getting Started
      
    
  );
}

IndexPage.propTypes = {
};

export default connect()(IndexPage);

npm run build

File sizes after gzip:

  91.46 KB  dist/index.js
  316 B     dist/index.css

优化

cnpm i --save-dev babel-plugin-date-fns

vim .roadhogrc

{
  "entry": "src/index.js",
  "env": {
    "development": {
      "extraBabelPlugins": [
        "dva-hmr",
        "transform-runtime",
        "date-fns"
      ]
    },
    "production": {
      "extraBabelPlugins": [
        "transform-runtime",
        "date-fns"
      ]
    }
  }
}

npm run build

File sizes after gzip:

  91.46 KB  dist/index.js
  316 B     dist/index.css

参考

• Tree Shaking

• Webpack 打包优化之体积篇

• 快速上手

• ant-design/babel-plugin-import

• Webpack按需打包Lodash的几种方式

• date-fns 轻量级的 JavaScript 日期库

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