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src

 
 

.browserslistrc

.browserslistrc

 
 

README.md

README.md

 
 

webpack.config.js

webpack.config.js

 
 

README.md

transpile-dependencies example

Usage example with configuration for dependencies transpilation.

  1. 🦔 Declare environments in .browserslistrc config like this:
defaults

[modern]
last 2 versions and last 1 year and not safari 12.1

[actual]
last 2 years and not last 2 versions
  1. 📝 Create webpack.config.js for multiple outputs:
function createWebpackConfig(env) {
    return {
        name:    env,
        /* ... */
        module:  {
            rules: [{
                test:    /\.js$/,
                exclude: /node_modules/,
                loader:  'babel-loader',
                options: {
                    cacheDirectory: true,
                    presets:        [
                        ['@babel/preset-env', {
                            modules:     false,
                            useBuiltIns: 'usage',
                            corejs:      3
                        }]
                    ],
                    plugins:        [/* ... */]
                }
            }]
        },
        plugins: [
            new HtmlWebpackPlugin({
                template: 'src/index.html',
                inject:   'head'
            })
        ]
    };
}
  1. ♻️ Add some tweaks to webpack.config.js for dependencies transpilation:
function createWebpackConfig(env) {
    return {
        name:    env,
        /* ... */
        resolve: {
            mainFields: [
                'raw',
                'browser',
                'module',
                'main'
            ],
            extensions: [
                '.babel.js',
                '.js',
                '.jsx',
                '.json'
            ]
        },
        module:  {
            rules: [{
                test:    /\.js$/,
                exclude: _ => /node_modules/.test(_) && !/\.babel\.js$/.test(_),
                loader:  'babel-loader',
                options: {
                    cacheDirectory: true,
                    presets:        [
                        ['@babel/preset-env', {
                            /* ... */
                            targets: getBrowserslistQueries({ env })
                        }]
                    ],
                    plugins:        [/* ... */]
                }
            }]
        },
        plugins: [
            new HtmlWebpackPlugin(/* ... */)
        ]
    };
}
  1. 🦄 Add bdsl-webpack-plugin:
const {
    BdslWebpackPlugin,
    getBrowserslistQueries,
    getBrowserslistEnvList
} = require('bdsl-webpack-plugin');

function createWebpackConfig(env) {
    return {
        name:    env,
        /* ... */
        module:  {
            rules: [{
                /* ... */
                loader:  'babel-loader',
                options: {
                    cacheDirectory: true,
                    presets:        [
                        ['@babel/preset-env', {
                            /* ... */
                            targets: getBrowserslistQueries({ env })
                        }]
                    ],
                    plugins:        [/* ... */]
                }
            }]
        },
        plugins: [
            new HtmlWebpackPlugin(/* ... */),
            new BdslWebpackPlugin({ env })
        ]
    };
}

module.exports = [
    ...getBrowserslistEnvList(),
    undefined // to use default .browserslistrc queries
].map(createWebpackConfig);
  1. 🎉 Done! Now index.html will contain differential script loading:
<!DOCTYPE html>
<html>
    <head>
        <title>Example</title>
        <script>function dsl(a,s,c,l,i){c=dsld.createElement('script');c.async=a[0];c.src=s;l=a.length;for(i=1;i<l;i++)c.setAttribute(a[i][0],a[i][1]);dslf.appendChild(c)}var dsld=document,dslf=dsld.createDocumentFragment(),dslu=navigator.userAgent,dsla=[[]];if(/((CPU[ +]OS|iPhone[ +]OS|CPU[ +]iPhone|CPU IPhone OS)[ +]+(13[_\.]0|13[_\.]([1-9]|\d{2,})|(1[4-9]|[2-9]\d|\d{3,})[_\.]\d+)(?:[_\.]\d+)?)|(SamsungBrowser\/(9\.2|9\.([3-9]|\d{2,})|([1-9]\d|\d{3,})\.\d+|10\.1|10\.([2-9]|\d{2,})|(1[1-9]|[2-9]\d|\d{3,})\.\d+))|(Edge\/(79|([8-9]\d|\d{3,}))(?:\.\d+)?)|(HeadlessChrome((?:\/79\.\d+\.\d+)?|(?:\/([8-9]\d|\d{3,})\.\d+\.\d+)?))|((Chromium|Chrome)\/(79|([8-9]\d|\d{3,}))\.\d+(?:\.\d+)?)|(Version\/(13|(1[4-9]|[2-9]\d|\d{3,}))\.\d+(?:\.\d+)?.*Safari\/)|(Firefox\/(68|(69|[7-9]\d|\d{3,})|71|(7[2-9]|[8-9]\d|\d{3,}))\.\d+\.\d+)|(Firefox\/(68|(69|[7-9]\d|\d{3,})|71|(7[2-9]|[8-9]\d|\d{3,}))\.\d+(pre|[ab]\d+[a-z]*)?)/.test(dslu))dsl(dsla[0],"/index.modern.js")
else if(/((CPU[ +]OS|iPhone[ +]OS|CPU[ +]iPhone|CPU IPhone OS)[ +]+(11[_\.]3|11[_\.]([4-9]|\d{2,})|(1[2-9]|[2-9]\d|\d{3,})[_\.]\d+|12[_\.]0|12[_\.]([1-9]|\d{2,})|12[_\.]4|12[_\.]([5-9]|\d{2,})|(1[3-9]|[2-9]\d|\d{3,})[_\.]\d+)(?:[_\.]\d+)?)|(SamsungBrowser\/(7\.2|7\.([3-9]|\d{2,})|7\.4|7\.([5-9]|\d{2,})|([8-9]|\d{2,})\.\d+|8\.2|8\.([3-9]|\d{2,})|(9|\d{2,})\.\d+))|(Edge\/(17|(1[8-9]|[2-9]\d|\d{3,}))(?:\.\d+)?)|(HeadlessChrome((?:\/65\.\d+\.\d+)?|(?:\/(6[6-9]|[7-9]\d|\d{3,})\.\d+\.\d+)?))|((Chromium|Chrome)\/(65|(6[6-9]|[7-9]\d|\d{3,}))\.\d+(?:\.\d+)?([\d.]+$|.*Safari\/(?![\d.]+ Edge\/[\d.]+$)))|(Version\/(11\.1|11\.([2-9]|\d{2,})|(1[2-9]|[2-9]\d|\d{3,})\.\d+|12\.0|12\.([1-9]|\d{2,})|(1[3-9]|[2-9]\d|\d{3,})\.\d+)(?:\.\d+)?.*Safari\/)|(Firefox\/(59|([6-9]\d|\d{3,}))\.\d+\.\d+)|(Firefox\/(59|([6-9]\d|\d{3,}))\.\d+(pre|[ab]\d+[a-z]*)?)/.test(dslu))dsl(dsla[0],"/index.actual.js")
else dsl(dsla[0],"/index.legacy.js");dsld.all[1].appendChild(dslf)</script>
    </head>
    <body></body>
</html>