Package Exports

@mrhenry/babel-plugin-core-web

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Readme

babel-plugin-core-web

Babel plugin that polyfills browser features.

Bringing polyfill.io to your babel flow.

why

Maintaining a correct but minimal polyfill bundle from polyfill.io is a manual process and prone to errors. Babel however knows which features you actually used and the environment you are targetting. Bringing the two together works for us, we hope it does for you too.

What is not included is a way to serve different bundles to different browsers. There are many ways to do this and we are working on some recipes for this.

install

npm install --save-dev @mrhenry/babel-plugin-core-web

yarn add --dev @mrhenry/babel-plugin-core-web

Example with script tags (`module` vs `nomodules`)

example migration

babel.config.js

module.exports = function(api) {
    api.cache(true);
    return {
        plugins: [
            ["@mrhenry/core-web", {
                browsers: {
                    chrome: "31",
                    firefox: "26",
                    edge: "12",
                    opera: "26",
                    safari: "8",
                    ie: "11",
                }
            }]
        ]
    };
};

webpack config

const babelPresetEnv = require( '@babel/preset-env' );

...

{
    loader: 'babel-loader',
    options: {
        comments: false,
        plugins: [
            [
                '@mrhenry/core-web',
                {
                    browsers: {
                        chrome: "63",
                        firefox: "57",
                        edge: "18",
                        opera: "57",
                        safari: "12",
                        ie: "11",
                    },
                },
            ],
        ],
        presets: [
            [
                babelPresetEnv,
                {
                    corejs: '^3.6.3',
                    targets: {
                        browsers: ...,
                    },
                    useBuiltIns: 'usage',
                },
            ],
        ],
    },
}

issues

If have any trouble using babel-plugin-core-web please open an issue here. We will try to get back to you as soon as possible.

missing polyfills

If a polyfill is missing from this plugin please open an issue here.

We do take the specification status into consideration before adding new polyfills.

@mrhenry/babel-plugin-core-web