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ember-cli-polyfill-importer

v0.0.4

Published

The default blueprint for ember-cli addons.

Downloads

3,647

Readme

ember-cli-polyfill-importer

Build Status Ember Observer Score npm version

Ember-CLI addon to add a polyfills based on caniuse tests, specific browsers (browserlist) or custom logic.

caniuse and browserlist tests are made against app's targets.js. If those tests fail, the polyfill/script won't be imported.

It will also use the fastbootShim transformation while importing, if ember-cli-fastboot is installed in the host app.

Compatibility

  • Ember CLI v2.15 or above (2.16 is required for using app.import transformation options)

Installation

ember install ember-cli-polyfill-importer

Usage

Just install your polyfill npm package and add configuration as follows:

// ember-cli-build.js
// ..
let app = new EmberApp(defaults, {
  // Add options here
  polyfills: {
    // key is the package name
    'matchmedia-polyfill': {
      files: ['matchMedia.js'], // files array relative to package's root
      caniuse: 'matchmedia' // can i use test name
    },
    'raf-polyfill': {
      files: ['raf.js'],
      shouldImport(targets) {
        // targets is the host app browser targets
        return false; // or your custom test
      }
    },
    'element-closest': {
      files: ['browser.js'],
      browsers: ['ie 9', 'chrome 52'] // browserlist array of browsers query in which to include the polyfill
      // optionally, you can define the options to use when calling app.import
      importOptions: { }
    }
  }
});
// ..

You can also use this addon as another addon dependency. To do that, make sure that ember-cli-polyfill-importer and the polyfill npm package are in your dependencies and not devDependencies and provide configuration in your index.js file like:

// index.js
module.exports = {
  name: require('./package').name,
  options: {
    // key is the package name
    'matchmedia-polyfill': {
      files: ['matchMedia.js'], // files array relative to package's root
      caniuse: 'matchmedia' // can i use test name
    },
    'raf-polyfill': {
      files: ['raf.js'],
      shouldImport(targets) {
        // targets is the host app browser targets
        return false; // or your custom test
      }
    },
    'element-closest': {
      files: ['browser.js'],
      browsers: ['ie 9', 'chrome 52'] // browserlist array of browsers query in which to include the polyfill
      // optionally, you can define the options to use when calling app.import
      importOptions: { }
    }
  }
};

caniuse test is done using https://github.com/nyalab/caniuse-api project. browserlist test is done using https://github.com/browserslist/browserslist project.

License

This project is licensed under the MIT License.