Contains all polyfills needed to work on the largest range of devices. This is the default polyfill.

• Android 4.4.2 and above
• iOS back to iOS 8

• All ES6 features
• zone.js
• ES7 reflection

A limited of set of polyfills to work on more modern browsers. This file limits the number of ES6 polyfills which are already natively included in modern browsers.

• Android 5.0 and above
• iOS 9 and above

• zone.js
• ES7 reflection,
• ES6 polyfills, except for:

new regexp features, math features, symbols, typed arrays, weak maps / weak sets

Only the required polyfill for Angular 2. This does not come with any ES6 polyfills. Note that all polyfill files listed here included the required polyfills for Angular 2 to work correctly.

• Android 5.0 and above
• iOS 10 and above

• zone.js
• ES7 reflection

To easily judge which polyfill you may need you can check this ES6 support table.