Browser Support

Box UI elements are supported in the following browsers.

• Chrome, Firefox, Safari, and Edge (latest 2 versions)
• Limited support for Internet Explorer 11 (requires a ES2015/Intl polyfill)
• Mobile Chrome and Safari

ES2015 Intl Polyfill

Most Box UI Elements require an ES2015-capable browser supporting Intl (ECMAScript Internationalization API). If your application needs to support Internet Explorer 11 or Safari 9, please include a polyfill library or a service like polyfill.io to smartly load only the polyfills your users need. Box also provides the core-js standard library at:

https://cdn01.boxcdn.net/polyfills/core-js/2.5.3/core.min.js

Promises Polyfill

The Preview UI Element uses Promises. If your application needs to supports Internet Explorer 11, please include your favorite polyfill library or a service like polyfill.io to smartly load only the polyfills your users need. Box also provides a copy of the Bluebird promise library at:

https://cdn01.boxcdn.net/polyfills/bluebird/3.5.1/bluebird.min.js