Version 2.x brings a shared widget fully rewritten using TypeScript, targetting es5, transpiled and polyfilled using Babel, which works gracefully with IE11.
Version 2.x drops the untested gracefull downgrade feature, which makes it unusable with Internet Explorer <11 and with browsers which don't support the FileReader API.
If you use the gulpifier module,
you should add these 2 lignes into your themes
settings[gulpifier_whitelist][css] = filechunk:filechunk.css settings[gulpifier_whitelist][js] = filechunk:filechunk.js