Returns whether Unpoly can boot in the current browser.
If this returns false Unpoly will prevent itself from booting
and will not compile the initial page.
This leaves you with a classic server-side application.
Browser support
Unpoly aims to supports all modern browsers.
Chrome, Firefox, Edge, Safari
Full support.
Internet Explorer 11
Full support with a Promise polyfill like es6-promise (2.4 KB).
Support may be removed when Microsoft retires IE11 in June 2022.
Internet Explorer 10 or lower
Unpoly will not boot or run compilers,
leaving you with a classic server-side application.
