app/javascript/mastodon/load_keyboard_extensions.js

   1 // On KaiOS, we may not be able to use a mouse cursor or navigate using Tab-based focus, so we install
   2 // special left/right focus navigation keyboard listeners, at least on public pages (i.e. so folks
   3 // can at least log in using KaiOS devices).
   4
   5 function importArrowKeyNavigation() {
   6   return import(/* webpackChunkName: "arrow-key-navigation" */ 'arrow-key-navigation');
   7 }
   8
   9 export default function loadKeyboardExtensions() {
  10   if (/KAIOS/.test(navigator.userAgent)) {
  11     return importArrowKeyNavigation().then(arrowKeyNav => {
  12       arrowKeyNav.register();
  13     });
  14   }
  15   return Promise.resolve();
  16 }