@phaserjs/phaser/device/browser/IsTrident.js

Phaser 4

export function IsTrident() {
  const trident = /Trident\/(\d+\.\d+)(.*)rv:(\d+\.\d+)/.test(navigator.userAgent);
  const tridentVersion = trident ? parseInt(RegExp.$1, 10) : 0;
  const tridentIEVersion = trident ? parseInt(RegExp.$3, 10) : 0;
  return {
    trident,
    tridentVersion,
    tridentIEVersion
  };
}