export function isFirefox() {

return navigator.userAgent.includes('Firefox');

}

export function isVivaldi() {

return navigator.userAgent.toLowerCase().includes('vivaldi');

}

export function isYaBrowser() {

return navigator.userAgent.toLowerCase().includes('yabrowser');

}

export function isOpera() {

const agent = navigator.userAgent.toLowerCase();

return agent.includes('opr') || agent.includes('opera');

}

export function isEdge() {

return navigator.userAgent.includes('Edg');

}

export function isWindows() {

return navigator.platform.toLowerCase().startsWith('win');

}

export function isMacOS() {

return navigator.platform.toLowerCase().startsWith('mac');

}

export function isMobile() {

const agent = navigator.userAgent.toLowerCase();

return agent.includes('mobile');

}

export function getChromeVersion() {

const agent = navigator.userAgent.toLowerCase();

const m = agent.match(/chrom[e|ium]\/([^ ]+)/);

if (m && m[1]) {

return m[1];

}

return null;

}

export function compareChromeVersions($a: string, $b: string) {

const a = $a.split('.').map((x) => parseInt(x));

const b = $b.split('.').map((x) => parseInt(x));

for (let i = 0; i < a.length; i++) {

if (a[i] !== b[i]) {

return a[i] < b[i] ? -1 : 1;

}

}

return 0;

}

export function isDeepSelectorSupported() {

try {

document.querySelector('x /deep/ x');

return true;

} catch (err) {

return false;

}

}