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function isOpera(userAgent) {
return userAgent.indexOf('Opera') >= 0 || userAgent.indexOf('OPR') >= 0;
}
function getOperaVersion(userAgent) {
const match = userAgent.match(/OPR[^0-9]*([0-9]+)[^0-9]+/);
return match ? parseInt(match[1], 10) : false;
}
function isChrome(userAgent) {
return userAgent.indexOf('Chrom') >= 0 && !isOpera(userAgent);
}
function getChromeVersion(userAgent) {
const match = userAgent.match(/Chrom(?:e|ium)\/([0-9]+)\./);
return match ? parseInt(match[1], 10) : false;
}
export function canInjectU2fApi(userAgent) {
const isSupportedChrome = isChrome(userAgent) && getChromeVersion(userAgent) >= 41;
const isSupportedOpera = isOpera(userAgent) && getOperaVersion(userAgent) >= 40;
const isMobile =
userAgent.indexOf('droid') >= 0 ||
userAgent.indexOf('CriOS') >= 0 ||
/\b(iPad|iPhone|iPod)(?=;)/.test(userAgent);
return (isSupportedChrome || isSupportedOpera) && !isMobile;
}
export default function importU2FLibrary() {
if (window.u2f) {
return Promise.resolve(window.u2f);
}
const userAgent = typeof navigator !== 'undefined' ? navigator.userAgent : '';
if (canInjectU2fApi(userAgent) || (gon && gon.test_env)) {
return import(/* webpackMode: "eager" */ 'vendor/u2f').then(() => window.u2f);
}
return Promise.reject();
}
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