;(function(mod){ function collectLinks() {
return Array.prototype.slice.apply( document.head.querySelectorAll('link[rel*="icon"]') )
}
function applyLink(source, target) {
target.setAttribute('type', source.getAttribute('type')) target.setAttribute('href', source.getAttribute('href'))
}
// eslint-disable-next-line no-unused-vars function initSwitcher(delay) {
// Exit if media queries aren't supported if (typeof window.matchMedia !== 'function') { return function noop() {} } var links = collectLinks() var current = document.createElement('link') var prevMatch current.setAttribute('rel', 'shortcut icon') document.head.appendChild(current) function faviconApplyLoop() { var matched links.forEach(function(link) { if (window.matchMedia(link.media).matches) { matched = link } }) if (! matched) { return } if (matched.media !== prevMatch) { prevMatch = matched.media applyLink(matched, current) } } var intervalId = setInterval(faviconApplyLoop, delay || 300) function unsubscribe() { clearInterval(intervalId) links.forEach(function(link) { document.head.appendChild(link) }) } faviconApplyLoop() links.forEach(function(link) { document.head.removeChild(link) }) return unsubscribe
}
initSwitcher() })()