xxxxxxxxxx
function getIdFromUrl(url) {
var regex = /[?&]id(=([^&#]*)|&|#|$)/,
results = regex.exec(url);
return results ? results[2] || '' : '';
}
var url = 'https://example.com/?id=12345&page=about';
var id = getIdFromUrl(url);
console.log(id); // Output: 12345