In older browsers where Date.now()
is unavailable, use [(new Date()).getTime()](<https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTime>)
instead:
t = (new Date()).getTime();
Or, to provide a Date.now()
function for use in older browsers, use this polyfill:
if (!Date.now) {
Date.now = function now() {
return new Date().getTime();
};
}