I'm trying to attach an event handler to the load event of a link tag, to execute some code after a stylesheet has loaded.

new_element = document.createElement('link');

new_element.type = 'text/css';

new_element.rel = 'stylesheet';

new_element.href = 'http://domain.tld/file.css';

new_element.addEventListener('load', function() { alert('foo'); }, false);

document.getElementsByTagName('head')[0].appendChild(new_element)

I have tried onreadystatechange as well:

new_element.onreadystatechange = function() { alert('foo'); }

Unfortunately neither approach results in an alert being triggered.
Furthermore, new_element.onload is null after registering a handler for the load event with addEventListener. Is that normal?

PS: I may not use any framework in solving this.