Auto cache-buster

gistfile1.js

window.addEventListener('keydown', function(e) {
    if (e.keyCode === 116 || (e.ctrlKey && e.keyCode === 82)) { // f5 or ctrl + r
        // parse URL
        var split = window.location.href.split('#');
        var url = split[0];
        var hash = split[1];

        // set cache-busting query string param
        var pair = 'cachebuster=' + Date.now();
        if (url.indexOf('cachebuster=') > -1) {
            url = url.replace(/cachebuster=\d+/, pair);
        } else {
            url += (url.indexOf('?') > -1 ? '&' : '?') + pair;
        }

        // reassemble
        var final = url + (hash ? '#' + hash : '');
        window.location.href = final;

        e.preventDefault();
    }
});