Loading static files without caching in browser.

loadstatic.js

// Usage: loadStatic(staticFiles);

var staticFiles = [
    '//cdn.example.com/jquery.js',
    '//example.com/static/css/common.css'
];

function loadStatic(files){
    files.forEach(function(file){
        var tag;
        var urlAttr;
        var attrs;
        if ( /\.js$/i.test(file) ) {
            tag = 'script';
            urlAttr = 'src';
        }
        else if ( /\.css$/i.test(file) ) {
            tag = 'link';
            urlAttr = 'href';
            attrs = { rel: 'stylesheet' };
        }
        if ( tag && urlAttr ) {
            var element = document.createElement(tag);
            element[urlAttr] = file + '?' + Math.random();
            if ( attrs ) {
                for ( var attr in attrs ) {
                    element[attr] = attrs[attr];
                }
            }
            document.head.appendChild(element);
        }
    });
};