This script will load multiple JS files dynamically without jQuery

js-autoloader.js

ExecuteOrDelayUntilScriptLoaded(loadJS, 'sp.js');

function loadJS() {
    var index = 0;
    var site = document.location.href;
    var resources = [];

    function createResource(type, location, url, code) {
        var obj = document.createElement(type);

        if (type === 'script') {
            if (url) obj.src = url;
            if (code) obj.text = code;
        } else {
            obj.href = url;
            obj.rel = 'stylesheet';
        }
        obj.location = location;
        obj.onload = indexCount;
        return obj;
    }

    function sendScript(index) {
        return resources[index].location.appendChild(resources[index]);
    }

    function indexCount() {
        if (index < resources.length) {
            sendScript(index);
            index++;
        }
    }

    // deps
    resources.push(createResource('link', document.head, '/assets/code/css/dataTables-1.10.18.min.css', null));
    resources.push(createResource('script', document.body, '/assets/code/js/libs/jquery.dataTables-1.10.19.min.js', null));
    resources.push(createResource('script', document.body, '/assets/code/js/libs/spcalendarpro.js', null));

    if (/Pages\/Intro.html/i.test(site)) {
        resources.push(createResource('script', document.body, '/assets/intro-dep.js', null));
        resources.push(createResource('script', document.body, '/assets/intro.js', null));
    } 
    
    else if (/Pages\/Home.html/i.test(site)) {
        resources.push(createResource('script', document.body, '/assets/home-dep.js', null));
        resources.push(createResource('script', document.body, '/assets/home.js', null));
    } 

    else if (/Pages\/Welcome.html/i.test(site)) {
        resources.push(createResource('script', document.body, '/assets/js/encounters.js', null));
        resources.push(createResource('script', document.body, '/assets/js/search.js', null));
    }     
    
    indexCount();
}