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@RichardTMiles
Last active January 18, 2018 08:50
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Dynamic Javascript Inclusion using LoadJS and PJAX. Loading javascript files on call time when refreshing with Ajax.
<html> // This was chopped from https://carbonphp.com , a php framework which incorporates PJAX and and HTML5 Sockets
<head>
<script>
/*! loadJS: load a JS file asynchronously. [c]2014 @scottjehl, Filament Group, Inc. (Based on http://goo.gl/REQGQ by Paul Irish). Licensed MIT */
(function (w) {
let loadJS;
loadJS = function (src, cb) {
"use strict";
let ref = w.document.getElementsByTagName("script")[0];
let script = w.document.createElement("script");
script.src = src;
script.async = true;
ref.parentNode.insertBefore(script, ref);
if (cb && typeof(cb) === "function")
script.onload = cb;
return script;
}; // commonjs
if (typeof module !== "undefined") module.exports = loadJS;
else w.loadJS = loadJS;
}(typeof global !== "undefined" ? global : this));// Hierarchical PJAX Request
// Your new document ready function
function Carbon(cb) {
document.addEventListener("Carbon", function fn(event) {
document.removeEventListener("Carbon", fn);
cb(event);
});
}
</script>
</head>
<body>
<!-- Pjax content-->
<article>
<!-- Example Page -->
Carbon(()=> { <!-- Your Code Here -->
$.fn.load_datatables(.mytable);
});
<!--./Example Page -->
</article>
<!-- ./Pjax content -->
<script>
loadJS('Jquery.js', () => { // include jQuery
loadJS('PJAX.js', () => { // include PJAX
$(document).pjax('a', 'article'); // All links will be sent with ajax
let JSLoaded = new Set();
$.fn.CarbonJS = (sc, cb) => (!JSLoaded.has(sc) ? loadJS(sc, cb) : cb());
//-- Data tables -->
$.fn.load_datatables = (table) =>
$.fn.CarbonJS("dataTables.bootstrap.js", () => {
try { return $(table).DataTable() } catch (err) { return false }});
//-- iCheak -->
$.fn.load_iCheck = (input) => {
$.fn.CarbonJS("icheck.min.js", () => {
$(input).iCheck({
checkboxClass: 'icheckbox_square-blue', radioClass: 'iradio_square-blue', increaseArea: '20%' // optional
});
});
};
// Create Events
$.fn.runEvent = (ev) => {
let event;
if (document.createEvent) {
event = document.createEvent("HTMLEvents");
event.initEvent(ev, true, true)
} else {
event = document.createEventObject();
event.eventType = ev
}
event.eventName = ev;
document.createEvent ? document.dispatchEvent(event) :
document.fireEvent("on" + event.eventType, event);
};
// run scripts wrapped in our Carbon function
$(document).on('pjax:complete', () => $.fn.runEvent("Carbon"));
})
});
</script>
</body>
</html> // Your welcome ;)
@RichardTMiles
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RichardTMiles commented Jan 18, 2018

The key here is that you need to make sure no race conditions are present and that files are loaded when needed.
I personally dont use the caching feature built into PJAX, as my website is fully dynamic. You can achive this too by adding

$(document).on('pjax:popstate', () => $.pjax.reload(selector));    // refresh our state always!!

Just remember to change the selector.

The Filament Group killed the loadJS() function, but for css use google #cuz_google
https://developers.google.com/speed/docs/insights/OptimizeCSSDelivery

I use load js because I desired a fully async load that fully controlled in order. Simply put, I need the jQuery file to load before PJAX. My personal script tag is at the bottom of the page like the example above; however it contains many more cascading js includes.

The Script in the head "Carbon()" accepts a function argument and attaches a one time eventlistener to it. This became essential when changing pages with a popstate. No since in running the Datatables script after we've moved pages.

Developing in PHP... Skip the setup by using Carbonphp.com

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