chaining.js

/* core chaining and context builder */
(() => {
"use strict";

const plugins = {};
const ready = {
	callbacks: [],
	installed: false
};
let oref = null;

function noref() {
	const ref = window.$;

	window.$ = oref;
	return ref;
}

function onready(callback) {
	if(callback) {
		if(document.readyState != "loading")
			return callback instanceof Function ? callback() : null;
		if(!ready.installed) {
			document.addEventListener("DOMContentLoaded", () => onready(null));
			ready.installed = true;
		}
		return ready.callbacks.push(callback);
	}

	while(ready.callbacks.length)
		ready.callbacks.pop()();
}

function plug(obj, chained = true) {
	const target = chained ? plugins : this;

	Object.assign(target, obj);
}

function query(arg, ctx = document) {
	let nodes = [];

	if(arg instanceof Function)
		return onready(arg);
	if(Array.isArray(arg))
		nodes = arg;
	else if(!!arg) {
		if(typeof arg == "string" && ctx.querySelectorAll) {
			try {
			nodes = [...ctx.querySelectorAll(arg)];
			} catch(e) {
				console.log("query(): invalid selector", arg);
				nodes = [];
			}
		}
		else if(arg.nodeType || arg == window)
			nodes = [arg];
		else
			console.warn("query(): invalid argument");
	}
	return Object.assign(nodes, plugins);
}

function init() {
	const pub = Object.assign(query, {noref,plug});

	pub.fn = plugins;
	window.Pixlib = pub;
	oref = window.$;
	window.$ = pub;
}

init();
})();