when-dom-ready/dist/index.umd.js

$(document).ready() for the 21st century

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global.whenDomReady = factory());
}(this, (function () { 'use strict';

/* eslint no-void: "off" */

// Loaded ready states
var loadedStates = ['interactive', 'complete'];

// Return Promise
var whenDomReady = function whenDomReady(cb, doc) {
	return new Promise(function (resolve) {
		// Allow doc to be passed in as the lone first param
		if (cb && typeof cb !== 'function') {
			doc = cb;
			cb = null;
		}

		// Use global document if we don't have one
		doc = doc || window.document;

		// Handle DOM load
		var done = function done() {
			return resolve(void (cb && setTimeout(cb)));
		};

		// Resolve now if DOM has already loaded
		// Otherwise wait for DOMContentLoaded
		if (loadedStates.indexOf(doc.readyState) !== -1) {
			done();
		} else {
			doc.addEventListener('DOMContentLoaded', done);
		}
	});
};

// Promise chain helper
whenDomReady.resume = function (doc) {
	return function (val) {
		return whenDomReady(doc).then(function () {
			return val;
		});
	};
};

return whenDomReady;

})));
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