features.js

define(["requirejs-dplugins/has"], function (has) {
	// Flag for whether to create background iframe behind popups like Menus and Dialog.
	// A background iframe is useful to prevent problems with popups appearing behind applets/pdf files.
	has.add("config-bgIframe", false);

	// Returns the name of the method to test if an element matches a CSS selector.
	has.add("dom-matches", function () {
		var node = document.body;
		if (node.matches) { return "matches"; }
		if (node.webkitMatchesSelector) { return "webkitMatchesSelector"; }
		if (node.mozMatchesSelector) { return "mozMatchesSelector"; }
		if (node.msMatchesSelector) { return "msMatchesSelector"; }
	});

	// Does platform have native support for document.registerElement() or a polyfill to simulate it?
	has.add("document-register-element", typeof document !== "undefined" && !!document.registerElement);

	// Can we use __proto__ to reset the prototype of DOMNodes?
	// It's not available on IE<11, and even on IE11 it makes the node's attributes
	// (ex: node.attributes, node.textContent) disappear, so disabling it on IE11 too.
	has.add("dom-proto-set", function () {
		var node = document.createElement("div");
		/* jshint camelcase: false */
		/* jshint proto: true */
		if (!node.__proto__) {
			return false;
		}
		node.__proto__ = {};
		/* jshint camelcase: true */
		/* jshint proto: false */
		return !!node.attributes;
	});

	// Flag to enable support for textdir attribute
	has.add("bidi", false);

	return has;
});