src/manipulation/support.js

define( [
	"../var/document",
	"../var/support"
], function( document, support ) {

"use strict";

( function() {
	var fragment = document.createDocumentFragment(),
		div = fragment.appendChild( document.createElement( "div" ) ),
		input = document.createElement( "input" );

	// Support: Android 4.0 - 4.3 only
	// Check state lost if the name is set (trac-11217)
	// Support: Windows Web Apps (WWA)
	// `name` and `type` must use .setAttribute for WWA (trac-14901)
	input.setAttribute( "type", "radio" );
	input.setAttribute( "checked", "checked" );
	input.setAttribute( "name", "t" );

	div.appendChild( input );

	// Support: Android <=4.1 only
	// Older WebKit doesn't clone checked state correctly in fragments
	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;

	if ( window.trustedTypes && window.trustedTypes.createPolicy ) {
		support.noCloneChecked = true;
		support.option = true;
	} else {

		// Support: IE <=11 only
		// Make sure textarea (and checkbox) defaultValue is properly cloned
		div.innerHTML = "<textarea>x</textarea>";
		support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;

		// Support: IE <=9 only
		// IE <=9 replaces <option> tags with their contents when inserted outside of
		// the select element.
		div.innerHTML = "<option></option>";
		support.option = !!div.lastChild;
	}
} )();

return support;

} );