Squeeze support module. Close gh-1165.

src/support.js

@@ -1,24 +1,19 @@
jQuery.support = (function( support ) {

	var a, select, opt, input, fragment,
		div = document.createElement("div");

	// Finish early in limited (non-browser) environments
	div.innerHTML = "<a>a</a><input type='checkbox'/>";
	a = div.getElementsByTagName("a")[ 0 ];
	if ( !a ) {
	var input = document.createElement("input"),
		fragment = document.createDocumentFragment(),
		div = document.createElement("div"),
		select = document.createElement("select"),
		opt = select.appendChild( document.createElement("option") );

	// Finish early in limited environments
	if ( !input.type ) {
		return support;
	}

	// First batch of tests
	select = document.createElement("select");
	opt = select.appendChild( document.createElement("option") );
	input = div.getElementsByTagName("input")[ 0 ];
	input.type = "checkbox";

	a.style.cssText = "float:left;opacity:.5";

	// Check the default checkbox/radio value ("" on WebKit; "on" elsewhere)
	support.checkOn = !!input.value;
	// Check the default checkbox/radio value ("" on old WebKit; "on" elsewhere)
	support.checkOn = input.value === "";

	// Must access the parent to make an option select properly
	// Support: IE9, IE10
@@ -33,6 +28,7 @@ jQuery.support = (function( support ) {
	support.pixelPosition = false;

	// Make sure checked status is properly cloned
	// Support: IE9, IE10
	input.checked = true;
	support.noCloneChecked = input.cloneNode( true ).checked;

@@ -42,35 +38,34 @@ jQuery.support = (function( support ) {
	support.optDisabled = !opt.disabled;

	// Check if an input maintains its value after becoming a radio
	// Support: IE9, IE10, Opera
	input = document.createElement("input");
	input.value = "t";
	input.setAttribute( "type", "radio" );
	input.type = "radio";
	support.radioValue = input.value === "t";

	// #11217 - WebKit loses check when the name is after the checked attribute
	input.setAttribute( "checked", "t" );
	input.setAttribute( "name", "t" );

	fragment = document.createDocumentFragment();
	fragment.appendChild( input );

	// WebKit doesn't clone checked state correctly in fragments
	// old WebKit doesn't clone checked state correctly in fragments
	support.checkClone = fragment.cloneNode( true ).cloneNode( true ).lastChild.checked;

	// Support: Firefox 17+
	// Beware of CSP restrictions (https://developer.mozilla.org/en/Security/CSP)
	div.setAttribute( "onfocusin", "t" );
	support.focusinBubbles = "onfocusin" in window || div.attributes.onfocusin.expando === false;
	support.focusinBubbles = "onfocusin" in window;

	div.style.backgroundClip = "content-box";
	div.cloneNode( true ).style.backgroundClip = "";
	support.clearCloneStyle = div.style.backgroundClip === "content-box";

	// Run tests that need a body at doc ready
	jQuery(function() {
		var container, marginDiv, tds,
		var container, marginDiv,
			divReset = "padding:0;margin:0;border:0;display:block;box-sizing:content-box;-moz-box-sizing:content-box;-webkit-box-sizing:content-box;",
			body = document.getElementsByTagName("body")[0];
			body = document.getElementsByTagName("body")[ 0 ];

		if ( !body ) {
			// Return for frameset docs that don't have a body
@@ -84,8 +79,9 @@ jQuery.support = (function( support ) {
		body.appendChild( container ).appendChild( div );
		div.innerHTML = "";
		div.style.cssText = "box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;padding:1px;border:1px;display:block;width:4px;margin-top:1%;position:absolute;top:1%;";
		support.boxSizing = ( div.offsetWidth === 4 );
		support.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== 1 );

		support.boxSizing = div.offsetWidth === 4;
		support.doesNotIncludeMarginInBodyOffset = body.offsetTop !== 1;

		// Use window.getComputedStyle because jsdom on node.js will break without it.
		if ( window.getComputedStyle ) {
@@ -106,14 +102,8 @@ jQuery.support = (function( support ) {
		}

		body.removeChild( container );

		// Null elements to avoid leaks in IE
		container = div = tds = marginDiv = null;
	});

	// Null elements to avoid leaks in IE
	select = fragment = opt = a = input = null;

	return support;
})({});
})( {} );