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Squeeze support module. Close gh-1165.

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markelog authored and dmethvin committed Feb 10, 2013
1 parent eee2eaf commit 22a4e5bd0a7c0a92b54b9965984b582fd42099f2
Showing with 22 additions and 32 deletions.
  1. +22 −32 src/support.js
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@@ -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;
-})({});
+})( {} );

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