Shrink support.js, closes gh-818

diff --git a/src/support.js b/src/support.js
index 16ce528f23073ad1a2474ca4d0405bee3f54996d..65081e40cb5329b13e04f5c70e4a8d5bc6f06523 100644 (file)
--- a/src/support.js
+++ b/src/support.js
@@ -7,20 +7,17 @@ jQuery.support = (function() {
                opt,
                input,
                fragment,
-               tds,
-               events,
                eventName,
                i,
                isSupported,
-               div = document.createElement( "div" ),
-               documentElement = document.documentElement;
+               div = document.createElement("div");
 
        // Preliminary tests
-       div.setAttribute("className", "t");
-       div.innerHTML = "   <link/><table></table><a href='/a' style='top:1px;float:left;opacity:.55;'>a</a><input type='checkbox'/>";
+       div.setAttribute( "className", "t" );
+       div.innerHTML = "  <link/><table></table><a href='/a' style='top:1px;float:left;opacity:.5;'>a</a><input type='checkbox'/>";
 
-       all = div.getElementsByTagName( "*" );
-       a = div.getElementsByTagName( "a" )[ 0 ];
+       all = div.getElementsByTagName("*");
+       a = div.getElementsByTagName("a")[ 0 ];
 
        // Can't get basic test support
        if ( !all || !all.length || !a ) {
@@ -28,9 +25,9 @@ jQuery.support = (function() {
        }
 
        // First batch of supports tests
-       select = document.createElement( "select" );
+       select = document.createElement("select");
        opt = select.appendChild( document.createElement("option") );
-       input = div.getElementsByTagName( "input" )[ 0 ];
+       input = div.getElementsByTagName("input")[ 0 ];
 
        support = {
                // IE strips leading whitespace when .innerHTML is used
@@ -55,7 +52,7 @@ jQuery.support = (function() {
                // Make sure that element opacity exists
                // (IE uses filter instead)
                // Use a regex to work around a WebKit issue. See #5145
-               opacity: /^0.55/.test( a.style.opacity ),
+               opacity: /^0.5/.test( a.style.opacity ),
 
                // Verify style float existence
                // (IE uses styleFloat instead of cssFloat)
@@ -81,7 +78,7 @@ jQuery.support = (function() {
                html5Clone: document.createElement("nav").cloneNode( true ).outerHTML !== "<:nav></:nav>",
 
                // jQuery.support.boxModel DEPRECATED in 1.8 since we don't support Quirks Mode
-               boxModel: (document.compatMode === "CSS1Compat"),
+               boxModel: ( document.compatMode === "CSS1Compat" ),
 
                // Will be defined later
                submitBubbles: true,
@@ -119,17 +116,17 @@ jQuery.support = (function() {
                        // bound event handlers (IE does this)
                        support.noCloneEvent = false;
                });
-               div.cloneNode( true ).fireEvent( "onclick" );
+               div.cloneNode( true ).fireEvent("onclick");
        }
 
        // Check if a radio maintains its value
        // after being appended to the DOM
        input = document.createElement("input");
        input.value = "t";
-       input.setAttribute("type", "radio");
+       input.setAttribute( "type", "radio" );
        support.radioValue = input.value === "t";
 
-       input.setAttribute("checked", "checked");
+       input.setAttribute( "checked", "checked" );
 
        // #11217 - WebKit loses check when the name is after the checked attribute
        input.setAttribute( "name", "t" );
@@ -156,9 +153,9 @@ jQuery.support = (function() {
        // to go haywire. See: https://developer.mozilla.org/en/Security/CSP
        if ( div.attachEvent ) {
                for ( i in {
-                       submit: 1,
-                       change: 1,
-                       focusin: 1
+                       submit: true,
+                       change: true,
+                       focusin: true
                }) {
                        eventName = "on" + i;
                        isSupported = ( eventName in div );
@@ -170,17 +167,10 @@ jQuery.support = (function() {
                }
        }
 
-       fragment.removeChild( div );
-
-       // Null elements to avoid leaks in IE
-       fragment = select = opt = div = input = null;
-
        // Run tests that need a body at doc ready
        jQuery(function() {
-               var container, marginDiv,
+               var container, div, tds, marginDiv,
                        divReset = "padding:0;margin:0;border:0;display:block;overflow:hidden;",
-                       conMarginTop = 1,
-                       boxSizingPrefixes = [ "", "-moz-", "-webkit-", "" ],
                        body = document.getElementsByTagName("body")[0];
 
                if ( !body ) {
@@ -189,7 +179,7 @@ jQuery.support = (function() {
                }
 
                container = document.createElement("div");
-               container.style.cssText = "visibility:hidden;border:0;width:0;height:0;position:static;top:0;margin-top:" + conMarginTop + "px";
+               container.style.cssText = "visibility:hidden;border:0;width:0;height:0;position:static;top:0;margin-top:1px";
                body.insertBefore( container, body.firstChild );
 
                // Construct the test element
@@ -204,7 +194,7 @@ jQuery.support = (function() {
                // hidden; don safety goggles and see bug #4512 for more information).
                // (only IE 8 fails this test)
                div.innerHTML = "<table><tr><td style='padding:0;margin:0;border:0;display:none'></td><td>t</td></tr></table>";
-               tds = div.getElementsByTagName( "td" );
+               tds = div.getElementsByTagName("td");
                isSupported = ( tds[ 0 ].offsetHeight === 0 );
 
                tds[ 0 ].style.display = "";
@@ -214,20 +204,27 @@ jQuery.support = (function() {
                // (IE <= 8 fail this test)
                support.reliableHiddenOffsets = isSupported && ( tds[ 0 ].offsetHeight === 0 );
 
-               // Check if div with explicit width and no margin-right incorrectly
-               // gets computed margin-right based on width of container. For more
-               // info see bug #3333
-               // Fails in WebKit before Feb 2011 nightlies
-               // WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
+               // Check box-sizing and margin behavior
+               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%;";
+               support.boxSizing = ( div.offsetWidth === 4 );
+               support.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== 1 );
                if ( window.getComputedStyle ) {
-                       div.innerHTML = "";
-                       marginDiv = document.createElement( "div" );
+                       support.pixelMargin = ( window.getComputedStyle( div, null ) || {} ).marginTop !== "1%";
+                       support.boxSizingReliable = ( window.getComputedStyle( div, null ) || { width: "4px" } ).width === "4px";
+
+                       // Check if div with explicit width and no margin-right incorrectly
+                       // gets computed margin-right based on width of container. For more
+                       // info see bug #3333
+                       // Fails in WebKit before Feb 2011 nightlies
+                       // WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
+                       marginDiv = document.createElement("div");
                        marginDiv.style.cssText = div.style.cssText = divReset;
                        marginDiv.style.marginRight = marginDiv.style.width = "0";
-                       div.style.width = "2px";
+                       div.style.width = "1px";
                        div.appendChild( marginDiv );
                        support.reliableMarginRight =
-                               ( parseInt( ( window.getComputedStyle( marginDiv, null ) || { marginRight: 0 } ).marginRight, 10 ) || 0 ) === 0;
+                               !parseFloat( ( window.getComputedStyle( marginDiv, null ) || {} ).marginRight );
                }
 
                if ( typeof div.style.zoom !== "undefined" ) {
@@ -245,24 +242,18 @@ jQuery.support = (function() {
                        div.style.overflow = "visible";
                        div.innerHTML = "<div style='width:5px;'></div>";
                        support.shrinkWrapBlocks = ( div.offsetWidth !== 3 );
-               }
 
-               div.style.cssText = boxSizingPrefixes.join("box-sizing:border-box;") + "border:1px;width:4px;padding:1px;display:block;margin-top:1%;";
-               support.boxSizing = ( div.offsetWidth === 4 );
-               if ( window.getComputedStyle ) {
-                       support.boxSizingReliable = ( window.getComputedStyle( div, null ) || { width: "4px" } ).width === "4px";
-                       support.pixelMargin = ( window.getComputedStyle( div, null ) || { marginTop: 0 } ).marginTop !== "1%";
-               }
-
-               support.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== conMarginTop );
-
-               if ( typeof container.style.zoom !== "undefined" ) {
                        container.style.zoom = 1;
                }
 
+               // Null elements to avoid leaks in IE
                body.removeChild( container );
-               marginDiv = div = container = null;
+               container = div = tds = marginDiv = null;
        });
 
+       // Null elements to avoid leaks in IE
+       fragment.removeChild( div );
+       all = a = select = opt = input = fragment = div = null;
+
        return support;
 })();