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author | Richard Gibson <richard.gibson@gmail.com> | 2012-06-11 13:24:26 -0400 |
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committer | Dave Methvin <dave.methvin@gmail.com> | 2012-06-11 13:24:26 -0400 |
commit | 1ac15582f2a9d45af5a28a9de88d579c8d97bc23 (patch) | |
tree | 1870a09a052d6a7354212367b9db1d03ebe2fead /src/support.js | |
parent | eb7a7af46ae38723f02b394ede4f0d74ad615262 (diff) | |
download | jquery-1ac15582f2a9d45af5a28a9de88d579c8d97bc23.tar.gz jquery-1ac15582f2a9d45af5a28a9de88d579c8d97bc23.zip |
Shrink support.js, closes gh-818
Diffstat (limited to 'src/support.js')
-rw-r--r-- | src/support.js | 89 |
1 files changed, 40 insertions, 49 deletions
diff --git a/src/support.js b/src/support.js index 16ce528f2..65081e40c 100644 --- 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; })(); |