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-rw-r--r--src/support.js112
1 files changed, 38 insertions, 74 deletions
diff --git a/src/support.js b/src/support.js
index 70f5f114d..c99bb3922 100644
--- a/src/support.js
+++ b/src/support.js
@@ -1,16 +1,6 @@
jQuery.support = (function() {
- var support,
- all,
- a,
- select,
- opt,
- input,
- fragment,
- eventName,
- i,
- isSupported,
- clickFn,
+ var support, all, a, select, opt, input, fragment, eventName, isSupported, i,
div = document.createElement("div");
// Setup
@@ -80,9 +70,6 @@ jQuery.support = (function() {
boxModel: document.compatMode === "CSS1Compat",
// Will be defined later
- submitBubbles: true,
- changeBubbles: true,
- focusinBubbles: false,
deleteExpando: true,
noCloneEvent: true,
inlineBlockNeedsLayout: false,
@@ -101,24 +88,13 @@ jQuery.support = (function() {
select.disabled = true;
support.optDisabled = !opt.disabled;
- // Test to see if it's possible to delete an expando from an element
- // Fails in Internet Explorer
+ // Support: IE<9
try {
delete div.test;
} catch( e ) {
support.deleteExpando = false;
}
- if ( !div.addEventListener && div.attachEvent && div.fireEvent ) {
- div.attachEvent( "onclick", clickFn = function() {
- // Cloning a node shouldn't copy over any
- // bound event handlers (IE does this)
- support.noCloneEvent = false;
- });
- div.cloneNode( true ).fireEvent("onclick");
- div.detachEvent( "onclick", clickFn );
- }
-
// Check if we can trust getAttribute("value")
input = document.createElement("input");
input.setAttribute( "value", "" );
@@ -130,49 +106,42 @@ jQuery.support = (function() {
support.radioValue = input.value === "t";
// #11217 - WebKit loses check when the name is after the checked attribute
- input.setAttribute( "checked", "checked" );
+ input.setAttribute( "checked", "t" );
input.setAttribute( "name", "t" );
- div.appendChild( input );
fragment = document.createDocumentFragment();
- fragment.appendChild( div.lastChild );
-
- // WebKit doesn't clone checked state correctly in fragments
- support.checkClone = fragment.cloneNode( true ).cloneNode( true ).lastChild.checked;
+ fragment.appendChild( input );
// Check if a disconnected checkbox will retain its checked
// value of true after appended to the DOM (IE6/7)
support.appendChecked = input.checked;
- fragment.removeChild( input );
- fragment.appendChild( div );
+ // WebKit doesn't clone checked state correctly in fragments
+ support.checkClone = fragment.cloneNode( true ).cloneNode( true ).lastChild.checked;
- // Technique from Juriy Zaytsev
- // http://perfectionkills.com/detecting-event-support-without-browser-sniffing/
- // We only care about the case where non-standard event systems
- // are used, namely in IE. Short-circuiting here helps us to
- // avoid an eval call (in setAttribute) which can cause CSP
- // to go haywire. See: https://developer.mozilla.org/en/Security/CSP
+ // Support: IE<9
+ // Opera does not clone events (and typeof div.attachEvent === undefined).
+ // IE9-10 clones events bound via attachEvent, but they don't trigger with .click()
if ( div.attachEvent ) {
- for ( i in {
- submit: true,
- change: true,
- focusin: true
- }) {
- eventName = "on" + i;
- isSupported = ( eventName in div );
- if ( !isSupported ) {
- div.setAttribute( eventName, "return;" );
- isSupported = ( typeof div[ eventName ] === "function" );
- }
- support[ i + "Bubbles" ] = isSupported;
- }
+ div.attachEvent( "onclick", function() {
+ support.noCloneEvent = false;
+ });
+
+ div.cloneNode( true ).click();
+ }
+
+ // Support: IE<9 (lack submit/change bubble), Firefox 17+ (lack focusin event)
+ // Beware of CSP restrictions (https://developer.mozilla.org/en/Security/CSP), test/csp.php
+ for ( i in { submit: true, change: true, focusin: true }) {
+ div.setAttribute( eventName = "on" + i, "t" );
+
+ support[ i + "Bubbles" ] = eventName in window || div.attributes[ eventName ].expando === false;
}
// Run tests that need a body at doc ready
jQuery(function() {
- var container, div, tds, marginDiv,
- divReset = "padding:0;margin:0;border:0;display:block;overflow:hidden;box-sizing:content-box;-moz-box-sizing:content-box;-webkit-box-sizing:content-box;",
+ var container, marginDiv, tds,
+ 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];
if ( !body ) {
@@ -181,20 +150,17 @@ jQuery.support = (function() {
}
container = document.createElement("div");
- container.style.cssText = "visibility:hidden;border:0;width:0;height:0;position:static;top:0;margin-top:1px";
- body.insertBefore( container, body.firstChild );
+ container.style.cssText = "border:0;width:0;height:0;position:absolute;top:0;left:-9999px;margin-top:1px";
- // Construct the test element
- div = document.createElement("div");
- container.appendChild( div );
+ body.appendChild( container ).appendChild( div );
+ // Support: IE8
// Check if table cells still have offsetWidth/Height when they are set
// to display:none and there are still other visible table cells in a
// table row; if so, offsetWidth/Height are not reliable for use when
// determining if an element has been hidden directly using
// display:none (it is still safe to use offsets if a parent element is
// hidden; don safety goggles and see bug #4512 for more information).
- // (only IE 8 fails this test)
div.innerHTML = "<table><tr><td></td><td>t</td></tr></table>";
tds = div.getElementsByTagName("td");
tds[ 0 ].style.cssText = "padding:0;margin:0;border:0;display:none";
@@ -203,8 +169,8 @@ jQuery.support = (function() {
tds[ 0 ].style.display = "";
tds[ 1 ].style.display = "none";
+ // Support: IE8
// Check if empty table cells still have offsetWidth/Height
- // (IE <= 8 fail this test)
support.reliableHiddenOffsets = isSupported && ( tds[ 0 ].offsetHeight === 0 );
// Check box-sizing and margin behavior
@@ -213,39 +179,36 @@ jQuery.support = (function() {
support.boxSizing = ( div.offsetWidth === 4 );
support.doesNotIncludeMarginInBodyOffset = ( body.offsetTop !== 1 );
- // NOTE: To any future maintainer, we've window.getComputedStyle
- // because jsdom on node.js will break without it.
+ // Use window.getComputedStyle because jsdom on node.js will break without it.
if ( window.getComputedStyle ) {
support.pixelPosition = ( window.getComputedStyle( div, null ) || {} ).top !== "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
+ // gets computed margin-right based on width of container. (#3333)
// Fails in WebKit before Feb 2011 nightlies
// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
- marginDiv = document.createElement("div");
+ marginDiv = div.appendChild( document.createElement("div") );
marginDiv.style.cssText = div.style.cssText = divReset;
marginDiv.style.marginRight = marginDiv.style.width = "0";
div.style.width = "1px";
- div.appendChild( marginDiv );
+
support.reliableMarginRight =
!parseFloat( ( window.getComputedStyle( marginDiv, null ) || {} ).marginRight );
}
if ( typeof div.style.zoom !== "undefined" ) {
+ // Support: IE<8
// Check if natively block-level elements act like inline-block
// elements when setting their display to 'inline' and giving
// them layout
- // (IE < 8 does this)
div.innerHTML = "";
div.style.cssText = divReset + "width:1px;padding:1px;display:inline;zoom:1";
support.inlineBlockNeedsLayout = ( div.offsetWidth === 3 );
+ // Support: IE6
// Check if elements with layout shrink-wrap their children
- // (IE 6 does this)
div.style.display = "block";
- div.style.overflow = "visible";
div.innerHTML = "<div></div>";
div.firstChild.style.width = "5px";
support.shrinkWrapBlocks = ( div.offsetWidth !== 3 );
@@ -255,14 +218,15 @@ jQuery.support = (function() {
body.style.zoom = 1;
}
- // Null elements to avoid leaks in IE
body.removeChild( container );
+
+ // Null elements to avoid leaks in IE
container = div = tds = marginDiv = null;
});
// Null elements to avoid leaks in IE
- fragment.removeChild( div );
- all = a = select = opt = input = fragment = div = null;
+ all = select = fragment = opt = a = input = null;
return support;
})();
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 18:06:53 +0000