Misc: Drop support for older browsers; update support comments

That includes Opera 12.x, Firefox<29, Safari<6.0 and some hacks
for old Blackberry.

Closes gh-1820
Refs gh-1815

11 files changed, 28 insertions, 64 deletions

diff --git a/src/attributes/support.js b/src/attributes/support.js
index 5db5c5212..bc5eb472e 100644
--- a/src/attributes/support.js
+++ b/src/attributes/support.js
@@ -9,7 +9,7 @@ define([
 
 	input.type = "checkbox";
 
-	// Support: iOS<=5.1, Android<=4.2+
+	// Support: Android<4.4
 	// Default value for a checkbox should be "on"
 	support.checkOn = input.value !== "";
 
diff --git a/src/core.js b/src/core.js
index 2b3fbb180..0dd80dd33 100644
--- a/src/core.js
+++ b/src/core.js
@@ -250,7 +250,7 @@ jQuery.extend({
 		if ( obj == null ) {
 			return obj + "";
 		}
-		// Support: Android<4.0, iOS<6 (functionish RegExp)
+		// Support: Android<4.0 (functionish RegExp)
 		return typeof obj === "object" || typeof obj === "function" ?
 			class2type[ toString.call(obj) ] || "object" :
 			typeof obj;
@@ -354,6 +354,8 @@ jQuery.extend({
 		return arr == null ? -1 : indexOf.call( arr, elem, i );
 	},
 
+	// Support: Android<4.1, PhantomJS<2
+	// push.apply(_, arraylike) throws on ancient WebKit
 	merge: function( first, second ) {
 		var len = +second.length,
 			j = 0,
diff --git a/src/core/init.js b/src/core/init.js
index 50f310c56..9beaedd04 100644
--- a/src/core/init.js
+++ b/src/core/init.js
@@ -69,9 +69,7 @@ var rootjQuery,
 				} else {
 					elem = document.getElementById( match[2] );
 
-					// Support: Blackberry 4.6
-					// gEBID returns nodes no longer in the document (#6963)
-					if ( elem && elem.parentNode ) {
+					if ( elem ) {
 						// Inject the element directly into the jQuery object
 						this.length = 1;
 						this[0] = elem;
diff --git a/src/css.js b/src/css.js
index 94a1d234f..d8e60b857 100644
--- a/src/css.js
+++ b/src/css.js
@@ -34,7 +34,7 @@ var
 		fontWeight: "400"
 	},
 
-	cssPrefixes = [ "Webkit", "O", "Moz", "ms" ];
+	cssPrefixes = [ "Webkit", "Moz", "ms" ];
 
 // Return a css property mapped to a potentially vendor prefixed property
 function vendorPropName( style, name ) {
diff --git a/src/css/curCSS.js b/src/css/curCSS.js
index 420d19fa9..260184b47 100644
--- a/src/css/curCSS.js
+++ b/src/css/curCSS.js
@@ -7,8 +7,7 @@ define([
 ], function( jQuery, rnumnonpx, rmargin, getStyles ) {
 
 function curCSS( elem, name, computed ) {
-	var width, minWidth, maxWidth, ret,
-		style = elem.style;
+	var ret;
 
 	computed = computed || getStyles( elem );
 
@@ -23,33 +22,10 @@ function curCSS( elem, name, computed ) {
 		if ( ret === "" && !jQuery.contains( elem.ownerDocument, elem ) ) {
 			ret = jQuery.style( elem, name );
 		}
-
-		// Support: iOS < 6
-		// A tribute to the "awesome hack by Dean Edwards"
-		// iOS < 6 (at least) returns percentage for a larger set of values,
-		// but width seems to be reliably pixels
-		// this is against the CSSOM draft spec:
-		// http://dev.w3.org/csswg/cssom/#resolved-values
-		if ( rnumnonpx.test( ret ) && rmargin.test( name ) ) {
-
-			// Remember the original values
-			width = style.width;
-			minWidth = style.minWidth;
-			maxWidth = style.maxWidth;
-
-			// Put in the new values to get a computed value out
-			style.minWidth = style.maxWidth = style.width = ret;
-			ret = computed.width;
-
-			// Revert the changed values
-			style.width = width;
-			style.minWidth = minWidth;
-			style.maxWidth = maxWidth;
-		}
 	}
 
 	return ret !== undefined ?
-		// Support: IE
+		// Support: IE9-11+
 		// IE returns zIndex value as an integer.
 		ret + "" :
 		ret;
diff --git a/src/css/hiddenVisibleSelectors.js b/src/css/hiddenVisibleSelectors.js
index 2b1eb8155..01ecc3396 100644
--- a/src/css/hiddenVisibleSelectors.js
+++ b/src/css/hiddenVisibleSelectors.js
@@ -4,11 +4,9 @@ define([
 ], function( jQuery ) {
 
 jQuery.expr.filters.hidden = function( elem ) {
-	// Support: Opera <= 12.12
-	// Opera reports offsetWidths and offsetHeights less than zero on some elements
 	// Use OR instead of AND as the element is not visible if either is true
 	// See tickets #10406 and #13132
-	return elem.offsetWidth <= 0 || elem.offsetHeight <= 0;
+	return !elem.offsetWidth || !elem.offsetHeight;
 };
 jQuery.expr.filters.visible = function( elem ) {
 	return !jQuery.expr.filters.hidden( elem );
diff --git a/src/css/support.js b/src/css/support.js
index 2cb6fe81d..4279d12e7 100644
--- a/src/css/support.js
+++ b/src/css/support.js
@@ -27,10 +27,10 @@ define([
 	// so they're executed at the same time to save the second computation.
 	function computePixelPositionAndBoxSizingReliable() {
 		div.style.cssText =
-			// Support: Firefox<29, Android 2.3
+			// Support: Android 2.3
 			// Vendor-prefix box-sizing
-			"-webkit-box-sizing:border-box;-moz-box-sizing:border-box;" +
-			"box-sizing:border-box;display:block;margin-top:1%;top:1%;" +
+			"-webkit-box-sizing:border-box;box-sizing:border-box;" +
+			"display:block;margin-top:1%;top:1%;" +
 			"border:1px;padding:1px;width:4px;position:absolute";
 		div.innerHTML = "";
 		docElem.appendChild( container );
@@ -72,10 +72,10 @@ define([
 
 				// Reset CSS: box-sizing; display; margin; border; padding
 				marginDiv.style.cssText = div.style.cssText =
-					// Support: Firefox<29, Android 2.3
+					// Support: Android 2.3
 					// Vendor-prefix box-sizing
-					"-webkit-box-sizing:content-box;-moz-box-sizing:content-box;" +
-					"box-sizing:content-box;display:block;margin:0;border:0;padding:0";
+					"-webkit-box-sizing:content-box;box-sizing:content-box;" +
+					"display:block;margin:0;border:0;padding:0";
 				marginDiv.style.marginRight = marginDiv.style.width = "0";
 				div.style.width = "1px";
 				docElem.appendChild( container );
diff --git a/src/event.js b/src/event.js
index 7cf14c5c9..aee6cb78f 100644
--- a/src/event.js
+++ b/src/event.js
@@ -536,13 +536,7 @@ jQuery.event = {
 			event[ prop ] = originalEvent[ prop ];
 		}
 
-		// Support: Cordova 2.5 (WebKit) (#13255)
-		// All events should have a target; Cordova deviceready doesn't
-		if ( !event.target ) {
-			event.target = document;
-		}
-
-		// Support: Safari 6.0+, Chrome<28
+		// Support: Safari 6.0+
 		// Target should not be a text node (#504, #13143)
 		if ( event.target.nodeType === 3 ) {
 			event.target = event.target.parentNode;
@@ -709,7 +703,10 @@ jQuery.Event.prototype = {
 };
 
 // Create mouseenter/leave events using mouseover/out and event-time checks
-// Support: Chrome 15+
+// so that event delegation works in jQuery.
+// Do the same for pointerenter/pointerleave and pointerover/pointerout
+// Support: Safari<7.0
+// Safari doesn't support mouseenter/mouseleave at all.
 jQuery.each({
 	mouseenter: "mouseover",
 	mouseleave: "mouseout",
diff --git a/src/manipulation.js b/src/manipulation.js
index 0b2637db6..52b83c71b 100644
--- a/src/manipulation.js
+++ b/src/manipulation.js
@@ -204,7 +204,7 @@ jQuery.extend({
 
 				// Add nodes directly
 				if ( jQuery.type( elem ) === "object" ) {
-					// Support: QtWebKit, PhantomJS
+					// Support: Android<4.1, PhantomJS<2
 					// push.apply(_, arraylike) throws on ancient WebKit
 					jQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );
 
@@ -227,7 +227,7 @@ jQuery.extend({
 						tmp = tmp.lastChild;
 					}
 
-					// Support: QtWebKit, PhantomJS
+					// Support: Android<4.1, PhantomJS<2
 					// push.apply(_, arraylike) throws on ancient WebKit
 					jQuery.merge( nodes, tmp.childNodes );
 
@@ -514,8 +514,8 @@ jQuery.fn.extend({
 
 						// Keep references to cloned scripts for later restoration
 						if ( hasScripts ) {
-							// Support: QtWebKit
-							// jQuery.merge because push.apply(_, arraylike) throws
+							// Support: Android<4.1, PhantomJS<2
+							// push.apply(_, arraylike) throws on ancient WebKit
 							jQuery.merge( scripts, getAll( node, "script" ) );
 						}
 					}
@@ -572,8 +572,8 @@ jQuery.each({
 			elems = i === last ? this : this.clone( true );
 			jQuery( insert[ i ] )[ original ]( elems );
 
-			// Support: QtWebKit
-			// .get() because push.apply(_, arraylike) throws
+			// Support: Android<4.1, PhantomJS<2
+			// .get() because push.apply(_, arraylike) throws on ancient WebKit
 			push.apply( ret, elems.get() );
 		}
 
diff --git a/src/manipulation/support.js b/src/manipulation/support.js
index 822a014f5..92c92b5ff 100644
--- a/src/manipulation/support.js
+++ b/src/manipulation/support.js
@@ -7,17 +7,14 @@ define([
 		div = fragment.appendChild( document.createElement( "div" ) ),
 		input = document.createElement( "input" );
 
-	// Support: Safari<=5.1
-	// Check state lost if the name is set (#11217)
 	// Support: Windows Web Apps (WWA)
 	// `name` and `type` must use .setAttribute for WWA (#14901)
 	input.setAttribute( "type", "radio" );
 	input.setAttribute( "checked", "checked" );
-	input.setAttribute( "name", "t" );
 
 	div.appendChild( input );
 
-	// Support: Safari<=5.1, Android<4.2
+	// Support: Android<4.2
 	// Older WebKit doesn't clone checked state correctly in fragments
 	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;
 
diff --git a/src/offset.js b/src/offset.js
index ffd049157..aee95efde 100644
--- a/src/offset.js
+++ b/src/offset.js
@@ -96,11 +96,7 @@ jQuery.fn.extend({
 			return box;
 		}
 
-		// Support: BlackBerry 5, iOS 3 (original iPhone)
-		// If we don't have gBCR, just use 0,0 rather than error
-		if ( elem.getBoundingClientRect ) {
-			box = elem.getBoundingClientRect();
-		}
+		box = elem.getBoundingClientRect();
 		win = getWindow( doc );
 		return {
 			top: box.top + win.pageYOffset - docElem.clientTop,