Core: Drop support for IE <11, iOS <11, Firefox <65, Android Browser & PhantomJS

Also, update support comments format to match format described in:
https://github.com/jquery/contribute.jquery.org/issues/95#issuecomment-69379197
with the change from:
https://github.com/jquery/contribute.jquery.org/issues/95#issuecomment-448998379
(open-ended ranges end with `+`).

Fixes gh-3950
Fixes gh-4299
Closes gh-4347

1 files changed, 5 insertions, 38 deletions

diff --git a/src/css/curCSS.js b/src/css/curCSS.js
index 98a594a77..111285b2e 100644
--- a/src/css/curCSS.js
+++ b/src/css/curCSS.js
@@ -1,61 +1,28 @@
 define( [
 	"../core",
 	"../core/isAttached",
-	"./var/rboxStyle",
-	"./var/rnumnonpx",
-	"./var/getStyles",
-	"./support"
-], function( jQuery, isAttached, rboxStyle, rnumnonpx, getStyles, support ) {
+	"./var/getStyles"
+], function( jQuery, isAttached, rboxStyle, getStyles ) {
 
 "use strict";
 
 function curCSS( elem, name, computed ) {
-	var width, minWidth, maxWidth, ret,
-
-		// Support: Firefox 51+
-		// Retrieving style before computed somehow
-		// fixes an issue with getting wrong values
-		// on detached elements
-		style = elem.style;
+	var ret;
 
 	computed = computed || getStyles( elem );
 
-	// getPropertyValue is needed for:
-	//   .css('filter') (IE 9 only, #12537)
-	//   .css('--customProperty) (#3144)
+	// getPropertyValue is needed for `.css('--customProperty')` (gh-3144)
 	if ( computed ) {
 		ret = computed.getPropertyValue( name ) || computed[ name ];
 
 		if ( ret === "" && !isAttached( elem ) ) {
 			ret = jQuery.style( elem, name );
 		}
-
-		// A tribute to the "awesome hack by Dean Edwards"
-		// Android Browser returns percentage for some values,
-		// but width seems to be reliably pixels.
-		// This is against the CSSOM draft spec:
-		// https://drafts.csswg.org/cssom/#resolved-values
-		if ( !support.pixelBoxStyles() && rnumnonpx.test( ret ) && rboxStyle.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 <=9 - 11 only
+		// Support: IE <=9 - 11+
 		// IE returns zIndex value as an integer.
 		ret + "" :
 		ret;