9 files changed, 25 insertions, 61 deletions
diff --git a/src/core/DOMEval.js b/src/core/DOMEval.js
index 59f6e0247..df83cca52 100644
--- a/src/core/DOMEval.js
+++ b/src/core/DOMEval.js
@@ -20,7 +20,7 @@ define( [
 		if ( node ) {
 			for ( i in preservedScriptAttributes ) {
 
-				// Support: Firefox 64+, Edge 18+
+				// Support: Firefox <=64 - 66+, Edge <=18+
 				// Some browsers don't support the "nonce" property on scripts.
 				// On the other hand, just using `getAttribute` is not enough as
 				// the `nonce` attribute is reset to an empty string whenever it
diff --git a/src/core/access.js b/src/core/access.js
index 842c4a42b..f600600d5 100644
--- a/src/core/access.js
+++ b/src/core/access.js
@@ -1,8 +1,7 @@
 define( [
 	"../core",
-	"../core/toType",
-	"../var/isFunction"
-], function( jQuery, toType, isFunction ) {
+	"../core/toType"
+], function( jQuery, toType ) {
 
 "use strict";
 
@@ -24,7 +23,7 @@ var access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
 	} else if ( value !== undefined ) {
 		chainable = true;
 
-		if ( !isFunction( value ) ) {
+		if ( typeof value !== "function" ) {
 			raw = true;
 		}
 
diff --git a/src/core/init.js b/src/core/init.js
index 8865238c8..71f30e926 100644
--- a/src/core/init.js
+++ b/src/core/init.js
@@ -2,11 +2,10 @@
 define( [
 	"../core",
 	"../var/document",
-	"../var/isFunction",
 	"./var/rsingleTag",
 
 	"../traversing/findFilter"
-], function( jQuery, document, isFunction, rsingleTag ) {
+], function( jQuery, document, rsingleTag ) {
 
 "use strict";
 
@@ -64,7 +63,7 @@ var rootjQuery,
 						for ( match in context ) {
 
 							// Properties of context are called as methods if possible
-							if ( isFunction( this[ match ] ) ) {
+							if ( typeof this[ match ] === "function" ) {
 								this[ match ]( context[ match ] );
 
 							// ...and otherwise set as attributes
@@ -107,7 +106,7 @@ var rootjQuery,
 
 		// HANDLE: $(function)
 		// Shortcut for document ready
-		} else if ( isFunction( selector ) ) {
+		} else if ( typeof selector === "function" ) {
 			return root.ready !== undefined ?
 				root.ready( selector ) :
 
diff --git a/src/core/isAttached.js b/src/core/isAttached.js
index efa2465a9..1acf15714 100644
--- a/src/core/isAttached.js
+++ b/src/core/isAttached.js
@@ -10,8 +10,9 @@ define( [
 		},
 		composed = { composed: true };
 
+	// Support: IE 9 - 11+, Edge 12 - 18+
 	// Check attachment across shadow DOM boundaries when possible (gh-3504)
-	if ( documentElement.attachShadow ) {
+	if ( documentElement.getRootNode ) {
 		isAttached = function( elem ) {
 			return jQuery.contains( elem.ownerDocument, elem ) ||
 				elem.getRootNode( composed ) === elem.ownerDocument;
diff --git a/src/core/parseHTML.js b/src/core/parseHTML.js
index 21ff6bfa7..8c5268fb1 100644
--- a/src/core/parseHTML.js
+++ b/src/core/parseHTML.js
@@ -2,11 +2,8 @@ define( [
 	"../core",
 	"../var/document",
 	"./var/rsingleTag",
-	"../manipulation/buildFragment",
-
-	// This is the only module that needs core/support
-	"./support"
-], function( jQuery, document, rsingleTag, buildFragment, support ) {
+	"../manipulation/buildFragment"
+], function( jQuery, document, rsingleTag, buildFragment ) {
 
 "use strict";
 
@@ -29,18 +26,14 @@ jQuery.parseHTML = function( data, context, keepScripts ) {
 
 		// Stop scripts or inline event handlers from being executed immediately
 		// by using document.implementation
-		if ( support.createHTMLDocument ) {
-			context = document.implementation.createHTMLDocument( "" );
-
-			// Set the base href for the created document
-			// so any parsed elements with URLs
-			// are based on the document's URL (gh-2965)
-			base = context.createElement( "base" );
-			base.href = document.location.href;
-			context.head.appendChild( base );
-		} else {
-			context = document;
-		}
+		context = document.implementation.createHTMLDocument( "" );
+
+		// Set the base href for the created document
+		// so any parsed elements with URLs
+		// are based on the document's URL (gh-2965)
+		base = context.createElement( "base" );
+		base.href = document.location.href;
+		context.head.appendChild( base );
 	}
 
 	parsed = rsingleTag.exec( data );
diff --git a/src/core/ready-no-deferred.js b/src/core/ready-no-deferred.js
index 4428020ef..2c3fc1b84 100644
--- a/src/core/ready-no-deferred.js
+++ b/src/core/ready-no-deferred.js
@@ -1,8 +1,7 @@
 define( [
 	"../core",
-	"../var/document",
-	"../var/isFunction"
-], function( jQuery, document, isFunction ) {
+	"../var/document"
+], function( jQuery, document ) {
 
 "use strict";
 
@@ -53,7 +52,7 @@ jQuery.extend( {
 
 			while ( readyCallbacks.length ) {
 				fn = readyCallbacks.shift();
-				if ( isFunction( fn ) ) {
+				if ( typeof fn === "function" ) {
 					executeReady( fn );
 				}
 			}
@@ -77,10 +76,7 @@ function completed() {
 
 // Catch cases where $(document).ready() is called
 // after the browser event has already occurred.
-// Support: IE9-10 only
-// Older IE sometimes signals "interactive" too soon
-if ( document.readyState === "complete" ||
-	( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
+if ( document.readyState !== "loading" ) {
 
 	// Handle it asynchronously to allow scripts the opportunity to delay ready
 	window.setTimeout( jQuery.ready );
diff --git a/src/core/ready.js b/src/core/ready.js
index 794feeec0..3abb6c03a 100644
--- a/src/core/ready.js
+++ b/src/core/ready.js
@@ -66,10 +66,7 @@ function completed() {
 
 // Catch cases where $(document).ready() is called
 // after the browser event has already occurred.
-// Support: IE <=9 - 10 only
-// Older IE sometimes signals "interactive" too soon
-if ( document.readyState === "complete" ||
-	( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
+if ( document.readyState !== "loading" ) {
 
 	// Handle it asynchronously to allow scripts the opportunity to delay ready
 	window.setTimeout( jQuery.ready );
diff --git a/src/core/support.js b/src/core/support.js
deleted file mode 100644
index 13ae02f08..000000000
--- a/src/core/support.js
+++ /dev/null
@@ -1,20 +0,0 @@
-define( [
-	"../var/document",
-	"../var/support"
-], function( document, support ) {
-
-"use strict";
-
-// Support: Safari 8 only
-// In Safari 8 documents created via document.implementation.createHTMLDocument
-// collapse sibling forms: the second one becomes a child of the first one.
-// Because of that, this security measure has to be disabled in Safari 8.
-// https://bugs.webkit.org/show_bug.cgi?id=137337
-support.createHTMLDocument = ( function() {
-	var body = document.implementation.createHTMLDocument( "" ).body;
-	body.innerHTML = "<form></form><form></form>";
-	return body.childNodes.length === 2;
-} )();
-
-return support;
-} );
diff --git a/src/core/toType.js b/src/core/toType.js
index c77ba95ad..c555ef9df 100644
--- a/src/core/toType.js
+++ b/src/core/toType.js
@@ -10,8 +10,7 @@ function toType( obj ) {
 		return obj + "";
 	}
 
-	// Support: Android <=2.3 only (functionish RegExp)
-	return typeof obj === "object" || typeof obj === "function" ?
+	return typeof obj === "object" ?
 		class2type[ toString.call( obj ) ] || "object" :
 		typeof obj;
 }