Core: deprecate jQuery.isFunction

Fixes gh-3609

src/ajax.js

@@ -1,6 +1,7 @@
 define( [
 	"./core",
 	"./var/document",
+	"./var/isFunction",
 	"./var/rnothtmlwhite",
 	"./ajax/var/location",
 	"./ajax/var/nonce",
@@ -11,7 +12,7 @@ define( [
 	"./event/trigger",
 	"./deferred",
 	"./serialize" // jQuery.param
-], function( jQuery, document, rnothtmlwhite, location, nonce, rquery ) {
+], function( jQuery, document, isFunction, rnothtmlwhite, location, nonce, rquery ) {
 
 "use strict";
 
@@ -66,7 +67,7 @@ function addToPrefiltersOrTransports( structure ) {
 			i = 0,
 			dataTypes = dataTypeExpression.toLowerCase().match( rnothtmlwhite ) || [];
 
-		if ( jQuery.isFunction( func ) ) {
+		if ( isFunction( func ) ) {
 
 			// For each dataType in the dataTypeExpression
 			while ( ( dataType = dataTypes[ i++ ] ) ) {
@@ -834,7 +835,7 @@ jQuery.each( [ "get", "post" ], function( i, method ) {
 	jQuery[ method ] = function( url, data, callback, type ) {
 
 		// Shift arguments if data argument was omitted
-		if ( jQuery.isFunction( data ) ) {
+		if ( isFunction( data ) ) {
 			type = type || callback;
 			callback = data;
 			data = undefined;

src/ajax/jsonp.js

@@ -1,9 +1,10 @@
 define( [
 	"../core",
+	"../var/isFunction",
 	"./var/nonce",
 	"./var/rquery",
 	"../ajax"
-], function( jQuery, nonce, rquery ) {
+], function( jQuery, isFunction, nonce, rquery ) {
 
 "use strict";
 
@@ -36,7 +37,7 @@ jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
 	if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {
 
 		// Get callback name, remembering preexisting value associated with it
-		callbackName = s.jsonpCallback = jQuery.isFunction( s.jsonpCallback ) ?
+		callbackName = s.jsonpCallback = isFunction( s.jsonpCallback ) ?
 			s.jsonpCallback() :
 			s.jsonpCallback;
 
@@ -87,7 +88,7 @@ jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
 			}
 
 			// Call if it was a function and we have a response
-			if ( responseContainer && jQuery.isFunction( overwritten ) ) {
+			if ( responseContainer && isFunction( overwritten ) ) {
 				overwritten( responseContainer[ 0 ] );
 			}
 

src/ajax/load.js

@@ -1,12 +1,13 @@
 define( [
 	"../core",
 	"../core/stripAndCollapse",
+	"../var/isFunction",
 	"../core/parseHTML",
 	"../ajax",
 	"../traversing",
 	"../manipulation",
 	"../selector"
-], function( jQuery, stripAndCollapse ) {
+], function( jQuery, stripAndCollapse, isFunction ) {
 
 "use strict";
 
@@ -24,7 +25,7 @@ jQuery.fn.load = function( url, params, callback ) {
 	}
 
 	// If it's a function
-	if ( jQuery.isFunction( params ) ) {
+	if ( isFunction( params ) ) {
 
 		// We assume that it's the callback
 		callback = params;

src/attributes/classes.js

@@ -1,10 +1,11 @@
 define( [
 	"../core",
 	"../core/stripAndCollapse",
+	"../var/isFunction",
 	"../var/rnothtmlwhite",
 	"../data/var/dataPriv",
 	"../core/init"
-], function( jQuery, stripAndCollapse, rnothtmlwhite, dataPriv ) {
+], function( jQuery, stripAndCollapse, isFunction, rnothtmlwhite, dataPriv ) {
 
 "use strict";
 
@@ -27,7 +28,7 @@ jQuery.fn.extend( {
 		var classes, elem, cur, curValue, clazz, j, finalValue,
 			i = 0;
 
-		if ( jQuery.isFunction( value ) ) {
+		if ( isFunction( value ) ) {
 			return this.each( function( j ) {
 				jQuery( this ).addClass( value.call( this, j, getClass( this ) ) );
 			} );
@@ -64,7 +65,7 @@ jQuery.fn.extend( {
 		var classes, elem, cur, curValue, clazz, j, finalValue,
 			i = 0;
 
-		if ( jQuery.isFunction( value ) ) {
+		if ( isFunction( value ) ) {
 			return this.each( function( j ) {
 				jQuery( this ).removeClass( value.call( this, j, getClass( this ) ) );
 			} );
@@ -113,7 +114,7 @@ jQuery.fn.extend( {
 			return stateVal ? this.addClass( value ) : this.removeClass( value );
 		}
 
-		if ( jQuery.isFunction( value ) ) {
+		if ( isFunction( value ) ) {
 			return this.each( function( i ) {
 				jQuery( this ).toggleClass(
 					value.call( this, i, getClass( this ), stateVal ),

src/attributes/val.js

@@ -3,17 +3,18 @@ define( [
 	"../core/stripAndCollapse",
 	"./support",
 	"../core/nodeName",
+	"../var/isFunction",
 
 	"../core/init"
-], function( jQuery, stripAndCollapse, support, nodeName ) {
+], function( jQuery, stripAndCollapse, support, nodeName, isFunction ) {
 
 "use strict";
 
 var rreturn = /\r/g;
 
 jQuery.fn.extend( {
 	val: function( value ) {
-		var hooks, ret, isFunction,
+		var hooks, ret, valueIsFunction,
 			elem = this[ 0 ];
 
 		if ( !arguments.length ) {
@@ -42,7 +43,7 @@ jQuery.fn.extend( {
 			return;
 		}
 
-		isFunction = jQuery.isFunction( value );
+		valueIsFunction = isFunction( value );
 
 		return this.each( function( i ) {
 			var val;
@@ -51,7 +52,7 @@ jQuery.fn.extend( {
 				return;
 			}
 
-			if ( isFunction ) {
+			if ( valueIsFunction ) {
 				val = value.call( this, i, jQuery( this ).val() );
 			} else {
 				val = value;

src/callbacks.js

@@ -1,7 +1,8 @@
 define( [
 	"./core",
+	"./var/isFunction",
 	"./var/rnothtmlwhite"
-], function( jQuery, rnothtmlwhite ) {
+], function( jQuery, isFunction, rnothtmlwhite ) {
 
 "use strict";
 
@@ -125,7 +126,7 @@ jQuery.Callbacks = function( options ) {
 
 					( function add( args ) {
 						jQuery.each( args, function( _, arg ) {
-							if ( jQuery.isFunction( arg ) ) {
+							if ( isFunction( arg ) ) {
 								if ( !options.unique || !self.has( arg ) ) {
 									list.push( arg );
 								}

src/core.js

@@ -16,11 +16,12 @@ define( [
 	"./var/fnToString",
 	"./var/ObjectFunctionString",
 	"./var/support",
+	"./var/isFunction",
 	"./var/isWindow",
 	"./core/DOMEval"
 ], function( arr, document, getProto, slice, concat, push, indexOf,
 	class2type, toString, hasOwn, fnToString, ObjectFunctionString,
-	support, isWindow, DOMEval ) {
+	support, isFunction, isWindow, DOMEval ) {
 
 "use strict";
 
@@ -137,7 +138,7 @@ jQuery.extend = jQuery.fn.extend = function() {
 	}
 
 	// Handle case when target is a string or something (possible in deep copy)
-	if ( typeof target !== "object" && !jQuery.isFunction( target ) ) {
+	if ( typeof target !== "object" && !isFunction( target ) ) {
 		target = {};
 	}
 
@@ -203,15 +204,6 @@ jQuery.extend( {
 
 	noop: function() {},
 
-	isFunction: function( obj ) {
-
-		// Support: Chrome <=57, Firefox <=52
-		// In some browsers, typeof returns "function" for HTML <object> elements
-		// (i.e., `typeof document.createElement( "object" ) === "function"`).
-		// We don't want to classify *any* DOM node as a function.
-		return typeof obj === "function" && typeof obj.nodeType !== "number";
-	},
-
 	isNumeric: function( obj ) {
 
 		// As of jQuery 3.0, isNumeric is limited to
@@ -419,7 +411,7 @@ function isArrayLike( obj ) {
 	var length = !!obj && "length" in obj && obj.length,
 		type = jQuery.type( obj );
 
-	if ( jQuery.isFunction( obj ) || isWindow( obj ) ) {
+	if ( isFunction( obj ) || isWindow( obj ) ) {
 		return false;
 	}
 

src/core/access.js

@@ -1,6 +1,7 @@
 define( [
-	"../core"
-], function( jQuery ) {
+	"../core",
+	"../var/isFunction"
+], function( jQuery, isFunction ) {
 
 "use strict";
 
@@ -22,7 +23,7 @@ var access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
 	} else if ( value !== undefined ) {
 		chainable = true;
 
-		if ( !jQuery.isFunction( value ) ) {
+		if ( !isFunction( value ) ) {
 			raw = true;
 		}
 

src/core/init.js

@@ -2,10 +2,11 @@
 define( [
 	"../core",
 	"../var/document",
+	"../var/isFunction",
 	"./var/rsingleTag",
 
 	"../traversing/findFilter"
-], function( jQuery, document, rsingleTag ) {
+], function( jQuery, document, isFunction, rsingleTag ) {
 
 "use strict";
 
@@ -63,7 +64,7 @@ var rootjQuery,
 						for ( match in context ) {
 
 							// Properties of context are called as methods if possible
-							if ( jQuery.isFunction( this[ match ] ) ) {
+							if ( isFunction( this[ match ] ) ) {
 								this[ match ]( context[ match ] );
 
 							// ...and otherwise set as attributes
@@ -106,7 +107,7 @@ var rootjQuery,
 
 		// HANDLE: $(function)
 		// Shortcut for document ready
-		} else if ( jQuery.isFunction( selector ) ) {
+		} else if ( isFunction( selector ) ) {
 			return root.ready !== undefined ?
 				root.ready( selector ) :
 

src/core/ready-no-deferred.js

@@ -1,7 +1,8 @@
 define( [
 	"../core",
-	"../var/document"
-], function( jQuery, document ) {
+	"../var/document",
+	"../var/isFunction"
+], function( jQuery, document, isFunction ) {
 
 "use strict";
 
@@ -52,7 +53,7 @@ jQuery.extend( {
 
 			while ( readyCallbacks.length ) {
 				fn = readyCallbacks.shift();
-				if ( jQuery.isFunction( fn ) ) {
+				if ( isFunction( fn ) ) {
 					executeReady( fn );
 				}
 			}

src/deferred.js

@@ -1,8 +1,9 @@
 define( [
 	"./core",
+	"./var/isFunction",
 	"./var/slice",
 	"./callbacks"
-], function( jQuery, slice ) {
+], function( jQuery, isFunction, slice ) {
 
 "use strict";
 
@@ -19,11 +20,11 @@ function adoptValue( value, resolve, reject, noValue ) {
 	try {
 
 		// Check for promise aspect first to privilege synchronous behavior
-		if ( value && jQuery.isFunction( ( method = value.promise ) ) ) {
+		if ( value && isFunction( ( method = value.promise ) ) ) {
 			method.call( value ).done( resolve ).fail( reject );
 
 		// Other thenables
-		} else if ( value && jQuery.isFunction( ( method = value.then ) ) ) {
+		} else if ( value && isFunction( ( method = value.then ) ) ) {
 			method.call( value, resolve, reject );
 
 		// Other non-thenables
@@ -81,14 +82,14 @@ jQuery.extend( {
 						jQuery.each( tuples, function( i, tuple ) {
 
 							// Map tuples (progress, done, fail) to arguments (done, fail, progress)
-							var fn = jQuery.isFunction( fns[ tuple[ 4 ] ] ) && fns[ tuple[ 4 ] ];
+							var fn = isFunction( fns[ tuple[ 4 ] ] ) && fns[ tuple[ 4 ] ];
 
 							// deferred.progress(function() { bind to newDefer or newDefer.notify })
 							// deferred.done(function() { bind to newDefer or newDefer.resolve })
 							// deferred.fail(function() { bind to newDefer or newDefer.reject })
 							deferred[ tuple[ 1 ] ]( function() {
 								var returned = fn && fn.apply( this, arguments );
-								if ( returned && jQuery.isFunction( returned.promise ) ) {
+								if ( returned && isFunction( returned.promise ) ) {
 									returned.promise()
 										.progress( newDefer.notify )
 										.done( newDefer.resolve )
@@ -142,7 +143,7 @@ jQuery.extend( {
 										returned.then;
 
 									// Handle a returned thenable
-									if ( jQuery.isFunction( then ) ) {
+									if ( isFunction( then ) ) {
 
 										// Special processors (notify) just wait for resolution
 										if ( special ) {
@@ -238,7 +239,7 @@ jQuery.extend( {
 							resolve(
 								0,
 								newDefer,
-								jQuery.isFunction( onProgress ) ?
+								isFunction( onProgress ) ?
 									onProgress :
 									Identity,
 								newDefer.notifyWith
@@ -250,7 +251,7 @@ jQuery.extend( {
 							resolve(
 								0,
 								newDefer,
-								jQuery.isFunction( onFulfilled ) ?
+								isFunction( onFulfilled ) ?
 									onFulfilled :
 									Identity
 							)
@@ -261,7 +262,7 @@ jQuery.extend( {
 							resolve(
 								0,
 								newDefer,
-								jQuery.isFunction( onRejected ) ?
+								isFunction( onRejected ) ?
 									onRejected :
 									Thrower
 							)
@@ -379,7 +380,7 @@ jQuery.extend( {
 
 			// Use .then() to unwrap secondary thenables (cf. gh-3000)
 			if ( master.state() === "pending" ||
-				jQuery.isFunction( resolveValues[ i ] && resolveValues[ i ].then ) ) {
+				isFunction( resolveValues[ i ] && resolveValues[ i ].then ) ) {
 
 				return master.then();
 			}