diff --git a/assets/js/admin/meta-boxes-variations.js b/assets/js/admin/meta-boxes-variations.js
index 375b138dd60..ea3d6e4d493 100644
--- a/assets/js/admin/meta-boxes-variations.js
+++ b/assets/js/admin/meta-boxes-variations.js
@@ -1,30 +1,37 @@
-jQuery( function($){
+/* global wp, woocommerce_admin_meta_boxes_variations */
+jQuery( function ( $ ) {
 
 	var variation_sortable_options = {
-		items:'.woocommerce_variation',
-		cursor:'move',
-		axis:'y',
+		items: '.woocommerce_variation',
+		cursor: 'move',
+		axis: 'y',
 		handle: 'h3',
-		scrollSensitivity:40,
+		scrollSensitivity: 40,
 		forcePlaceholderSize: true,
 		helper: 'clone',
 		opacity: 0.65,
 		placeholder: 'wc-metabox-sortable-placeholder',
-		start:function(event,ui){
-			ui.item.css('background-color','#f6f6f6');
+		start: function( event, ui ) {
+			ui.item.css( 'background-color', '#f6f6f6' );
 		},
-		stop:function(event,ui){
-			ui.item.removeAttr('style');
+		stop: function ( event, ui ) {
+			ui.item.removeAttr( 'style' );
 			variation_row_indexes();
 		}
 	};
 
 	// Add a variation
-	jQuery('#variable_product_options').on('click', 'button.add_variation', function(){
+	$( '#variable_product_options' ).on( 'click', 'button.add_variation', function () {
 
-		jQuery('.woocommerce_variations').block({ message: null, overlayCSS: { background: '#fff url(' + woocommerce_admin_meta_boxes_variations.plugin_url + '/assets/images/ajax-loader.gif) no-repeat center', opacity: 0.6 } });
+		$('.woocommerce_variations').block({
+			message: null,
+			overlayCSS: {
+				background: '#fff url(' + woocommerce_admin_meta_boxes_variations.plugin_url + '/assets/images/ajax-loader.gif) no-repeat center',
+				opacity: 0.6
+			}
+		});
 
-		var loop = jQuery('.woocommerce_variation').size();
+		var loop = $('.woocommerce_variation').size();
 
 		var data = {
 			action: 'woocommerce_add_variation',
@@ -33,33 +40,39 @@ jQuery( function($){
 			security: woocommerce_admin_meta_boxes_variations.add_variation_nonce
 		};
 
-		jQuery.post( woocommerce_admin_meta_boxes_variations.ajax_url, data, function(response) {
+		$.post( woocommerce_admin_meta_boxes_variations.ajax_url, data, function ( response ) {
 
-			jQuery('.woocommerce_variations').append( response );
+			$( '.woocommerce_variations' ).append( response );
 
-			jQuery(".tips").tipTip({
-				'attribute' : 'data-tip',
-				'fadeIn' : 50,
-				'fadeOut' : 50
+			$( '.tips' ).tipTip({
+				'attribute': 'data-tip',
+				'fadeIn': 50,
+				'fadeOut': 50
 			});
 
-			jQuery('input.variable_is_downloadable, input.variable_is_virtual').change();
+			$( 'input.variable_is_downloadable, input.variable_is_virtual' ).change();
 
-			jQuery('.woocommerce_variations').unblock();
-			jQuery('#variable_product_options').trigger('woocommerce_variations_added');
+			$( '.woocommerce_variations' ).unblock();
+			$( '#variable_product_options' ).trigger( 'woocommerce_variations_added' );
 		});
 
 		return false;
 
 	});
 
-	jQuery('#variable_product_options').on('click', 'button.link_all_variations', function() {
+	$( '#variable_product_options').on( 'click', 'button.link_all_variations', function () {
 
-		var answer = confirm( woocommerce_admin_meta_boxes_variations.i18n_link_all_variations );
+		var answer = window.confirm( woocommerce_admin_meta_boxes_variations.i18n_link_all_variations );
 
-		if (answer) {
+		if ( answer ) {
 
-			jQuery('#variable_product_options').block({ message: null, overlayCSS: { background: '#fff url(' + woocommerce_admin_meta_boxes_variations.plugin_url + '/assets/images/ajax-loader.gif) no-repeat center', opacity: 0.6 } });
+			$( '#variable_product_options' ).block({
+				message: null,
+				overlayCSS: {
+					background: '#fff url(' + woocommerce_admin_meta_boxes_variations.plugin_url + '/assets/images/ajax-loader.gif) no-repeat center',
+					opacity: 0.6
+				}
+			});
 
 			var data = {
 				action: 'woocommerce_link_all_variations',
@@ -67,53 +80,59 @@ jQuery( function($){
 				security: woocommerce_admin_meta_boxes_variations.link_variation_nonce
 			};
 
-			jQuery.post( woocommerce_admin_meta_boxes_variations.ajax_url, data, function(response) {
+			$.post( woocommerce_admin_meta_boxes_variations.ajax_url, data, function ( response ) {
 
-				var count = parseInt( response );
+				var count = parseInt( response, 10 );
 
-				if (count==1) {
-					alert( count + ' ' + woocommerce_admin_meta_boxes_variations.i18n_variation_added );
-				} else if (count==0 || count>1) {
-					alert( count + ' ' + woocommerce_admin_meta_boxes_variations.i18n_variations_added );
+				if ( 1 === count ) {
+					window.alert( count + ' ' + woocommerce_admin_meta_boxes_variations.i18n_variation_added );
+				} else if ( 0 === count || count > 1 ) {
+					window.alert( count + ' ' + woocommerce_admin_meta_boxes_variations.i18n_variations_added );
 				} else {
-					alert( woocommerce_admin_meta_boxes_variations.i18n_no_variations_added );
+					window.alert( woocommerce_admin_meta_boxes_variations.i18n_no_variations_added );
 				}
 
-				if (count>0) {
+				if ( count > 0 ) {
 					var this_page = window.location.toString();
 
 					this_page = this_page.replace( 'post-new.php?', 'post.php?post=' + woocommerce_admin_meta_boxes_variations.post_id + '&action=edit&' );
 
-					$('#variable_product_options').load( this_page + ' #variable_product_options_inner', function() {
-						$('#variable_product_options').unblock();
-						jQuery('#variable_product_options').trigger('woocommerce_variations_added');
+					$( '#variable_product_options' ).load( this_page + ' #variable_product_options_inner', function () {
+						$( '#variable_product_options' ).unblock();
+						$( '#variable_product_options' ).trigger( 'woocommerce_variations_added' );
 
-						jQuery(".tips").tipTip({
-							'attribute' : 'data-tip',
-							'fadeIn' : 50,
-							'fadeOut' : 50
+						$( '.tips' ).tipTip({
+							'attribute': 'data-tip',
+							'fadeIn': 50,
+							'fadeOut': 50
 						});
 					} );
 				} else {
-					$('#variable_product_options').unblock();
+					$( '#variable_product_options' ).unblock();
 				}
 			});
 		}
 		return false;
 	});
 
-	jQuery('#variable_product_options').on('click', 'button.remove_variation', function(e){
+	$( '#variable_product_options' ).on( 'click', 'button.remove_variation', function ( e ) {
 		e.preventDefault();
-		var answer = confirm( woocommerce_admin_meta_boxes_variations.i18n_remove_variation );
-		if (answer){
+		var answer = window.confirm( woocommerce_admin_meta_boxes_variations.i18n_remove_variation );
+		if ( answer ) {
 
-			var el = jQuery(this).parent().parent();
+			var el = $( this ).parent().parent();
 
-			var variation = jQuery(this).attr('rel');
+			var variation = $( this ).attr( 'rel' );
 
-			if (variation>0) {
+			if ( variation > 0 ) {
 
-				jQuery(el).block({ message: null, overlayCSS: { background: '#fff url(' + woocommerce_admin_meta_boxes_variations.plugin_url + '/assets/images/ajax-loader.gif) no-repeat center', opacity: 0.6 } });
+				$( el ).block({
+					message: null,
+					overlayCSS: {
+						background: '#fff url(' + woocommerce_admin_meta_boxes_variations.plugin_url + '/assets/images/ajax-loader.gif) no-repeat center',
+						opacity: 0.6
+					}
+				});
 
 				var data = {
 					action: 'woocommerce_remove_variation',
@@ -121,16 +140,16 @@ jQuery( function($){
 					security: woocommerce_admin_meta_boxes_variations.delete_variation_nonce
 				};
 
-				jQuery.post(woocommerce_admin_meta_boxes_variations.ajax_url, data, function(response) {
+				$.post( woocommerce_admin_meta_boxes_variations.ajax_url, data, function ( response ) {
 					// Success
-					jQuery(el).fadeOut('300', function(){
-						jQuery(el).remove();
+					$( el ).fadeOut( '300', function () {
+						$( el ).remove();
 					});
 				});
 
 			} else {
-				jQuery(el).fadeOut('300', function(){
-					jQuery(el).remove();
+				$( el ).fadeOut( '300', function () {
+					$( el ).remove();
 				});
 			}
 
@@ -138,42 +157,51 @@ jQuery( function($){
 		return false;
 	});
 
-	jQuery('.wc-metaboxes-wrapper').on('click', 'a.bulk_edit', function(event){
-		var bulk_edit  = jQuery('select#field_to_edit').val();
+	$( '.wc-metaboxes-wrapper' ).on( 'click', 'a.bulk_edit', function ( event ) {
+		var bulk_edit  = $( 'select#field_to_edit' ).val(),
+			checkbox,
+			answer,
+			value;
 
-		switch( bulk_edit ) {
-			case 'toggle_enabled':
-				var checkbox = jQuery('input[name^="variable_enabled"]');
-				checkbox.attr('checked', !checkbox.attr('checked'));
+		switch ( bulk_edit ) {
+			case 'toggle_enabled' :
+				checkbox = $( 'input[name^="variable_enabled"]' );
+				checkbox.attr('checked', ! checkbox.attr( 'checked' ) );
 			break;
-			case 'toggle_downloadable':
-				var checkbox = jQuery('input[name^="variable_is_downloadable"]');
-				checkbox.attr('checked', !checkbox.attr('checked'));
-				jQuery('input.variable_is_downloadable').change();
+			case 'toggle_downloadable' :
+				checkbox = $( 'input[name^="variable_is_downloadable"]' );
+				checkbox.attr( 'checked', ! checkbox.attr( 'checked' ) );
+				$('input.variable_is_downloadable').change();
 			break;
-			case 'toggle_virtual':
-				var checkbox = jQuery('input[name^="variable_is_virtual"]');
-				checkbox.attr('checked', !checkbox.attr('checked'));
-				jQuery('input.variable_is_virtual').change();
+			case 'toggle_virtual' :
+				checkbox = $('input[name^="variable_is_virtual"]');
+				checkbox.attr( 'checked', ! checkbox.attr( 'checked' ) );
+				$( 'input.variable_is_virtual' ).change();
 			break;
-			case 'delete_all':
-				var answer = confirm( woocommerce_admin_meta_boxes_variations.i18n_delete_all_variations );
+			case 'delete_all' :
+				answer = window.confirm( woocommerce_admin_meta_boxes_variations.i18n_delete_all_variations );
 
-				if (answer){
+				if ( answer ) {
 
-					var answer = confirm( woocommerce_admin_meta_boxes_variations.i18n_last_warning );
+					answer = window.confirm( woocommerce_admin_meta_boxes_variations.i18n_last_warning );
 
-					if (answer) {
+					if ( answer ) {
 
 						var variation_ids = [];
 
-						jQuery('.woocommerce_variations .woocommerce_variation').block({ message: null, overlayCSS: { background: '#fff url(' + woocommerce_admin_meta_boxes_variations.plugin_url + '/assets/images/ajax-loader.gif) no-repeat center', opacity: 0.6 } });
+						$( '.woocommerce_variations .woocommerce_variation' ).block({
+							message: null,
+							overlayCSS: {
+								background: '#fff url(' + woocommerce_admin_meta_boxes_variations.plugin_url + '/assets/images/ajax-loader.gif) no-repeat center',
+								opacity: 0.6
+							}
+						});
 
-						jQuery('.woocommerce_variations .woocommerce_variation .remove_variation').each(function(){
+						$( '.woocommerce_variations .woocommerce_variation .remove_variation' ).each( function () {
 
-							var variation = jQuery(this).attr('rel');
-							if (variation>0) {
-								variation_ids.push(variation);
+							var variation = $( this ).attr( 'rel' );
+							if ( variation > 0 ) {
+								variation_ids.push( variation );
 							}
 						});
 
@@ -183,9 +211,9 @@ jQuery( function($){
 							security: woocommerce_admin_meta_boxes_variations.delete_variations_nonce
 						};
 
-						jQuery.post(woocommerce_admin_meta_boxes_variations.ajax_url, data, function(response) {
-							jQuery('.woocommerce_variations .woocommerce_variation').fadeOut('300', function(){
-								jQuery('.woocommerce_variations .woocommerce_variation').remove();
+						$.post( woocommerce_admin_meta_boxes_variations.ajax_url, data, function( response ) {
+							$( '.woocommerce_variations .woocommerce_variation' ).fadeOut( '300', function () {
+								$( '.woocommerce_variations .woocommerce_variation' ).remove();
 							});
 						});
 					}
@@ -195,27 +223,32 @@ jQuery( function($){
 			case 'variable_regular_price_decrease':
 			case 'variable_sale_price_increase':
 			case 'variable_sale_price_decrease':
-				if ( bulk_edit.lastIndexOf( 'variable_regular_price', 0 ) === 0 )
-					var edit_field = 'variable_regular_price';
-				else
-					var edit_field = 'variable_sale_price';
+				var edit_field;
+				if ( bulk_edit.lastIndexOf( 'variable_regular_price', 0 ) === 0 ) {
+					edit_field = 'variable_regular_price';
+				} else {
+					edit_field = 'variable_sale_price';
+				}
 
-				var value = prompt( woocommerce_admin_meta_boxes_variations.i18n_enter_a_value_fixed_or_percent );
+				value = window.prompt( woocommerce_admin_meta_boxes_variations.i18n_enter_a_value_fixed_or_percent );
 
-				jQuery( ':input[name^="' + edit_field + '["]').each(function() {
-					var current_value = Number( jQuery(this).val() );
+				$( ':input[name^="' + edit_field + '["]' ).each( function () {
+					var current_value = Number( $( this ).val() ),
+						new_value;
 
-					if ( value.toString().indexOf("%") >= 0 )
-						value = Number( ( Number( current_value ) / 100 ) * Number( value.replace(/\%/, "" ) ) );
-					else
+					if ( value.toString().indexOf( '%' ) >= 0 ) {
+						value = Number( ( Number( current_value ) / 100 ) * Number( value.replace(/\%/, '' ) ) );
+					} else {
 						value = Number( value );
+					}
 
-					if ( bulk_edit.indexOf( "increase" ) != -1 )
-						var new_value = current_value + value;
-					else
-						var new_value = current_value - value;
+					if ( bulk_edit.indexOf( 'increase' ) !== -1 ) {
+						new_value = current_value + value;
+					} else {
+						new_value = current_value - value;
+					}
 
-					jQuery(this).val( new_value ).change();
+					$( this ).val( new_value ).change();
 				});
 			break;
 			case 'variable_regular_price' :
@@ -227,51 +260,51 @@ jQuery( function($){
 			case 'variable_height' :
 			case 'variable_download_limit' :
 			case 'variable_download_expiry' :
-				var value = prompt( woocommerce_admin_meta_boxes_variations.i18n_enter_a_value );
+				value = window.prompt( woocommerce_admin_meta_boxes_variations.i18n_enter_a_value );
 
-				jQuery( ':input[name^="' + bulk_edit + '["]').val( value ).change();
+				$( ':input[name^="' + bulk_edit + '["]').val( value ).change();
 			break;
 			default:
-				jQuery('select#field_to_edit').trigger(bulk_edit);
+				$( 'select#field_to_edit' ).trigger( bulk_edit );
 			break;
 
 		}
 	});
 
-	jQuery('#variable_product_options').on('change', 'input.variable_is_downloadable', function(){
+	$( '#variable_product_options' ).on( 'change', 'input.variable_is_downloadable', function () {
 
-		jQuery(this).closest('.woocommerce_variation').find('.show_if_variation_downloadable').hide();
+		$( this ).closest( '.woocommerce_variation' ).find( '.show_if_variation_downloadable' ).hide();
 
-		if (jQuery(this).is(':checked')) {
-			jQuery(this).closest('.woocommerce_variation').find('.show_if_variation_downloadable').show();
+		if ( $( this ).is( ':checked' ) ) {
+			$( this ).closest( '.woocommerce_variation' ).find( '.show_if_variation_downloadable' ).show();
 		}
 
 	});
 
-	jQuery('#variable_product_options').on('change', 'input.variable_is_virtual', function(){
+	$( '#variable_product_options' ).on( 'change', 'input.variable_is_virtual', function () {
 
-		jQuery(this).closest('.woocommerce_variation').find('.hide_if_variation_virtual').show();
+		$( this ).closest( '.woocommerce_variation' ).find( '.hide_if_variation_virtual' ).show();
 
-		if (jQuery(this).is(':checked')) {
-			jQuery(this).closest('.woocommerce_variation').find('.hide_if_variation_virtual').hide();
+		if ( $( this ).is( ':checked' ) ) {
+			$( this ).closest( '.woocommerce_variation' ).find( '.hide_if_variation_virtual' ).hide();
 		}
 
 	});
 
-	jQuery('input.variable_is_downloadable, input.variable_is_virtual').change();
+	$( 'input.variable_is_downloadable, input.variable_is_virtual' ).change();
 
 	// Ordering
-	$('#variable_product_options').on( 'woocommerce_variations_added', function() {
-		$('.woocommerce_variations').sortable( variation_sortable_options );
+	$( '#variable_product_options' ).on( 'woocommerce_variations_added', function () {
+		$( '.woocommerce_variations' ).sortable( variation_sortable_options );
 	} );
 
-	$('.woocommerce_variations').sortable( variation_sortable_options );
+	$( '.woocommerce_variations' ).sortable( variation_sortable_options );
 
 	function variation_row_indexes() {
-		$('.woocommerce_variations .woocommerce_variation').each(function(index, el){
-			$('.variation_menu_order', el).val( parseInt( $(el).index('.woocommerce_variations .woocommerce_variation') ) );
+		$( '.woocommerce_variations .woocommerce_variation' ).each( function ( index, el ) {
+			$( '.variation_menu_order', el ).val( parseInt( $( el ).index( '.woocommerce_variations .woocommerce_variation' ), 10 ) );
 		});
-	};
+	}
 
 	// Uploader
 	var variable_image_frame;
@@ -279,17 +312,17 @@ jQuery( function($){
 	var setting_variation_image;
 	var wp_media_post_id = wp.media.model.settings.post.id;
 
-	jQuery('#variable_product_options').on('click', '.upload_image_button', function( event ) {
+	$( '#variable_product_options' ).on( 'click', '.upload_image_button', function ( event ) {
 
-		var $button                = jQuery( this );
-		var post_id                = $button.attr('rel');
-		var $parent                = $button.closest('.upload_image');
+		var $button                = $( this );
+		var post_id                = $button.attr( 'rel' );
+		var $parent                = $button.closest( '.upload_image' );
 		setting_variation_image    = $parent;
 		setting_variation_image_id = post_id;
 
 		event.preventDefault();
 
-		if ( $button.is('.remove') ) {
+		if ( $button.is( '.remove' ) ) {
 
 			setting_variation_image.find( '.upload_image_id' ).val( '' );
 			setting_variation_image.find( 'img' ).attr( 'src', woocommerce_admin_meta_boxes_variations.woocommerce_placeholder_img_src );
@@ -322,9 +355,9 @@ jQuery( function($){
 			});
 
 			// When an image is selected, run a callback.
-			variable_image_frame.on( 'select', function() {
+			variable_image_frame.on( 'select', function () {
 
-				attachment = variable_image_frame.state().get('selection').first().toJSON();
+				var attachment = variable_image_frame.state().get( 'selection' ).first().toJSON();
 
 				setting_variation_image.find( '.upload_image_id' ).val( attachment.id );
 				setting_variation_image.find( '.upload_image_button' ).addClass( 'remove' );
@@ -339,8 +372,8 @@ jQuery( function($){
 	});
 
 	// Restore ID
-	jQuery('a.add_media').on('click', function() {
+	$( 'a.add_media' ).on(' click', function () {
 		wp.media.model.settings.post.id = wp_media_post_id;
-	} );
+	});
 
 });