diff --git a/js/customize-nav-menus-posts-extensions.js b/js/customize-nav-menus-posts-extensions.js
new file mode 100644
index 0000000..b9fb1e5
--- /dev/null
+++ b/js/customize-nav-menus-posts-extensions.js
@@ -0,0 +1,41 @@
+(function( api, $ ) {
+	'use strict';
+
+	if ( api.Menus.insertAutoDraftPost ) {
+
+		/**
+		 * Insert a new `auto-draft` post.
+		 *
+		 * @param {object} params - Parameters for the draft post to create.
+		 * @param {string} params.post_type - Post type to add.
+		 * @param {string} params.post_title - Post title to use.
+		 * @return {jQuery.promise} Promise resolved with the added post.
+		 */
+		api.Menus.insertAutoDraftPost = function insertAutoDraftPost( params ) {
+
+			var insertPromise, deferred = $.Deferred();
+
+			insertPromise = api.Posts.insertAutoDraftPost( params.post_type );
+
+			insertPromise.done( function insertAutoDraftPostDone( data ) {
+				var postData;
+
+				postData = _.clone( data.setting.get() );
+				postData.post_title = params.post_title;
+				postData.post_status = 'publish';
+				data.setting.set( postData );
+
+				deferred.resolve( {
+					post_id: data.postId,
+					url: api.Posts.getPostUrl( { post_id: data.postId, post_type: params.post_type } )
+				} );
+			} );
+			insertPromise.fail( function insertAutoDraftPostFail( failure ) {
+				deferred.reject( failure );
+			} );
+
+			return deferred.promise();
+		};
+	}
+
+})( wp.customize, jQuery );
diff --git a/js/customize-posts.js b/js/customize-posts.js
index f2775da..31dff0a 100644
--- a/js/customize-posts.js
+++ b/js/customize-posts.js
@@ -101,31 +101,47 @@
 	};
 
 	/**
-	 * Get the post preview URL.
+	 * Get post URL.
 	 *
-	 * @param {object} params - Parameters to configure the preview URL.
-	 * @param {number} params.post_id - Post ID to preview.
-	 * @param {string} [params.post_type] - Post type to preview.
+	 * @param {object} params - Query vars.
+	 * @param {number} params.post_id - Post ID.
+	 * @param {string} [params.post_type] - Post type.
+	 * @param {boolean} [params.preview] - .
 	 * @return {string} Preview URL.
 	 */
-	component.getPreviewUrl = function( params ) {
-		var url = api.settings.url.home, args = {};
+	component.getPostUrl = function getPostUrl( params ) {
+		var queryVars, postId;
+
+		queryVars = _.clone( params );
+		postId = parseInt( queryVars.post_id, 10 );
 
-		if ( ! params || ! params.post_id ) {
-			throw new Error( 'Missing params' );
+		if ( ! postId ) {
+			throw new Error( 'Missing post_id param.' );
 		}
+		delete queryVars.post_id;
 
-		args.preview = true;
-		if ( 'page' === params.post_type ) {
-			args.page_id = params.post_id;
+		if ( queryVars.post_type && 'page' === queryVars.post_type ) {
+			queryVars.page_id = postId;
 		} else {
-			args.p = params.post_id;
-			if ( params.post_type && 'post' !== params.post_type ) {
-				args.post_type = params.post_type;
-			}
+			queryVars.p = postId;
+		}
+		if ( 'post' === params.post_type || 'page' === params.post_type ) {
+			delete queryVars.post_type;
 		}
 
-		return url + '?' + $.param( args );
+		return api.settings.url.home + '?' + $.param( queryVars );
+	};
+
+	/**
+	 * Get the post preview URL.
+	 *
+	 * @param {object} params - Parameters to configure the preview URL.
+	 * @param {number} params.post_id - Post ID to preview.
+	 * @param {string} [params.post_type] - Post type to preview.
+	 * @return {string} Preview URL.
+	 */
+	component.getPreviewUrl = function getPreviewUrl( params ) {
+		return component.getPostUrl( _.extend( {}, params, { preview: true } ) );
 	};
 
 	/**
diff --git a/php/class-customize-posts-plugin.php b/php/class-customize-posts-plugin.php
index 71ce606..22c8649 100644
--- a/php/class-customize-posts-plugin.php
+++ b/php/class-customize-posts-plugin.php
@@ -305,6 +305,12 @@ public function register_scripts( WP_Scripts $wp_scripts ) {
 		$in_footer = 1;
 		$wp_scripts->add( $handle, $src, $deps, $this->version, $in_footer );
 
+		$handle = 'customize-nav-menus-posts-extensions';
+		$src = plugins_url( 'js/customize-nav-menus-posts-extensions' . $suffix, dirname( __FILE__ ) );
+		$deps = array( 'customize-posts', 'customize-nav-menus' );
+		$in_footer = 1;
+		$wp_scripts->add( $handle, $src, $deps, $this->version, $in_footer );
+
 		// This can be incorporated into customize-preview.js during 4.7.
 		$handle = 'customize-preview-setting-validities';
 		$src = plugins_url( 'js/customize-preview-setting-validities' . $suffix, dirname( __FILE__ ) );
diff --git a/php/class-wp-customize-posts.php b/php/class-wp-customize-posts.php
index 26460e7..4c28951 100644
--- a/php/class-wp-customize-posts.php
+++ b/php/class-wp-customize-posts.php
@@ -656,6 +656,11 @@ public function filter_customize_save_response_to_export_saved_values( $response
 	public function enqueue_scripts() {
 		wp_enqueue_script( 'customize-posts' );
 		wp_enqueue_style( 'customize-posts' );
+
+		if ( isset( $this->manager->nav_menus ) ) {
+			wp_enqueue_script( 'customize-nav-menus-posts-extensions' );
+		}
+
 		$this->enqueue_select2_locale_script();
 
 		$post_types = array();