Basic WP plugin, front-end editing with ajax

front-end-title-edit.js

jQuery(document).ready( function($) {

	$('.entry-title a').after( ' <button class="edit-title">EDIT</button>');
	$('.entry-title').on( 'click', '.edit-title', function(ev) {
		ev.preventDefault();
		var postId = $(this).closest('article.post').attr('id').replace('post-','');
			$a = $(this).prev('a'),
			title = $a.text(),
			newTitle = prompt( 'New Title', title );

		if ( '' == newTitle || null == newTitle ) return;

		$.post( fete.ajaxUrl, {
			action: 'fete_edit_title',
			post_id: postId,
			new_title: newTitle,
			nonce: fete.nonce
		}, function( response ) {
			console.log( response );
			if ( ! response.success ) {
				alert( 'Error: '+ response.data );
				return;
			}
			$a.html( response.data );
		}, 'json' );

	} );
});

front-end-title-edit.php

<?php
/**
 * Plugin Name: Front end title editing
 * Description: Tested only with Twenty Fourteen
 * Plugin URI: http://trepmal.com/2014/01/18/stronger-than-dirt-i-mean-ajax/
 */

add_action( 'wp_enqueue_scripts', 'fete_wp_enqueue_scripts' ); //front end
function fete_wp_enqueue_scripts() {

	// don't bother for logged out users
	if ( ! is_user_logged_in() ) return;

	wp_enqueue_script( 'fete-script', plugins_url( 'front-end-title-edit.js', __FILE__ ), array('jquery') );
	wp_localize_script( 'fete-script', 'fete', array(
		'ajaxUrl' => admin_url('admin-ajax.php'),
		'nonce' => wp_create_nonce( 'security' )
	) );

	?><style>
	.edit-title {
		height: 20px;
		padding: 2px 4px;
		font-size: 14px;
		vertical-align: middle;
		font-weight: normal;
	}
	</style><?php
}

add_action('wp_ajax_fete_edit_title', 'fete_edit_title');
function fete_edit_title() {

	// verify intent
	if ( ! check_ajax_referer( 'security', 'nonce', false ) ) {
		wp_send_json_error( 'Failed nonce check' );
	}

	$new_title = $_POST['new_title'];
	$post_id = $_POST['post_id'];

	// verify capabilities
	if ( ! current_user_can( 'edit_post', $post_id ) ) {
		wp_send_json_error( 'Sorry Dave.' );
	}

	$test = wp_update_post( array(
		'ID' => $post_id,
		'post_title' => $new_title
	) );

	// check if we succeeded
	if ( is_wp_error( $test ) ) {
		wp_send_json_error( 'Update failed.' );
	} else {
		wp_send_json_success( get_the_title( $test ) );
	}

}