A UserScript to prompt on publish for the WordPress.com Calypso client

wordpress-calypso-warn-on-publish.js

// ==UserScript==
// @name         WordPress Calypso Warn on Publish
// @version      0.1
// @description  Warn on publish
// @author       Alister Scott
// @match        https://wpcalypso.wordpress.com/*
// @match        http://calypso.localhost:3000/*
// @match        https://wordpress.com/*
// @grant        none
// ==/UserScript==
/* jshint -W097 */
'use strict';

console.log('WordPress Calypso Warn on Publish script loaded!');

document.addEventListener('click', function(event) {
    var classNames = event.target.className;
    if ( ( typeof(classNames) === 'string') && ( ( classNames.indexOf( 'editor-ground-control__publish-button' ) > -1 ) || classNames.indexOf( 'editor-publish-button' ) > -1 ) ) {   
        var response = confirm("You are about to publish your post or page which will immediately send this to all your followers. Are you sure?");
        if (response === false) {
            event.stopPropagation();
            event.preventDefault();
        }
    }
}, true);