$(document).ready() executes JavaScript when DOM is fully loaded. DOMContentLoaded event fires when HTML is parsed and loaded. Readystatechange event triggers when document's readyState reaches "complete"
Preview Alerts allows testing alert appearance before publishing. Alerts editor contains various events including Follows, Subscriptions, and Hype Train. Each event has default variants with specific conditions. Alert conditions determine when alerts appear based on specific criteria
DOM represents web pages as nodes and objects created by browsers. DOM events are signals sent when specific page events occur. Events can be added in HTML or directly through JavaScript
First Modern Olympics held in Athens in 1896 with 14 countries. 1900 Paris Games featured 997 athletes from 24 countries. 1904 St. Louis Games had only 62 athletes from outside North America. 1908 London Games introduced opening ceremony and most organized format
First running of San Francisco's Bay to Breakers footrace. Brooklyn Superbas baseball team opens new stadium. First woman pilot crosses English Channel. Olympic Games officially open in Stockholm. First baseball exhibition game at Fenway Park
DOM represents web document structure as hierarchical tree. Browser Object Model provides JavaScript access to browser-specific tools. Window object serves as global top-level browser object