Console message for debug Constants Add Events listeners to DOM Elements functions We are going to display a message when we click a button. We have two elements with Id in the HTML, the button and a div to display a message. In our JavaScript file we grab a reference to elements in the HTML. We add a function to the Click event of the button. Sample: http://javascript.kennyming.com/code/2-buttons-in-javascript/ Code: https://github.com/kennymingt/javascript/tree/master/code/2-buttons-in-javascript