Callback Hell vs Promises

• Open callback_hell.js in your editor
• Open index.html in a browser to see the page in action
• Notice how each callback is nested within another callback
• $.get(url) will return a Promise that you can then use .then() on to get the results or to handle the error
• Use the Promise-version of $.get and chain them so as to get rid of the nested callbacks
• Check your results by refreshing index.html in a browser
• Check your browser's console that you have no errors