Example 2 - Web Console

The console is something really usefull when we are working with javascript!
Check in the console if something is wrong with the js on this page.

Did you see the error?
ReferenceError: example is not defined

We can interact with the console, to see what happens, try entering the following snippets of code into the console one by one (and then pressing Enter):

alert('hello!');

document.querySelector('html').style.backgroundColor = 'purple';

var myImage = document.createElement('img');
myImage.setAttribute('src','https://campus.mozilla.community/static/img/clubs-home.svg');
document.querySelector('body').appendChild(myImage);

You can learn more about the Console in this MDN article.