12.4Use a browser's developer tools to view the DOM tree of the document inFig. 12.4(Links to an external site.)Links to an external site.. Look at the document tree of your favorite website. Explore the information these tools give you in the right panel(s) about an element when you click it.

Please use the Chrome browser:

Start with the documentation for Chrome Developer Tools:https://developer.chrome.com/devtools/index(Links to an external site.)Links to an external site.

CodeSchool has a free course on Chrome DevTools athttps://www.codeschool.com/courses/discover-devtools(Links to an external site.)Links to an external site.

Write a paragraph or two about your experience using the developer tool.

12.5Write a script that contains a button and a counter in a div. The button's event handler should increment the counter each time it's clicked.