Devtools Pro: The Basics of Chrome Developer Tools - udemy Course 100% Off

Navigate around in the DevTools and make live changes to HTML / CSS and Javascript...

Use awesome built-in tools like the color-picker and text shadow editor
Write simple JavaScript commands and learn the basics of how to debug your code
Understand how to simulate Mobile Devices
Get info to improve page load times with Audits
Write larger blocks of test code in the Snippets panel

udemy course :https://www.udemy.com/devtools-2017-the-basics-of-chrome-developer-tools/