I find it very easy to keep track of all language features using cheat sheet.

I have been coding for the last 10 years. I have been through Quick Basic, Visual Basic, C, PHP, Ruby, Javascript and Web UI with CSS, HTML and Bootstrap. Its impossible for anyone to remember all the features and syntax of everything.

Then, I found https://ohmycheatsheet.com . It has everything I need like CSS, HTML, jQUery, Ruby and Javascript cheat sheets.

Some useful links are:-

https://ohmycheatsheet.com/

https://ohmycheatsheet.com/css

https://ohmycheatsheet.com/jquery

https://ohmycheatsheet.com/ruby

https://ohmycheatsheet.com/ruby/Array

https://ohmycheatsheet.com/html

https://ohmycheatsheet.com/fontawesome/

https://ohmycheatsheet.com/material_icons/