Do you want to check your fundamental knowledge of Front End Developer?

Check if you can deal with selectors! You can do it on this page: https://flukeout.github.io/

In this simple app you can check your knowledge about selectors based on: element #id element in element #id A .classname element.className Put your back into it! tag, tag (list of element) * element * element + element element ~ element element > element :first-child :only-child :last-child :nth-child(A) :nth-last-child(A) :first-of-type :nth-of-type(A) :nth-of-type(An+B) :only-of-type :last-of-type :empty :not(X)

So if you want to learn it just check it out! If you know it you should check it if you dont lie : )