← Stop Letting One Widget Reflow the Whole Page. `contain` Scopes It.Quiz
CSS contain: draw the boundary
Eight questions on what contain actually promises the browser, the keywords that compose it, and the size-containment gotcha that can collapse an element to nothing.
questions8
pass mark70%
resultsat the end
No account needed. Answer all 8 questions, then see your score with every answer explained and a reference to the spec or MDN — pass and you can claim a certificate.