A progress bar in percent in HTML & CSS
HTML & CSS interview exercise on Box model & units, difficulty 2 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
The bar is as wide as its container and 12px tall, with rounded ends and a light track. The fill takes its width from the --value custom property on it (60% here) and shares the rounding. Change nothing in the markup.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.