Frontend Interview | Andras Hejj

Things I typically like to ask during a frontend dev interview:

CSS and layout questions

Can you explain CSS specificity?

Which units do you know, and when would you use each one?

Let's talk about height. How would you style a div so it is full-page height?

Talk about internationalization and LTR/RTL. How would you style a paragraph with a 1em margin at the end of text?

Talk about margins. How would you style a footer with predictable spacing?

Can you name different positioning algorithms and how they work?

Explain the logic of an absolutely positioned element. How will it be positioned with inset: 10px?

What is a stacking context? What are different ways to create one?

Setting opacity to a value less than 1
Setting position to fixed or sticky
Applying a mix-blend-mode other than normal
Adding a z-index to a child inside a display: flex or display: grid container
Using transform, filter, clip-path, or perspective
Explicitly creating a context with isolation: isolate

How do you achieve a container that can overflow on the y-axis but not on x-axis?

One practical pattern is to use an outer wrapper to control clipping/rounding and an inner scroller to control the overflow behavior.