WEB.03.01 JuniorCore — asked often

Capture, target and bubble phases

Comes up in: Web fundamentals, JavaScript, Recruiter screen

This concept is being written. It gets the full five steps — explanation, predict, interview angle, practice with tests, and review cards. Here is exactly what it will cover, so you can study it elsewhere in the meantime.

What it covers

the three phases
addEventListener options (capture, once, passive, signal)
stopPropagation vs stopImmediatePropagation vs preventDefault
events that do not bubble (focus/blur vs focusin/focusout)
composedPath

Words you will know

event propagationcapture phasebubble phaseevent target

What you will practise

predict handler order in nested elements

Interview questions this answers

Explain event bubbling and capturing.
What is the difference between stopPropagation and preventDefault?
Which events do not bubble?
How does React handle events under the hood?