Category: JavaScript

Respond to user and browser events (click, input, submit, load).

Attach handlers with addEventListener and remove them when needed.

Understand capture → target → bubble propagation phases.

Handle many child events via one parent listener.

Read inputs, listen to submit, and build FormData.

Update text/markup with textContent, innerHTML, and insertAdjacentHTML.

Change presentation via style and classList.

Build UI nodes with createElement/append and remove them safely.

Walk parents, children, and siblings with DOM navigation APIs.

Find nodes with querySelector, querySelectorAll, getElementById, and more.