WEB.02.01 Mid-level

Node types, traversal and collections

Comes up in: Web fundamentals, Coding

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

Node vs Element
childNodes vs children
live HTMLCollection vs static NodeList from querySelectorAll
TreeWalker
closest, matches, contains

Words you will know

node typelive collectionstatic NodeList

What you will practise

loop-over-live-collection bug

Interview questions this answers

What is the difference between children and childNodes?
What is the difference between a live HTMLCollection and a static NodeList?