FND.10.01 BeginnerCore — asked often

The DOM: selecting and changing elements

Comes up in: Recruiter screen, UI 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

what the DOM is (tree of nodes)
querySelector(All)
textContent vs innerHTML (and the XSS warning)
classList
attributes
createElement, append, remove

Words you will know

DOMnodeelementXSS

What you will practise

to-do list rendering (worked)

Interview questions this answers

What is the DOM?
What is the difference between textContent and innerHTML? Why can innerHTML be dangerous?