Frontend Web Development Bootcamp - Build a Twitter Clone - Select and manipulate the elements - Part 2

This video tutorial covers DOM methods for selecting HTML elements, focusing on querySelector and querySelectorAll. It explains how querySelector returns the first matching element and querySelectorAll returns all matching elements as a NodeList. The tutorial also discusses the differences between NodeLists and arrays, and provides practical examples of using these methods to select elements by ID, class, and tag name. The video concludes with a brief mention of other less common DOM methods and encourages further learning through a JavaScript bootcamp.

What does the querySelector method return when it finds a matching element?

What happens if querySelector cannot find a relevant element?

Explain how to select an element by its ID using querySelector.

What is the significance of the '#' and '.' in CSS selectors?

How does querySelector differ from querySelectorAll?

Describe how to select multiple elements using querySelectorAll.

What is a NodeList and how does it differ from an array?