Modern JavaScript from the Beginning - Second Edition - DOM Selectors - Multiple Elements

The video tutorial covers various methods for selecting and manipulating HTML elements using JavaScript. It explains the use of querySelector and querySelectorAll for selecting single and multiple elements, respectively. The tutorial also discusses the differences between NodeList and HTMLCollection, and how to manipulate elements using loops. Additionally, it touches on older methods like getElementsByClassName and getElementsByTagName, highlighting their limitations compared to modern techniques.

Which method is most commonly used to select multiple elements in modern JavaScript?

• getElementsByTagName

• getElementById

• querySelectorAll

• getElementsByClassName

What is a NodeList in JavaScript?

• A method to select elements by class name

• A type of array

• An array-like structure that can use high order array methods

• A collection of HTML elements

How can you change the style of all elements in a NodeList?

• Using a forEach loop

• Directly setting the style property on the NodeList

• Using a while loop

• By converting it to an HTMLCollection

What is a key difference between NodeList and HTMLCollection?

• NodeList is not iterable

• HTMLCollection can use high order array methods

• NodeList can use high order array methods

• HTMLCollection is a type of NodeList

Which method would you use to select elements by their class name?

• querySelectorAll

• getElementsByClassName

• getElementsByTagName

• querySelector

How can you convert an HTMLCollection to an array?

• Using a for loop

• Using Array.from

• Using Array.prototype.slice

• Using JSON.stringify

What happens if you try to use forEach directly on an HTMLCollection?

• It will work as expected

• It will return undefined

• It will throw an error

• It will convert to a NodeList