Difference between id and class in html, does it affect the attributes?

Question

html css js

Answer 1

In short:

ID is used for a single element,
Class is used for multiple element.

Generally... they are used for CSS and JS.

Answer 2

Another difference -well not difference but a consequence- is that getElementById can only get one element wereas getElementByClassName can get as many as you have.

Answer 3

`id` can be used for once in a webpage, while `class` can be used in many places in same webpage.

These are used for CSS

Answer 4

ID is used for single elements inn case u want to something only for that div and
Class is used for multiple elements, I mean many divs.