To identify the elements

Question

to identify elements there are many attribute for this purpose : name, class, id..so how we determine the appropriate, maybe as i know id and class are just for styling..isn't it ?

Answer 1

id: unique identifier (one element must has one only id) for unique element (you cannot set same id to different elements)

class: non-unique identifier (you can set more class to same element) for not-unique element (you can set same class to different elements)