Your own types

An object groups values under names: const s = { name: "Asha", marks: 91 }; then s.name and s.marks.

A class describes that shape once. Its constructor runs when you write new Student("Asha", 91), and this.name is this student's own name.

1class Student {
2  constructor(name, marks) {
3    this.name = name;
4    this.marks = marks;
5  }
6}
7 
8const s = new Student("Asha", 91);
9console.log(s.name, s.marks);