Null

Question

Why null data type of object in JavaScript?

Answer 1

null is useful to check if an object exists/has been created

consider:

const obj = null

console.log(obj.name); // Error could crash our program

Fix
// if object exists
if (obj != null)
log(obj.name)
// otherwise move on

Shorter
log(obj?.name); // Problem: something will ALWAYS be printed (null or the actual name)