Value and reference types

Question

I know that there are 6 data types in JavaScript.

What are the \"reference\" types in JavaScript and what are the \"value\" data types in JavaScript?. Could someone list

Answer 1

From the standard#sec-8

The ECMAScript language types are Undefined, Null, Boolean, String, Number, and Object

The only "reference" type is the Object.

Answer 2

undefined, null, number, string, boolean and object

object is a reference type.

Answer 3

undefined, null, number, string, boolean and object of which only object is a "reference" type.

There is no assignment by reference or pass by reference in javascript, whenever you pass/assign a "reference" type, you pass/assign a copy of the reference, you don't create a reference of the reference which would have different implications.

You can use these functions:

function isReferenceType( value ) {
     return Object(value) === value;
}

function isPrimitiveType( value ) {
     return Object(value) !== value;
}