What is the difference between reference and primitive data types types in Javascript?

JavaScript: What is the difference between reference and primitive data types types in Javascript?

There are two main types of data types in JS - reference and primitive. Here is a quick overview of the differences

Reference Data Types

Reference data types are accessed by reference - it is a pointer to a location in memory. Their data is stored on the heap. If it is an object, it is a reference type.

Some of the main references types are:

Object literals, Arrays, Functions, etc

Primitive Data Types

This would be the typical normal way of storing data, by value. It is stored on the stack.

There are 6 main primitive types:

String, Number (there is no real distinction between floats, integers in JS. They are all stored as floats.), Null, Boolean, Undefined and Symbols (since ES6)

webdevetc profile pic
webdevetc

I am a 29 year old backend web developer from London, mostly focusing on PHP and Laravel lately. This (webdevetc.com) is my blog where I write about some web development topics (PHP, Laravel, Javascript, and some server stuff). contact me here.



More...


Comments and discussion about What is the difference between reference and primitive data types types in Javascript?

Found this interesting? Maybe you want to read some more in this series?

Or see other topics in the JavaScript language

Or see other languages/frameworks:
PHP Laravel Composer Apache CentOS and Linux Stuff WordPress General Webdev and Programming Stuff JavaScript
Or see random questions

Why should you update APP_URL from from http://localhost?

How to undelete a soft deleted Eloquent row?

How to find the intersection (same values) from two arrays?

How to Force www or non-www in htaccess

How to do comments in Blade files?

How to add the CSRF (Cross-site request forgery) token in Laravel?

What are the main error types in PHP

How do you launch the PHP interactive shell?

How to enable the rewrite engine in .htaccess?

How to block an IP address in .htaccess