33 JavaScript Concepts Every Developer Should Know - Part 5 == vs === vs typeof

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How much of JavaScript do you really think you know? You probably know how to write functions, understand simple algorithms, and can even write a class. But do you know what a typed array is?

You don't need to know all of these concepts right now, but you will eventually need them later in your career. That’s why I recommend bookmarking this list, because chances are, you’ll encounter one of these topics, and then you’re gonna want a tutorial to fully understand it.

It’s important to note that this list was inspired from the following repository: https://github.com/leonardomso/33-js-concepts

1. Call Stack

Visit the previous part 33 JavaScript Concepts Every Developer Should Know - Part 1 Call Stack.

2. Primitive Types

Visit the previous part 33 JavaScript Concepts Every Developer Should Know - Part 2 Primitive Types.

3. Value Types and Reference Types

Visit the previous part 33 JavaScript Concepts Every Developer Should Know - Part 3 Value Types and Reference Types

4. Implicit, Explicit, Nominal, Structuring and Duck Typing

Visit the previous part 33 JavaScript Concepts Every Developer Should Know - Part 4 Implicit, Explicit, Nominal, Structuring and Duck Typing .

5. == vs === vs typeof

JavaScript has two visually similar, yet very different, ways to test equality. You can test equality with == or ===. —Source

Tutorials

• 📜 JavaScript Double Equals vs. Triple Equals — Brandon Morelli

• 📜 Should I use === or == equality comparison operator in JavaScript? — Panu Pitkamaki

• 📜 == vs === JavaScript: Double Equals and Coercion — AJ Meyghani

6. Function Scope, Block Scope and Lexical Scope

Visit the next part 33 JavaScript Concepts Every Developer Should Know - Part 6 Function Scope, Block Scope and Lexical Scope .