Exploring the Power of Symbols in JavaScript

Introduction

In this lab, we will explore the concept of symbols in JavaScript. Symbols are a new primitive type introduced in ECMAScript 6 that represent unique identifiers. We will learn how to create symbols, use them as property keys in objects, and check if a given value is a symbol.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL javascript(("`JavaScript`")) -.-> javascript/BasicConceptsGroup(["`Basic Concepts`"]) javascript/BasicConceptsGroup -.-> javascript/variables("`Variables`") javascript/BasicConceptsGroup -.-> javascript/data_types("`Data Types`") javascript/BasicConceptsGroup -.-> javascript/arith_ops("`Arithmetic Operators`") javascript/BasicConceptsGroup -.-> javascript/comp_ops("`Comparison Operators`") subgraph Lab Skills javascript/variables -.-> lab-28445{{"`Value Is Symbol`"}} javascript/data_types -.-> lab-28445{{"`Value Is Symbol`"}} javascript/arith_ops -.-> lab-28445{{"`Value Is Symbol`"}} javascript/comp_ops -.-> lab-28445{{"`Value Is Symbol`"}} end

Checking if a Value is a Symbol in JavaScript

To check if a value is a symbol primitive in JavaScript, you can use the typeof operator. Here's an example code snippet that you can use:

const isSymbol = (val) => typeof val === "symbol";

You can call the isSymbol function and pass a symbol as an argument to check if it returns true. Here's an example:

isSymbol(Symbol("x")); // true

Summary

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Value Is Symbol

Introduction

Skills Graph

Checking if a Value is a Symbol in JavaScript

Summary

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