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.
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
Congratulations! You have completed the Value Is Symbol lab. You can practice more labs in LabEx to improve your skills.