JavaScript Symbols

JavaScript Symbols are a unique data type that was introduced in ECMAScript 6. They are immutable and unique, meaning that each symbol instance is unique and cannot be changed. Symbols are often used as keys in objects, as they provide a way to create private properties and methods.

Symbols are created using the Symbol() function, which returns a new symbol instance. Symbols can also be given a description, which can be useful for debugging purposes.

One of the main benefits of using symbols is that they help prevent naming collisions in code. Since each symbol instance is unique, there is no risk of accidentally overwriting an existing property or method.

Overall, JavaScript Symbols are a powerful tool for developers who want to create more robust and secure code. They provide a way to create private properties and methods, prevent naming collisions, and ensure that each instance is unique and immutable.