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is-symbol

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is-symbol

Determine if a value is an ES6 Symbol or not.


Version published
Weekly downloads
25M
decreased by-18.85%
Maintainers
1
Install size
41.2 kB
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Weekly downloads
 

Package description

What is is-symbol?

The `is-symbol` npm package is designed to provide a simple and efficient way to check if a given value is a Symbol. This can be particularly useful when working with ES6 Symbols, ensuring that operations or functions that require a symbol as an argument are provided with the correct type of value.

What are is-symbol's main functionalities?

Check if a value is a Symbol

This feature allows you to verify whether a given value is a Symbol. It's useful in scenarios where the type of a variable needs to be asserted before performing operations that are specific to Symbols.

const isSymbol = require('is-symbol');

console.log(isSymbol(Symbol('foo'))); // true
console.log(isSymbol('bar')); // false

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Is this an ES6 Symbol value?

Example

var isSymbol = require('is-symbol');
assert(!isSymbol(function () {}));
assert(!isSymbol(null));
assert(!isSymbol(function* () { yield 42; return Infinity; });

assert(isSymbol(Symbol.iterator));
assert(isSymbol(Symbol('foo')));
assert(isSymbol(Symbol.for('foo')));
assert(isSymbol(Object(Symbol('foo'))));

Tests

Simply clone the repo, npm install, and run npm test

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Package last updated on 08 May 2021

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