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Symbol.prototype.description

main Documentación oficial Licencia CC-BY-SA-2.5Descargado el 2026-08-02

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The description accessor property of {{jsxref("Symbol")}} values returns a string containing the description of this symbol, or undefined if the symbol has no description.

{{InteractiveExample("JavaScript Demo: Symbol.prototype.description")}}

```js interactive-example console.log(Symbol("desc").description); // Expected output: "desc"

console.log(Symbol.iterator.description); // Expected output: "Symbol.iterator"

console.log(Symbol.for("foo").description); // Expected output: "foo"

console.log(${Symbol("foo").description}bar); // Expected output: "foobar"

## Description

{{jsxref("Symbol")}} objects can be created with an optional description which can be used for debugging but not to access the symbol itself. The `Symbol.prototype.description` property can be used to read that description. It is different to `Symbol.prototype.toString()` as it does not contain the enclosing `"Symbol()"` string. See the examples.

## Examples

### Using description

```js
Symbol("desc").toString(); // "Symbol(desc)"
Symbol("desc").description; // "desc"
Symbol("").description; // ""
Symbol().description; // undefined

// well-known symbols
Symbol.iterator.toString(); // "Symbol(Symbol.iterator)"
Symbol.iterator.description; // "Symbol.iterator"

// global symbols
Symbol.for("foo").toString(); // "Symbol(foo)"
Symbol.for("foo").description; // "foo"

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#