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symbol.toString

The toString() method returns a string representing the specified Symbol object.

Syntax

Symbol().toString();

Return value

A string representing the specified Symbol object.

Description

The Symbol object overrides the toString method of the Object object; it does not inherit Object.prototype.toString(). For Symbol objects, the toString method returns a string representation of the object.

No string concatenation

While you can call toString() on Symbols, you can't use string concatenation with them:

Symbol('foo') + 'bar';       // TypeError: Can't convert symbol to string

Examples

Symbol('desc').toString();   // "Symbol(desc)"

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

// global symbols
Symbol.for('foo').toString() // "Symbol(foo)"

Specifications

Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 38 12 36 No 25 9
Feature Android webview Chrome for Android Edge mobile Firefox for Android Opera Android iOS Safari Samsung Internet
Basic support Yes 38 Yes 36 25 9 ?

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toString