The toString()
method returns a string representing the specified Boolean object.
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Syntax
bool.toString()
Return value
A string representing the specified Boolean
object.
Description
The Boolean
object overrides the toString
method of the Object
object; it does not inherit Object.prototype.toString()
. For Boolean objects, the toString
method returns a string representation of the object.
JavaScript calls the toString
method automatically when a Boolean
is to be represented as a text value or when a Boolean
is referred to in a string concatenation.
For Boolean
objects and values, the built-in toString
method returns the string "true
" or "false
" depending on the value of the boolean object.
Examples
Using toString
In the following code, flag.toString()
returns "true
":
var flag = new Boolean(true); var myVar = flag.toString();
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. |
ECMAScript 5.1 (ECMA-262) The definition of 'Boolean.prototype.toString' in that specification. |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Boolean.prototype.toString' in that specification. |
Standard | |
ECMAScript Latest Draft (ECMA-262) The definition of 'Boolean.prototype.toString' in that specification. |
Draft |
Browser compatibility
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
toString | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 3 | Opera Full support Yes | Safari Full support Yes | WebView Android Full support 1 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support 1.0 | nodejs Full support Yes |
Legend
- Full support
- Full support