The toString()
method returns a string representing the specified Boolean object.
bool.toString()
A string representing the specified Boolean
object.
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.
toString
In the following code, flag.toString()
returns "true
":
var flag = new Boolean(true); var myVar = flag.toString();
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 |
Desktop | ||||||
---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
Basic support | Yes | Yes | 1 | Yes | Yes | Yes |
Mobile | |||||||
---|---|---|---|---|---|---|---|
Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
Basic support | Yes | Yes | Yes | 4 | Yes | Yes | Yes |
Server | |
---|---|
Node.js | |
Basic support | Yes |
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean/toString