Boolean.prototype.toString() - JavaScript 编辑

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

Browser compatibility

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See also

• Object.prototype.toString()