JavaScript Object -- Boolean

Boolean object

Boolean indicates two values: "true" or "false ".

Syntax for creating a Boolean object:

New Boolean (value); // Constructor

Boolean (value); // Conversion Function

Parameters

The parameter value is the value stored by a Boolean object or converted to a Boolean value.

Return Value

When called as a constructor (with the new operator), Boolean () converts its parameters into a Boolean value and returns a Boolean object containing the value.

When called as a function (without the new operator), Boolean () only converts its parameters into an original Boolean value and returns this value.

Note: If the value parameter is omitted or set to 0,-0, null, "", false, undefined, Or NaN, the object is set to false. Otherwise, set it to true (even if the value parameter is a string "false ").

Boolean Object Attributes

FF: Firefox, IE: Internet Explorer

Attribute
Description
FF
IE
 
Constructor
Returns a reference to the Boolean function that creates this object.
1
4
 
Prototype
Allows you to add attributes and methods to objects.
1
4
 

Boolean object Method

FF: Firefox, IE: Internet Explorer

Method
Description
FF
IE
 
ToSource ()
Returns the source code of the object.
1
-
 
ToString ()
Converts a logical value to a string and returns the result.
1
4
 
ValueOf ()
Returns the original value of a Boolean object.
1
4
 

Boolean Object Description

In JavaScript, a Boolean value is a basic data type. A Boolean object is a Boolean object that packs a Boolean value. A Boolean object is mainly used to convert a Boolean value to a string's toString () method.

When the toString () method is called to convert a Boolean value to a string (usually called implicitly by JavaScript), JavaScript internally converts the Boolean value to a temporary Boolean object, then, call the toString () method of this object.