The Boolean object is used to convert a non-Boolean value to a Boolean value (true or false).
The Boolean object represents two values: "true" or "false".
The following code creates a Boolean object called myBoolean:
var myBoolean=new Boolean(); |
Note: If the Boolean object has no initial value or if it is 0, -0, null, "", false, undefined, or NaN, the object is set to false. Otherwise it is true (even with the string "false")!
All the following lines of code create Boolean objects with an initial value of false:
var myBoolean=new Boolean(); var myBoolean=new Boolean(0); var myBoolean=new Boolean(null); var myBoolean=new Boolean(""); var myBoolean=new Boolean(false); var myBoolean=new Boolean(NaN); |
And all the following lines of code create Boolean objects with an initial value of true:
var myBoolean=new Boolean(true);
var myBoolean=new Boolean("true");
var myBoolean=new Boolean("false");
var myBoolean=new Boolean("Richard");
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