Reputation: 41939
Looking at the Boolean.constructor
:
var bool = true;
var booleanObj = new Boolean(true);
console.log ('typeof bool', typeof bool); # returns 'boolean'
console.log ('typeof booleanObj', typeof booleanObj); # returns 'object'
The following line returns: function Function() { [native code] }
. How can I see the native code
?
console.log('Boolean.constructor', Boolean.constructor);
Lastly, how can I get
var y = Boolean.constructor(true);
console.log('typeof y', typeof y); # returns function
Then, printing y
gives: y: function anonymous() { true }
. How can I extract true
?
console.log('y:', y);
Upvotes: 0
Views: 37
Reputation: 888303
Boolean
is a function.
Its constructor
property is the constructor for all functions; namely, the Function
function.
The native code is part of the Javascript engine and is typically written in C++.
If you want to, you can explore the source code for V8 or SpiderMonkey.
true
is the body of the function you created by calling the Function
constructor.
Upvotes: 1