Google V8 JavaScript Engine - How to set a value to null?

Question

Using the V8 engine, how do I set a value to null? Basically I want to return a variable from a C++ addon to JavaScript, and the variable needs to be set to null under certain conditions.

Answer 1

You can explicitly return null via v8::Null:

return scope.Close( Null() );

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Also, it turns out that if a Value variable is declared, it is automatically assigned to undefined. For example, the following returns undefined back to JavaScript:

 HandleScope scope;
 Local<Value> result;
 ...

 return scope.Close(result);