水無月ばけらのえび日記

var o = function() { return { prop : "私はプロパティです。" } };

var obj = new o();

console.log(obj.prop);

13.2.2 [[Construct]]

When the [[Construct]] property for a Function object F is called, the following steps are taken:

1. Create a new native ECMAScript object.

2. Set the [[Class]] property of Result(1) to "Object".

3. Get the value of the prototype property of the F.

4. If Result(3) is an object, set the [[Prototype]] property of Result(1) to Result(3).

5. If Result(3) is not an object, set the [[Prototype]] property of Result(1) to the original Object prototype object as described in 15.2.3.1.

6. Invoke the [[Call]] property of F, providing Result(1) as the this value and providing the argument list passed into [[Construct]] as the argument values.

7. If Type(Result(6)) is Object then return Result(6).

8. Return Result(1).