In web browsers, is a window object a native ECMAScript object?

The ECMAScript specification defines "a unique global object that is created before the control enters any execution context . " This global object is a standard built-in ECMAScript object and therefore a native object.

The specification also states:

In addition to the properties defined in this specification, a global object may have additional properties defined by a node. This may include a property whose value is the global object itself; for example, in the Object Model of an HTML document, the property of the windowglobal object is the global object itself.

Thus, in web browsers, the object windowis simply a convenient name for the global ECMAScript object, so the object windowis a native ECMAScript object.

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