Object.getprototypeof function (JavaScript)

Returns the prototype of the object.

Grammar

Object.getprototypeof (object)

Parameters

Object

Necessary. the object that references the prototype.

return value

The prototype of the object parameter. prototypes are also objects.

Abnormal

An TypeError exception is thrown if the object parameter is not an objects.

function Pasta (grain, width) { This. Grain =Grain;  This. width =width;}varSpaghetti =NewPasta ("Wheat",0.2);varProto =object.getprototypeof (spaghetti);p roto.foodgroup="Carbohydrates"; Console.log (Spaghetti.foodgroup+" "); Carbohydratesvarresult = (Proto = = =pasta.prototype); Console.log (Result+" "); Truevarresult =proto.isprototypeof (spaghetti); Console.log (result);//true

The following example uses the Object.getprototypeof function to verify the data type.

var reg =/a/;var result = (object.getprototypeof (reg) = = = Regexp.prototype);d ocument.write (Result + ""); Truevar err = new Error ("An error"), var result = (object.getprototypeof (err) = = = = Error.prototype);d ocument.write ( result);  True

Object.getprototypeof function (JavaScript)