__proto__The __proto__ property of objects partially exposes the prototype of an object.javascriptJavaScriptlimitedhttps://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.prototype.__proto__https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/protojavascript.builtins.Object.protohttps://nowyoucanuse.com/features--proto.html