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Desaprobado
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Los __lookupGetter__ metodos retornan la funcion  enlazada como un getter para especificar la propiedad.

Syntax

obj.__lookupGetter__(sprop)

Parameters

sprop
A string containing the name of the property whose getter should be returned.

Return value

The function bound as a getter to the specified property.

Description

If a getter has been defined for an object's property, it's not possible to reference the getter function through that property, because that property refers to the return value of that function. __lookupGetter__ can be used to obtain a reference to the getter function.

It is now possible to do this in a standardized way using Object.getOwnPropertyDescriptor() and Object.getPrototypeOf().

Examples

var obj = {
  get foo() {
    return Math.random() > 0.5 ? 'foo' : 'bar';
  }
};


// Non-standard and deprecated way
obj.__lookupGetter__('foo');
// (function() { return Math.random() > 0.5 ? 'foo' : 'bar'; })


// Standard-compliant way
Object.getOwnPropertyDescriptor(obj, "foo").get;
// (function() { return Math.random() > 0.5 ? 'foo' : 'bar'; })

Specifications

Specification Status Comment
ECMAScript Latest Draft (ECMA-262)
La definición de 'Object.prototype.__lookupGetter__()' en esta especificación.
Draft Included in the (normative) annex for additional ECMAScript legacy features for Web browsers (note that the specification codifies what is already in implementations).

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Soporte básico Si Si111 Si Si
FeatureAndroid webviewChrome para AndroidEdge mobileFirefox para AndroidOpera AndroidiOS SafariSamsung Internet
Soporte básico Si Si Si4 Si Si Si

See also

Etiquetas y colaboradores del documento

Colaboradores en esta página: al-shmlan, jerssonjgar
Última actualización por: al-shmlan,