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Desaprobado
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Do not use it in old or new projects. Pages or Web apps using it may break at any time.

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

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
Soporte básico
Deprecated
Chrome Soporte completo SiEdge Soporte completo SiFirefox Soporte completo 1IE Soporte completo 11Opera Soporte completo SiSafari Soporte completo SiWebView Android Soporte completo SiChrome Android Soporte completo SiEdge Mobile Soporte completo SiFirefox Android Soporte completo 4Opera Android Soporte completo SiSafari iOS Soporte completo SiSamsung Internet Android Soporte completo Sinodejs Soporte completo Si

Leyenda

Soporte completo  
Soporte completo
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

See also

Etiquetas y colaboradores del documento

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