javascript - how to find the set/get functions of a property (Object.defineProperty) -

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suppose property defined follows:

object.defineproperty(window, 'prop', {     set: setval,     get: getval,     configurable: true }) ;

what redefine window.prop, example:

var ref2setval = window.prop.set ; var ref2getval = window.prop.get ;  object.defineproperty(window, 'prop', {     set: function(val){ ref2setval(val*2); },     get: function()   { return 10 + ref2getval(); } }) ;

window.prop.set/get not work, possible ?

object.getownpropertydescriptor standards compliant way:

var desc = object.getownpropertydescriptor(window, "prop");  var ref2setval = desc.set; var ref2getval = desc.get;

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