The __defineGetter__() and __defineSetter__() methods of objects bind a function to a property, which is called on setting or reading the property.

Learning resources on MDN

• Object.prototype.__defineGetter__()
• Object.prototype.__defineSetter__()
• Object.prototype.__lookupGetter__()
• Object.prototype.__lookupSetter__()

Browser support

• Chrome 1 Released on 2008-12-11
• Chrome Android 18 Released on 2012-06-27
• Edge 12 Released on 2015-07-29
• Firefox 1 Released on 2004-11-09
• Firefox for Android 4 Released on 2011-03-29
• Safari 3 Released on 2007-10-26
• Safari on iOS 1 Released on 2007-06-29

View web-platform-tests results for this feature - View the feature source file (dist) - Edit the feature - Report an issue about this feature