handler.defineProperty()

The handler.defineProperty() method is a trap for the [[DefineOwnProperty]] object internal method, which is used by operations such as Object.defineProperty().

Return value: The defineProperty() method must return a Boolean indicating whether or not the property has been successfully defined. Other values are coerced to booleans.

Return value: Many operations, including Object.defineProperty() and Object.defineProperties(), throw a TypeError if the [[DefineOwnProperty]] internal method returns false.

Parameters: The following parameters are passed to the defineProperty() method. this is bound to the handler.

Parameters: target The target object. property A string or Symbol representing the property name. descriptor The descriptor for the property being defined or modified.

Syntax example: new Proxy(target, {