The static Reflect.deleteProperty() method allows to delete properties. It is like the delete operator as a function.


Reflect.deleteProperty(target, propertyKey)


The target object on which to delete the property.
The name of the property to be deleted.

Return value

A Boolean indicating whether or not the property was successfully deleted.


A TypeError, if target is not an Object.


The Reflect.deleteProperty method allows you to delete a property on an object. It returns a Boolean indicating whether or not the property was successfully deleted. It is almost identical to the non-strict delete operator.


Using Reflect.deleteProperty()

var obj = { x: 1, y: 2 };
Reflect.deleteProperty(obj, "x"); // true
obj; // { y: 2 }

var arr = [1, 2, 3, 4, 5];
Reflect.deleteProperty(arr, "3"); // true
arr; // [1, 2, 3, , 5]

// Returns true if no such property exists
Reflect.deleteProperty({}, "foo"); // true

// Returns false if a property is unconfigurable
Reflect.deleteProperty(Object.freeze({foo: 1}), "foo"); // false


Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Reflect.deleteProperty' in that specification.
Standard Initial definition.
ECMAScript 2017 Draft (ECMA-262)
The definition of 'Reflect.deleteProperty' in that specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 49 42 (42) No support No support No support
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support No support 42.0 (42) No support No support No support

See also


© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.