Reflect.deleteProperty() - JavaScript 编辑

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

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Syntax

Reflect.deleteProperty(target, propertyKey)

Parameters

target

The target object on which to delete the property.

propertyKey

The name of the property to be deleted.

Return value

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

Exceptions

A TypeError, if target is not an Object.

Description

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.

Examples

Using Reflect.deleteProperty()

let obj = { x: 1, y: 2 }
Reflect.deleteProperty(obj, 'x')  // true
obj                               // { y: 2 }

let arr = [1, 2, 3, 4, 5]
Reflect.deleteProperty(arr, '3')  // true
arr                               // [1, 2, 3, undefined, 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

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Reflect
• delete operator