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The proxy's handler object is a placeholder object which contains traps for proxies.

Methods

All traps are optional. If a trap has not been defined, the default behavior is to forward the operation to the target.

handler.getPrototypeOf()
A trap for Object.getPrototypeOf.
handler.setPrototypeOf()
A trap for Object.setPrototypeOf.
handler.isExtensible()
A trap for Object.isExtensible.
handler.preventExtensions()
A trap for Object.preventExtensions.
handler.getOwnPropertyDescriptor()
A trap for Object.getOwnPropertyDescriptor.
handler.defineProperty()
A trap for Object.defineProperty.
handler.has()
A trap for the in operator.
handler.get()
A trap for getting property values.
handler.set()
A trap for setting property values.
handler.deleteProperty()
A trap for the delete operator.
handler.ownKeys()
A trap for Object.getOwnPropertyNames and Object.getOwnPropertySymbols.
handler.apply()
A trap for a function call.
handler.construct()
A trap for the new operator.

Some non-standard traps are obsolete and have been removed.

Specifications

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
Определение 'Proxy Object Internal Methods and Internal Slots' в этой спецификации.
Стандарт Initial definition.
ECMAScript Latest Draft (ECMA-262)
Определение 'Proxy Object Internal Methods and Internal Slots' в этой спецификации.
Живой стандарт The enumerate handler has been removed.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 49 [1] 18 (18) 12 36 10
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support Нет Нет 18 (18) Нет Нет Нет

[1] Enabled by default.

See also

Метки документа и участники

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