Web platform features explorer

Proxy and Reflect

The Proxy and Reflect JavaScript built-ins intercept and define custom behavior for fundamental language operations (such as property lookup, assignment, enumeration, or function invocation).

Status

Baseline Widely Available (since 2019-03-20)

MDN documentation

Specifications

Browser support (view on caniuse.com)

  • Chrome 49 Released on 2016-03-02
  • Chrome Android 49 Released on 2016-03-09
  • Edge 12 Released on 2015-07-29
  • Firefox 18 Released on 2013-01-08
  • Firefox for Android 18 Released on 2013-01-08
  • Safari 10 Released on 2016-09-20
  • Safari on iOS 10 Released on 2016-09-13