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object.unwatch

Deprecation warning: Do not use unwatch() and watch()! These two methods were implemented only in Firefox prior to version 58, they're deprecated and removed in Firefox 58+. In addition, using watchpoints has a serious negative impact on performance, which is especially true when used on global objects, such as window. You can usually use setters and getters or proxies instead.

The unwatch() method removes a watchpoint set with the watch() method.

Syntax

obj.unwatch(prop)

Parameters

prop: The name of a property of the object to stop watching.

Return value

undefined.

Description

The JavaScript debugger has functionality similar to that provided by this method, as well as other debugging options. For information on the debugger, see Venkman.

By default, this method is inherited by every object descended from Object.

Note: The reason for unwatch() to take the property name prop as its only parameter is due to the "single handler allowing" behavior of the watch() method.

Examples

See watch().

Specifications

Not part of any specifications. Implemented in JavaScript 1.2.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	No	No	1 — 58	No	No	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	No	No	No	4 — 58	No	No	No

	Server
	Node.js
Basic support	No

Compatibility notes

Calling unwatch() on the Document object throws a TypeError since Firefox 23 (bug 903332). This regression has been fixed with Firefox 27.