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Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

Obsolete since Gecko 2 (Firefox 4 / Thunderbird 3.3 / SeaMonkey 2.1)
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

The __count__ property used to store the count of enumerable properties on the object, but it has been removed.

Syntax

obj.__count__

Examples

{ 1: 1 }.__count__              // 1
[].__count__                    // 0
[1].__count__                   // 1
[1, /* hole */, 2, 3].__count__ // 3

Specifications

Not part of any specification.

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
Basic support
DeprecatedNon-standard
Chrome No support NoEdge No support NoFirefox No support NoIE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoEdge Mobile No support NoFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android No support Nonodejs No support No

Legend

No support  
No support
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

See also

दस्तावेज़ टैग और योगदानकर्ता

इस पृष्ठ के लिए योगदानकर्ता: ExE-Boss, fscholz, Mingun
अंतिम अद्यतन: ExE-Boss,