On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 7 on 2010-10-19 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Chrome Android version 18 on 2012-06-27 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Deno version 1.0 on 2020-05-13 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Edge version 12 on 2015-07-29 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Firefox version 25 on 2013-10-29
In Firefox for Android version 25 on 2013-10-29
In Internet Explorer version 10 on 2012-10-26 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Node.js version 0.10.0 on 2013-03-11 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Quest Browser version 5.0 on undefined Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Opera version 11.6 on 2011-12-06 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Opera Android version 12 on 2012-02-25 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Safari version 5.1 on 2011-07-20 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Safari on iOS version 5 on 2011-10-12 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In Samsung Internet version 1.0 on 2013-04-27 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In WebView Android version 4.4 on 2013-12-09 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
In WebView on iOS version 5 on 2011-10-12 Note: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.