Caniuse: Add information about JavaScript's "instanceof"

[marcusparsons]

I noticed that caniuse does not have any information about JavaScript's "instanceof" operator that tests whether a variable is an instance of a particular JavaScript type.

I could not find a reliable resource that lists browser compatibility; however, "instanceof" has been a part of JavaScript since ECMAScript Edition 3, according to the official ECMAScript documentation: https://www-archive.mozilla.org/js/language/E262-3.pdf

[HM100]

That’s supported on all known browsers (IE5.6+, Chrome 3+, FX2+, Opera 9+)?

[marcusparsons]

If I'm not mistaken, yes, that is the case.

[Schweinepriester]

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/instanceof#Browser_compatibility

Imho: "Needs search result" & "Fully supported"

[marcusparsons]

Thank you for those labels!

[Fyrd]

Available at https://caniuse.com/#feat=mdn-javascript_operators_instanceof