jQuery.isFunction: ambiguous criteria

[akihikodaki]

See also jquery/jquery#3600.

The description says:

Determine if the argument passed is a JavaScript function object.

api.jquery.com/entries/jQuery.isFunction.xml

Line 10 in d622e12

<desc>Determine if the argument passed is a JavaScript function object. </desc>

JavaScript function object is ambiguous. There are some candidates:

• ECMAScript Function Objects

ECMAScript function objects encapsulate parameterized ECMAScript code closed over a lexical environment and support the dynamic evaluation of that code.

• Function Objects

The Function constructor is the %Function% intrinsic object and the initial value of the Function property of the global object.

• function

member of the Object type that may be invoked as a subroutine

(ECMAScript 2016 Language Specification)

Neither of them matches the actual implementation; jQuery.isFunction tests @@toStringTag.

[AurelioDeRosa]

@timmywil do you think it's worth clarifying considering that we have deprecated it?

[mgol]

Neither of them matches the actual implementation; jQuery.isFunction tests @@toStringTag.

That's no longer true in the latest jQuery (and, AFAIK, that has never been a purpose).

[AurelioDeRosa]

Thanks for the answer @mgol. Closing the issue.