#2773 - $.fn.is to accept jQuery and node objects

[timmywil]

See new traversing.js tests. It does seem the performance is in line and it is safe to say there is no loss.
Performance tests: http://jsperf.com/jquery-fn-is

http://bugs.jquery.com/ticket/2773

http://bugs.jquery.com/ticket/8609 (both filter and not now return an empty selection on any invalid argument)

[staabm]

on jsperf there is a second revision of this patch (dont know if you merged v1 or v2 of the patch)

in case you merged revision2... v2 runs into problems on FF4 (winxp), see http://jsperf.com/jquery-fn-is/2

TypeError: c.replace is not a function.

message: c.replace is not a function
fileName: http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js
lineNumber: 16
stack: ([object HTMLDivElement],[object Object])@http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js:16 ([object Object],[object Object])@http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js:16 ([object Object])@http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js:16 ()@http://jsperf.com/jquery-fn-is/2:130 ([object NPObject JS wrapper class])@http://jsperf.com/jquery-fn-is/2:0 ([object Object])@http://a.jsperf.com/benchmark-140.js:8 al()@http://a.jsperf.com/benchmark-140.js:8 C(true)@http://a.jsperf.com/benchmark-140.js:8 au()@http://a.jsperf.com/benchmark-140.js:8 (-10)@http://a.jsperf.com/benchmark-140.js:8 

TypeError: c.replace is not a function.

message: c.replace is not a function
fileName: http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js
lineNumber: 16
stack: ([object HTMLDivElement],[object HTMLDivElement])@http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js:16 ([object HTMLDivElement],[object Object])@http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js:16 ([object HTMLDivElement])@http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js:16 ()@http://jsperf.com/jquery-fn-is/2:131 ([object NPObject JS wrapper class])@http://jsperf.com/jquery-fn-is/2:0 ([object Object])@http://a.jsperf.com/benchmark-140.js:8 al()@http://a.jsperf.com/benchmark-140.js:8 C(true)@http://a.jsperf.com/benchmark-140.js:8 au()@http://a.jsperf.com/benchmark-140.js:8 (-10)@http://a.jsperf.com/benchmark-140.js:8 

[timmywil]

That perf is probably stale. If you could reproduce an issue on jsfiddle.net using jquery(edge), please submit to bugs.jquery.com.