[patch][cla] on.selector matchesTarget.matches is not a function

[iCanDo]

The line 187 in on.js

matchesTarget = matchesTarget && matchesTarget.matches ? matchesTarget : dojo.query;

sometimes produces error of type "matchesTarget.matches is not a function".

This change fix the error:

matchesTarget = matchesTarget && typeof matchesTarget.matches == "function" ? matchesTarget : dojo.query;

[dylan]

Hmmm, I thought this bug was typically the result of forgetting to require dojo/query as a dependency when doing event delegation, e.g. ​https://www.sitepen.com/blog/2012/10/31/debugging-dojo-common-error-messages/#forgot-dojo-query

Is there another condition where you're actually seeing this issue iDo?

[iCanDo]

Only 0.0005% of the Firefox and Chrome visitors hit the error.

Firefox 21-22: TypeError?: s.matches is not a function

Chrome 27: Uncaught TypeError?: Property 'matches' of object [object global] is not a function

[dylan]

Fixed in ​https://github.com/dojo/dojo/commit/a19a1c7aca0ce5fe473c848210077bbbd3955698 , backported as ​https://github.com/dojo/dojo/commit/71ef096d7f0829dfcaa5a5dfbf3e8f739d9aa478 . Did not cleanly apply prior to 1.10, so I stopped there. If you need it further backported, please create a PR against 1.9.