routeUrl(filter=undefined) puts ?filter=undefined in the URL

[phillipskevin]

@phillipskevin commented on Mon Aug 06 2018

[phillipskevin]

It seems like this only happens if filter is not used in a registered route rule.

can.route.register("{foo}")
can.stache("{{routeUrl(foo=undefined)}}")(); // -> #!
can.stache("{{routeUrl(bar=undefined)}}")(); // -> #!&bar=undefined

@justinbmeyer can you confirm you were seeing something different? Or point me to the code where I can reproduce the issue.

[phillipskevin]

2.3 (JSBin) results:

can.route.register("{foo}")
can.stache("{{routeUrl(foo=undefined)}}")(); // -> #!
can.stache("{{routeUrl(bar=undefined)}}")(); // -> #!&bar=

3.0 (JSBin) results:

can.route.register("{foo}")
can.stache("{{routeUrl(foo=undefined)}}")(); // -> #!
can.stache("{{routeUrl(bar=undefined)}}")(); // -> #!&bar=undefined

[phillipskevin]

related to canjs/can-route#186.