jsmapping: panic with proper runtime errors
jsmapping: panic with proper runtime errors

gopherjs/gopherjs,jargv/gopherjs,govlas/gopherjs,govlas/gopherjs,bpowers/gopherjs,bpowers/gopherjs,jargv/gopherjs,gopherjs/gopherjs,gopherjs/gopherjs,gopherjs/gopherjs,albrow/gopherjs,gopherjs/gopherjs,govlas/gopherjs,albrow/gopherjs,jargv/gopherjs,bpowers/gopherjs,albrow/gopherjs