javascript - withFormat closure is not sending response based on ACCEPT header -

i'm trying withformat closure in grails. i've got following in action:

    if (myinstance.save(flush: true)) {             withformat {                 html {redirect(action: "list") }                 js {render "alert('came here')"}             }      } 

as understand withformat closure: if accept header text/javascript render alert , if ['text/html','application/xhtml+xml'] redirect list action. however, in case rendering list action.

i'm using rest console in chrome , here details of request header:

accept: text/javascript content-type: application/json connection: keep-alive origin: chrome-extension: //rest-console-id user-agent: mozilla/5.0 (macintosh; intel mac os x 10_8_2) applewebkit/537.31 (khtml, gecko) chrome/26.0.1410.65 safari/537.31 

and here response headers:

status code: 200 date: fri, 10 may 2013 14:45:18 gmt server: apache-coyote/1.1 transfer-encoding: chunked content-language: en-us content-type: text/html;charset=utf-8 

the response body coming html whereas i'm expecting js

the mime types seem correct in config.groovy

grails.mime.types = [     all:           '*/*',     atom:          'application/atom+xml',     css:           'text/css',     csv:           'text/csv',     form:          'application/x-www-form-urlencoded',     html:          ['text/html','application/xhtml+xml'],     js:            'text/javascript',     json:          ['application/json', 'text/json'],     multipartform: 'multipart/form-data',     rss:           'application/rss+xml',     text:          'text/plain',     xml:           ['text/xml', 'application/xml'] ] 

what doing wrong here??

after testing found out whichever closure comes first taking precedence. if have:

        withformat {             js {render "alert('came here')"}             html {redirect(action: "list") }         } 

then js being rendered if testing application browser...

grails.mime.use.accept.header = true setting required in config.groovy. have set?

refer bottom of withformat page.