How to call angular $filter function in webworker function

[KinkiWu]

Hi, If I have write a angulrjs $filter function, which need a long time to search I put the function ex: doFilter to webworker. It'll show $filter is not defined. How can I call angularjs $filter funciton in a webworker? Thanks for your help. ex: doFilter() { $filter("searchdata")(self.data,self.searchtext)}