nl_tokens: makeWorker is a little wrapper for generating web workers from strings
pl_tokens: function makeWorker ( script ) { var URL = window . URL || window . webkitURL ; var Blob = <mask> . Blob ; var Worker = window . Worker ; if ( ! URL || ! Blob || ! Worker || ! script ) { return null ; } var blob = new Blob ( [ script ] ) ; var worker = new Worker ( URL . createObjectURL ( blob ) ) ; return worker ; }