export function enhance ( form , { pending , error , result } ) { let current_token ; async function handle_submit ( e ) { const token = ( current_token = { } ) ; e . preventDefault ( ) ; const body = new FormData ( form ) ; if ( pending ) pending ( body , form ) ; try { const res = await fetch ( form . action , { method : form . method , headers : { accept : 'application/json' } , body } ) ; if ( token !== current_token ) return ; if ( res . ok ) { result ( res , form ) ; } else if ( error ) { error ( res , null , form ) ; } else { console . error ( await res . text ( ) ) ; } } catch ( e ) { if ( error ) { error ( null , e , form ) ; } else { throw e ; } } } form . addEventListener ( 'submit' , handle_submit ) ; return { destroy ( ) { form . removeEventListener ( 'submit' , handle_submit ) ; } } ; }