Ugly js ffi example, the name of the module is important

localStorage.nim

proc setItem (item:cstring,to:cstring){.importc, exportc:"localStorage.$1"}
proc getItem (item:cstring):string{.importc, exportc:"localStorage.$1"}                           
proc log(x:string) = {.emit :"console.log(`x`);"}                                                 

localStorage.setItem("hi","world")               
log localStorage.getItem("hi") #> world