Mirror of forum.nim-lang.org

4884 :: xmldomparser on frontend - compile to javascript

• domogled (orginal) [2019-05-29T08:30:16+02:00] view original

  Hello,

  why I parse xml (or html) on frontned. If I compile module which import xmldomparser

  
  # main.nim
  
  from xmldomparser import loadXML
  
  ...
  
  Run

  and compile it into javascript

  nim js main.nim

  I get this error

  ~/.nimble/pkgs/xmldomparser-0.1.0/xmldomparser.nim(145, 11) Error: undeclared identifier: 'newStringStream'

  thanks

---

• mratsim (orginal) [2019-05-29T12:01:10+02:00] view original

  What is your nim compiler version ? (nim -v)

---

• miran (orginal) [2019-05-29T15:57:35+02:00] view original

  From streams.nim:

  when not defined(js):
    type
      StringStream* = ref StringStreamObj
        ## A stream that encapsulates a string.
        ##
        ## **Note:** Not available for JS backend.
    
    # (.......)
    
    proc newStringStream*(s: string = ""): owned StringStream =
      ## Creates a new stream from the string `s`.
      ##
      ## **Note:** Not available for JS backend.
  Run

---

• domogled (orginal) [2019-05-29T16:28:46+02:00] view original

  nim -v

  Nim Compiler Version 0.19.9 [Linux: amd64]

  Compiled at 2019-05-18

  Copyright (c) 2006-2019 by Andreas Rumpf

  active boot switches: -d:release

---

• domogled (orginal) [2019-05-29T16:53:45+02:00] view original

  OK, xmldomparser use stream and streams are not available for JS backend.

  htmlparser library too.

  How I can parse xml on frontend in nim with compile js?

  thanks

---

• kidandcat (orginal) [2019-05-29T17:41:30+02:00] view original

  proc newDOMParser(): JsObject {.importcpp:"new DOMParser()", nodecl.}
  
  proc fetchEPG(): void {.async.} =
    var res = await fetchText("/epg.xml")
    var parser = newDOMParser();
    var xmlDoc = parser.parseFromString(res,"text/xml");
    log xmlDoc
    EPG = xmlDoc
  Run

  Then you can do something like:

  EPG.getElementsByTagName("programme")
  Run

---