Is there any better way to use transliteration function in ACE editor

[PtPrashantTripathi]

I am working on project where i need transliteration support in ace editor

Currently my code look like this

editor.container.addEventListener("keydown", (key) => {
  if (toggleBtn.checked) {
    if (key.code == "Space" || key.code == "Enter") {
      let pos = session.selection.getCursor();
      let text = session.doc.$lines[pos.row]
        .slice(0, pos.column)
        .split(" ")
        .pop();
      let transliteratedStr = transliteratorFuction(text); //this is return Eng to Sanskrit transliteration
      editor.session.replace(
        {
          start: {
            row: pos.row,
            column: pos.column - text.length,
          },
          end: pos,
        },
        transliteratedStr
      );
    }
  }
});

Is there any better way to do it.

Any suggestions.