timetracker/games/static/js/add_game.js

import { syncSelectInputUntilChanged } from './utils.js'

let syncData = [
  {
    "source": "#id_name",
    "source_value": "value",
    "target": "#id_sort_name",
    "target_value": "value"
  }
]

syncSelectInputUntilChanged(syncData, "form")