function onEdit(e) {
  var cfg = { // Please set this object.
    A5: {startRow: 6, endRow: 19},
    A19: {startRow: 20, endRow: 23},
  };

  var activeRange = e.range.getA1Notation();
  var ranges = Object.keys(cfg);
  if (cfg[activeRange]) {
    var sheet = e.source.getActiveSheet();
    var values = sheet.getRange(ranges[0] + ":" + ranges[ranges.length - 1]).getValues();
    values.forEach(function(e, i) {
      if (e[0]) {
        sheet.showRows(cfg[ranges[i]].startRow, cfg[ranges[i]].endRow - cfg[ranges[i]].startRow);
      } else {
        sheet.hideRows(cfg[ranges[i]].startRow, cfg[ranges[i]].endRow - cfg[ranges[i]].startRow);
      }
    });
  }
}