javascript - 优化嵌套 switch case

Question

由于嵌套 switch case 的可读性不太好，我如何优化我的嵌套 switch case？

switch (code) {
  case 200:
    switch (status) {
      case 'EXISTS':
        $alreadyExistsMessage.show();
        break;
      case 'UPDATED':
        $alreadyExistsMessage.show();
        break;
      case 'ERROR':
        $wrongFormatMessage.show();
        break;
    }
    break;
  case 201:
    redirectOnSuccess(data);
    break;
  default:
    $wrongFormatMessage.show();
    break;
}

Answer 1

我唯一要做的就是将 'UPDATED' 和 'EXISTS' 由于同一个 block 而合并:

switch (code) {
  case 200:
    switch (status) {
      case 'EXISTS':
      case 'UPDATED':
        $alreadyExistsMessage.show();
        break;
      case 'ERROR':
        $wrongFormatMessage.show();
        break;
    }
    break;
  case 201:
    redirectOnSuccess(data);
    break;
  default:
    $wrongFormatMessage.show();
    break;
}