jsのswitch文の使い方を詳しく解説

switch(表达式) {
   case n:
    代码块
    break;
   case n:
    代码块
    break;
   default:
    默认代码块
}

switch (new Date().getDay()) {
  case 0:
    day = "星期天";
    break;
  case 1:
    day = "星期一";
     break;
  case 2:
    day = "星期二";
     break;
  case 3:
    day = "星期三";
     break;
  case 4:
    day = "星期四";
     break;
  case 5:
    day = "星期五";
     break;
  case 6:
    day = "星期六";
}