js格式化今天周几

返回今天星期几

formatDay(val) {
  switch (val) {
	case 0:
	  return "Sunday";
	case 1:
	  return "Monday";
	case 2:
	  return "Tuesday";
	case 3:
	  return "Wednesday";
	case 4:
	  return "Thursday";
	case 5:
	  return "Friday";
	case 6:
	  return "Saturday";
	default:
	  return "";
  }
},

/** 使用方式 */
let date = new Date().getDay();
formatDay(date);
//