Vue 中根据当前的日期 显示当前是周几

//dataDate是需要转换成周几的日期
<div>{{getWeek(dataDate)}}</div>

getWeek(dateStr){
	let date = '' //周几
	let weeks = {
	  "0":'星期日',
	  "1":'星期一',
	  "2":'星期二',
	  "3":'星期三',
	  "4":'星期四',
	  "5":'星期五',
	  "6":'星期六',
	}
	let date = new Date(dateStr);
	let weekIndex = date.getDay();
	date = weeks[weekIndex];
	return date 
}