星期几的不同脚本写法(推荐)和JS年月日格式

来源：互联网发布：java注释的作用编辑：程序博客网时间：2024/05/16 14:32

1、使用 if 语句：

var str = "";var week = new Date().getDay();if (week == 0) {    str = "今天是星期日";} else if (week == 1) {    str = "今天是星期一";} else if (week == 2) {    str = "今天是星期二";} else if (week == 3) {    str = "今天是星期三";} else if (week == 4) {    str = "今天是星期四";} else if (week == 5) {    str = "今天是星期五";} else if (week == 6) {    str = "今天是星期六";}

2、使用switch case 语句：

var str1 = "今天是星期";var week = new Date().getDay();switch (week) {    case 0 :        str1 += "日";        break;    case 1 :        str1 += "一";        break;    case 2 :        str1 += "二";        break;    case 3 :        str1 += "三";        break;    case 4 :        str1 += "四";        break;    case 5 :        str1 += "五";        break;    case 6 :        str1 += "六";        break;}alert(str1);

3、神器，一句话解决

var str = "今天是星期" + "日一二三四五六".charAt(new Date().getDay());alert(str);

4、JS年月日(2016-06-12)

var nowDate = new Date();var year = nowDate.getFullYear();var month = nowDate.getMonth() + 1 < 10 ? "0" + (nowDate.getMonth() + 1) : nowDate.getMonth() + 1;var day = nowDate.getDate() < 10 ? "0" + nowDate.getDate() : nowDate.getDate();var dateStr = year + "-" + month + "-" + day;alert(dateStr);

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