JS 獲取星期幾的四種寫法(轉)
阿新 • • 發佈:2018-11-20
今天是星期幾的4種JS程式碼寫法
第一種寫法
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"; } name="code" class="javascript"> alert(str);</pre>
第二種寫法
var str = "今天是星期"; var week = new Date().getDay(); switch (week) { case 0 : str += "日"; break; case 1 : str += "一"; break; case 2 : str += "二"; break; case 3 : str += "三"; break; case 4 : str += "四"; break; case 5 : str += "五"; break; case 6 : str += "六"; break; } alert(str);
第三種寫法
var a = new Array("日", "一", "二", "三", "四", "五", "六");
var week = new Date().getDay();
var str = "今天是星期"+ a[week];
alert(str);
第四種寫法
var str = "今天是星期" + "日一二三四五六".charAt(new Date().getDay());alert(str);