获取当天是星期几（热门前端面试题）

最新推荐文章于 2024-05-06 10:04:46 发布

woshifan1989

最新推荐文章于 2024-05-06 10:04:46 发布

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分类专栏：原生javascript 文章标签：面试 date

本文链接：https://blog.youkuaiyun.com/fanhaiwang520/article/details/8003133

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本文介绍了使用JavaScript获取当前星期的四种不同方法，包括利用charAt()方法、if语句、switch-case语句及数组结合的方式，展示了灵活运用语言特性的技巧。

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

知识点：getDay()方法取得当前星期几；charAt(index)返回索引值为index的字符；

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

3. var week = (new Date).getDay();
var today = "";
switch(week){
case 0:
today = "今天是星期日！";
break;
case 1:
today = "今天是星期一！";
break;
case 2:
today = "今天是星期二！";
break;
case 3:
today = "今天是星期三！";
break;
case 4:
today = "今天是星期四！";
break;
case 5:
today = "今天是星期五！";
break;
case 6:
today = "今天是星期六！";
break;
}