javascript javascript检查时间并显示消息
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/13823856/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
javascript check time and display message
提问by user1895103
How do you retrieve the hours and minutes of Dateobject and then display a message? If the time is between 9pm and 12am I want to display "We are closed", otherwise I want to display "We are open".
如何检索Date对象的小时和分钟，然后显示消息？如果时间在晚上 9 点到中午 12 点之间，我想显示“我们已关闭”，否则我想显示“我们已开放”。
<script language="javascript">
<!--
today = new Date();
document.write('<BR>We are Open');
//-->
</script>
回答by pimvdb
todayis a Date, so you can use its functions. In your case, use today.getHours()and check whether it's >= 12and < 21to show the opened message. The closed message can appear in an else.
today是 a Date，所以你可以使用它的功能。在你的情况下，使用today.getHours()并检查它是否>= 12和< 21以显示打开的邮件。关闭的消息可以出现在else.
Note that this uses the client's time, so if you're using this on a web page worldwide, then you might be opened in Europe but at the same time closed in the US.
请注意，这会使用客户端的时间，因此如果您在全球网页上使用它，那么您可能会在欧洲打开但同时在美国关闭。
回答by Andrew Rhyne
I'm not sure if I got the "time logic" correct (check the if statement), but this should be what you are looking for.
我不确定我的“时间逻辑”是否正确（检查 if 语句），但这应该是您要找的。
var objDate = new Date();
var hours = objDate.getHours();
if(hours >= 12 && hours <= 21){
document.write('We Are Closed');
}
else{
document.write('We are Open');
}
回答by Ruchi
You can get Minutes And Hours From Date Using Following:
您可以使用以下方法获取从日期开始的分钟和小时数：
var d = new Date();
var m = d.getMinutes();
var h = d.getHours();
Compare your var h using following condition and get the desired result:
使用以下条件比较您的 var h 并获得所需的结果：
if(h>= 12 && h<= 21)
回答by Samuele Mattiuzzo
i usually use this kind of solution, which i'm posting just for knowledge (pimvdb's answer is more clear indeed)
我通常使用这种解决方案，我发布只是为了获取知识（pimvdb 的回答确实更清楚）
var d = new Date();
var currtime = d.getHours() * 100 + d.getMinutes();
// now your currtime looks like 530 if it's 5.30am, or 1730 if it's 5.30 pm
// you can just do a simple comparison between ints
if (currtime > 2000 and currtime < 800){
// closed between 20:00 (8 pm) and 8:00 (8 am) as an example
alert("We are closed");
}
you basically convert your time to an integer, making comparison easier (thus not so much readable and mantainable)
您基本上将时间转换为整数，使比较更容易（因此可读性和可维护性不那么强）
