新手“初次约会格式”;脚本

Newbie "first date formatting" script

本文关键字：脚本 格式 约会 新手      更新时间：2023-09-26

我昨天开始尝试使用JavaScript。这本来是我的第一个脚本，但是当它作为html文件打开时不能正常工作。我看不出有什么问题，已经看了四遍了，有什么建议吗?

<HTML>
<HEAD>
<TITLE>Displaying the current time and date (formatted version)</TITLE>
<SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript">
<!-- Hide from browser that do not support JavaScript
var today = new Date();
var month = today.getMonth();
var displayMonth="";
switch (month) {
   case 0 :
     displayMonth = "January"
     break
   case 1 :
     displayMonth = "February"
     break
   case 2 :
     displayMonth = "March"
     break
   case 3 :
     displayMonth = "April"
     break
   case 4 :
     displayMonth = "May"
     break 
   case 5 :
     displayMonth = "June" 
     break
   case 6 :
     displayMonth = "July"
     break 
   case 7 :
     displayMonth = "August"
     break
   case 8 :
     displayMonth = "September"
     break
   case 9 :
     displayMonth = "October"
     break 
   Case 10 :
     displayMonth = "November"
     break
   Case 11 : 
     displayMonth = "December"
     break
   default: displayMonth = "INVALID"
}
   var hours = today.getHours();
   var minutes = today.getMinutes();
   var greeting;
   var ampm;
   if (hours <= 11) {
     greeting = "Good morning!";
     ampm="a.m."; 
     if (hours == 0) {
       hours= 12;
     }
  }
     else if (hours > 11 && hours < 18) {
       greeting = "Good afternoon!";
       ampm = "p.m.";
       if (hours > 12 ) {
          hours -= 12;
       }
     }
     else if (hours > 17 && hours < 21) {
       greeting = "Good evening!";
       ampm = "p.m.";
       hours -= 12;
     }
     else if (hours > 20) {
       greeting = "Good Night!";
       ampm = "p.m.";
       hours -= 12;
     }
    if (minutes < 10) {
       minutes = "0" + minutes;
    }
var displayGreeting = displayMonth + " "
       + today.getDate() + ", "
       + today.getYear()
       + " - " + hours + ":" + minutes + " " + ampm
document.writeln(displayGreeting)  
// --> Finish hiding
</SCRIPT>
</HEAD>
<BODY>
<B> HELP <B>
</BODY>
</HTML>

欢迎，我建议不要使用这么长的case声明来获取当前月份，而是使用以下

var monthNames = ["January", "February", "March", "April", "May", "June",
  "July", "August", "September", "October", "November", "December"
];
var month = monthNames[today.getMonth()];

你有两次Case而不是case, javascript是case-sensitive(没有双关语的意思…)

我想你也忘了显示你的问候信息。

一个可以工作的JSfiddle: https://jsfiddle.net/tg6ofrvr/2/

(我只使用jquery来显示消息，因为在jsfiddle中不允许打印文档)

您自己编写的代码，只是稍加修改。:) 

<HTML>
<HEAD>
<TITLE>Displaying the current time and date (formatted version)</TITLE>
<SCRIPT LANGUAGE="JavaScript" TYPE="text/javascript">
   <!-- Hide from browser that do not support JavaScript
   var today = new Date();
   var month = today.getMonth();
   var displayMonth="";
   var months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
   var hours = today.getHours();
   var minutes = today.getMinutes();
   var greeting;
   var ampm;
   if (hours <= 11) {
     greeting = "Good morning!";
     ampm="a.m."; 
     if (hours == 0) {
       hours= 12;
     }
   }
     else if (hours > 11 && hours < 18) {
       greeting = "Good afternoon!";
       ampm = "p.m.";
       if (hours > 12 ) {
          hours -= 12;
       }
     }
     else if (hours > 17 && hours < 21) {
       greeting = "Good evening!";
       ampm = "p.m.";
       hours -= 12;
     }
     else if (hours > 20) {
       greeting = "Good Night!";
       ampm = "p.m.";
       hours -= 12;
     }
    if (minutes < 10) {
       minutes = "0" + minutes;
    }
    var displayGreeting = months[month] + " " + today.getDate() + ", " + today.getFullYear() + " -  " + hours + ":" + minutes + " " + ampm +"<br />"+ greeting;
    document.writeln(displayGreeting)
    // --> Finish hiding
</SCRIPT>
</HEAD>
<BODY>
<!--B> HELP <B-->
</BODY>
</HTML>
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