我昨天开始尝试使用 JavaScript。这本来是我的第一个脚本，但在作为 html 文件打开时无法正常运行。我看不出有什么问题，已经检查了四次，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>
最佳答案
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()];
关于javascript - 新手 "first date formatting"脚本，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32701830/