如何检查JavaScript日期是否有效？
要检查JavaScript日期是否有效，可以尝试运行以下代码-
示例
<!DOCTYPE html>
<html>
<body>
<script>
var date1, date2;
date1 = new Date("2018/1/1");
if( ! isNaN ( date1.getMonth() )) {
document.write("Valid date1: "+date1);
}else{
document.write("<br>Invalid date1");
}
date2 = new Date("20181/1");
if( ! isNaN ( date2.getMonth() )) {
document.write("<br> Valid date2: "+date2);
}else{
document.write("<br>Invalid date2");
}
</script>
</body>
</html>输出结果
Valid date1: Mon Jan 01 2018 00:00:00 GMT+0530 (India Standard Time) Valid date2: Mon Jan 01 20181 00:00:00 GMT+0530 (India Standard Time)