javascript try catch 不捕获无效日期
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try catch does not catch invalid date
提问by Billy Moon
I am trying to validate a date input, so if it is correct, I handle one way, and if invalid, I handle another...
我正在尝试验证日期输入，所以如果它是正确的，我会以一种方式处理，如果无效，我会处理另一种......
var date, datestring, e;
datestring = "2012-03-222";
try {
date = new Date(datestring);
/* Ends up logging `Invalid Date`
*/
console.log(date);
} catch (_error) {
e = _error;
/* Should come here and log `Error: Invalid Date` or the likes
*/
console.log("Erorr: " + e);
}
I could just check the returned string, and see if it is Invalid Dateor not, but am both surprised that try/catchdoes not work for this scenario, and concerned that there might be other error messages I do not match.
我可以只检查返回的字符串，看看它是否Invalid Date存在，但我很惊讶这try/catch不适用于这种情况，并且担心可能有其他我不匹配的错误消息。
How should I handle this problem?
我应该如何处理这个问题？
回答by Michael Pratt
Date objects do not throw an error if they are invalid. There is a method described in this related questionthat will determine if a date is valid.
