日期不会在jsFiddle中发出警报

Question

var dateNum = Number('/Date(1306348200000)/'.replace(/[^0-9]/g,''));
var formattedDate = new Date(parseInt(dateNum.substr(6)));   
alert(formattedDate);

What's wrong with this code? Why does it not execute and give me the desired result...

Answer 1

Try this.

var formattedDate = new Date(parseInt(dateNum.toString().substr(6)));

Felix's comment is the answer :)

Answer 2

I've no idea why you're doing it in a complicated way - / / is for regular expressions, not for dates. Then you also have this notation inside a string. I'm not aware of any /Date(...)/ format. What you're doing on the first line is parsing the number out of it, but why not do it yourself?

This works fine:

var formattedDate = new Date(1306348200000);   
alert(formattedDate);

To format it, you would need certain functions to combine the date components as described here:

https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date#Methods_2

Answer 3

Interesting function you have here. I see at least one problem dateNum is not a string.

Might be a good idea to submit what you expect to get from your code.