Javascript Regex format

Question

I want to check if the input matches this format:

format: "dd/MM/yyyy"

Of course they would have to me numbers. What is the regex expression, and/or jquery/javascript function that i'd use to make sure this input matches this?

Do you want to ensure it's in that format and/or a valid date? — Jason McCreary
– Jason McCreary, Commented Jan 18, 2012 at 20:34

morja · Accepted Answer · 2012-01-18 20:34:33Z

1

Try this:

var matches = str.search(/^\d{2}\/\d{2}\/\d{4}$/) > -1;

answered Jan 18, 2012 at 20:34

morja

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Comments

Blazemonger · Accepted Answer · 2012-01-18 20:34:19Z

1

This should do it:

/^[0123]?\d\/[01]?\d\/\d{2,}$/

Remember that only certain numbers are valid months and days.

Other approaches can be found at the Regular Expression Library.

answered Jan 18, 2012 at 20:34

Blazemonger

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Comments

Anthony Grist · Accepted Answer · 2012-01-18 20:34:44Z

0

If you just wanted to check the format, and not if it's actually a valid date, the following should work:

/\d{2}\/\d{2}\/\d{4}/

answered Jan 18, 2012 at 20:34

Anthony Grist

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