Matching exactly 10 digits in Javascript [duplicate]

Question

I've tried other questions on SO but they don't seem to provide a solution to my problem:

I have the following simplified Validate function

function Validate() {     var pattern = new RegExp("([^\d])\d{10}([^\d])");      if (pattern.test(document.getElementById('PersonIdentifier').value)) {         return true;     }     else {         return false;     } } 

I've tested to see if the value is retrieved properly which it is. But it doesn't match exactly 10 digits. I don't want any more or less. only accept 10 digits otherwise return false.

I can't get it to work. Have tried to tweak the pattern in several ways, but can't get it right. Maybe the problem is elsewhere?

I've had success with the following in C#:

Regex pattern = new Regex(@"(?<!\d)\d{10}(?!\d)") 

Examples of what is acceptable:

0123456789 ,1478589654 ,1425366989

Not acceptable:

a123456789 ,123456789a ,a12345678a

Answer 1

You can try with test() function that returns true/false

var str='0123456789'; console.log(/^\d{10}$/.test(str)); 

OR with String#match() function that returns null if not matched

var str='0123456789'; console.log(str.match(/^\d{10}$/)); 

Note: Just use ^ and $ to match whole string.

Answer 2

You can use this:

var pattern = /^[0-9]{10}$/;