How Implement Regex For A Textfield To Allow One Comma One Space At A Time In Extjs

I am working on a textfield to make it allow only numbers with max one comma and one space(max) at any occurrence. It can accept value like '5,8', '5 ,8' and '5 , 8'. It should not

Solution 1:

This is quite a simple solution.

In order to accept possible characters you can use ?, which signifies exactly 0 or exactly 1 occurrence of the preceding character. For your requirement, the regex pattern:

^\d+\s?,\s?\d+$

Will allow 2 numbers (with multiple digits, if you need it) with a comma between them, with optional spaces.

See the example on regex101

To implement in the line of code you shared:

this.regex = new RegExp('^\\d+\\s?,\\s?\\d+$');