Regular expression for sequential numbers like 12345 or 456789

Question

I need to prevent entering 5 digit sequential numbers like 12345, 45678 etc. in a text box.

I had tried with the following regular expression, but it is not working

var regex = /^\(?[0-9]{3}(\-|\)) ?[0-9]{3}-[0-9]{4}$/;

Answer 1

It is better to use non regular expression based approach for this type of tasks. You can do this easily using indexOf. Regular expressions for these patterns become really complicated and un-readable.

var pattern = '0123456789012345789' //to match circular sequence as well.
if (pattern.indexOf(input) == -1) 
  console.log('good input')
else
  console.log('bad input')