Ng-pattern for both negative and positive number

Question

I wanted to restrict the text field to either negative or positive numbers. How can I validate this?

If I enter a positive number, there is no need to enter a '+' sign and if I enter a negative number I need to enter a '-' sign first. The text field should not allow letters.

How is it done? Thank you in advance.

Answer 1

You should add an ng-pattern directive on the html element https://docs.angularjs.org/api/ng/directive/ngPattern

and the regex should be:

"/-?[0-9]+/"

<input ng-pattern="/^-?[0-9]+$/" type="text" ng-model="myModel">