adding keyboard enter key to regular expression in JavaScript function to validate textarea

Hi experts,

I'm using JavaScript and a regular expression to validate input in a TextArea.

Here is my working fiddle:
https://jsfiddle.net/r2d22k18/jj27pLbm/1/


When a user types in /> inside the text area, they get the message "Sorry that input is invalid"


When a user types in </ inside the text area, they get the message "Sorry that input is invalid"


These two case are correct and validation message should show up. Any other input is valid.

But I noticed when I press the Enter key on my keyboard that is also failing the validation and causing the message "Sorry that input is invalid" to display.


How do I fix my example, so pressing the Enter Key on my board doesn't cause the validation to fail?