JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <a href="#" rel="1 3 5 9 21 56 ">Anchor</a>
    <input type="text" />
    <input type="submit" />
</form>

JavaScript

$("input[type='submit']").click(function(){
    var values = $("a").attr('rel');
    var nikita = $("input[type='text']").val();
    
if ( values.match(nikita) ) {
  alert('The id exists');
  return false;
} else {
    alert('OK');
  return true;
}
});