JSFiddle - React, Tailwind, and code Playground

HTML

<textarea name="body" rows=10 id="input" class="text">Test
    Test
    This text will flash
    If the user presses enter and the text area is scrolled.
    This will flash if user presses enter
</textarea>

CSS

hjkhjkhdsf

JavaScript

$('#input').on("keypress", function(e) {
    if (e.keyCode == 13) {
      e.preventDefault();
 
      var value = $("#input").val();
      pos = $("#input").prop('selectionStart');
        $("#input").focus();
      $("#input").val(value.substring(0, pos) + "\nHello\n" + value.substring(pos));
      this.setSelectionRange(pos + 7, pos+7);
        
        return false;
    }
  });