JSFiddle - React, Tailwind, and code Playground

HTML

<div id="my_contenteditable" contenteditable>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Dolor veniam asperiores laudantium repudiandae doloremque sed perferendis obcaecati delectus autem perspiciatis aut excepturi et nesciunt error ad incidunt impedit quia dolores rerum animi provident dolore corporis libero sunt enim. Ad magnam omnis quidem qui voluptas ut minima similique obcaecati doloremque atque!
<br><br>
Place your caret here and hit ENTER a few times
</div>

CSS

div {
    background: skyblue;
    padding:10px;
}

JavaScript

$('#my_contenteditable').on('keydown', function(e) {
	if (e.key == 'Enter') {
  	$(this).blur();
    e.preventDefault();
    return;
  }
});