JSFiddle - React, Tailwind, and code Playground

HTML

<div contenteditable="true">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>
Type some stuff, hit ENTER a few times, then press the button.
    <br>
</div>
<pre></pre>
<button>Show Source</button>

CSS

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

pre{
    white-space: pre-wrap;
    background: #EEE;
}

JavaScript

$('button').click(function(){
    $('pre').text($('div')[0].outerHTML)
});

$('div[contenteditable]').on('keydown', function(e) {
    var key = e.keyCode,
        el  = $(this)[0];
    // If Enter    
    if (key === 13) {
        e.preventDefault(); // Prevent the <div /> creation.
        $(this).append('<br>'); // Add the <br at the end
        
        // Place selection at the end 
        // http://stackoverflow.com/questions/4233265/contenteditable-set-caret-at-the-end-of-the-text-cross-browser
        if (typeof window.getSelection != "undefined"
            && typeof document.createRange != "undefined") {
            var range = document.createRange();
            range.selectNodeContents(el);
            range.collapse(false);
            var sel = window.getSelection();
            sel.removeAllRanges();
            sel.addRange(range);
        } else if (typeof document.body.createTextRange != "undefined") {
            var textRange = document.body.createTextRange();
            textRange.moveToElementText(el);
            textRange.collapse(false);
            textRange.select();
        }
    }
});