Limited textline break in js

<p id="para1"> Your text </p>

<script>
    var text = document.getElementById('para1').innerText;
    var newText = '';
    var count = 0;
    for (var i = 0; i < text.length; i++) {
        newText += text[i];
        count++;
        if (count == 100) {
            count = 0;
            newText += '<br />';
        }
    }
    document.getElementById('para1').innerHTML = newText;
</script>