JSFiddle - React, Tailwind, and code Playground

HTML

<textarea></textarea>

JavaScript

$('textarea').keyup(function(e) {
    if(e.which == 13) {
        var val = $(this).val(),
            newval = val.replace(/\n{3,}/g, '\n');
        if(val != newval) {
            $(this).val(newval);
        }
    }
});