JSFiddle - React, Tailwind, and code Playground

HTML

<textarea class="mydesc" style="width: 200px; height: 200px;">
11111111 1
111 111 11
11 11 11 1
</textarea>

JavaScript

$('.mydesc').keyup(function () {
    this.value = this.value
                     .replace(/[\n\r]+/g, "")
                     .replace(/(.{10})/g, "$1\n");
});