Javascript to randomize every number in a HTML page

randomize-numbers-html.js

document.querySelectorAll('body *').forEach(function (e) {
    const html = e.innerHTML;

    if (!html || !html.match(/^[0-9\-\.\,\s]+$/)) {
        return;
    }

    const chars = html.split('');

    for (i = 0; i < chars.length; i++) {
        if (chars[i].match(/[0-9]/)) {
            chars[i] = Math.floor(Math.random() * 10);
        }
    }

    e.innerHTML = chars.join('');
});