Mastodon Direct Follow for 3.5.3

// ==UserScript==
// @name        Mastodon Direct Follow for 3.5.3
// @match       *://*/*
// ==/UserScript==
const domain = "hachyderm.io";
if ([...document.getElementsByTagName("a")].filter(el => el.href.match(/joinmastodon/)).length > 0) {
    // Applies to 3.5.3 domains only for now
    [...document.querySelectorAll("a.button")].filter(el => (el.innerText == "Follow")).forEach(el => {
        const remote_follow_matches = el.href.match(/https?:\/\/.*\/users\/(.*)\/remote_follow/);
        if (remote_follow_matches !== null && remote_follow_matches.length == 2) {
            const searchParams = new URLSearchParams({ uri: remote_follow_matches[0].slice(0, -14) });
            el.href = `https://${domain}/authorize_interaction?${searchParams.toString()}`;
            el.innerText = `Follow on ${domain}`;
        }
    });
}