Open a Slack permalink automatically; not open in Slack App

_slack_permalink_auto_redirect_README.md

Slack Permalink Auto Redirect

How to install

1. Install one of these extensions you like in order to execute UserScript.
   • Violentmonkey (FLOSS; Chrome/Firefox/Edge)
   • Tampermonkey (Proprietary; Chrome/Firefox/Edge)
   • Greasemonkey (FLOSS; Firefox)
2. Open https://gist.github.com/mohno007/2622041668bbf4785b03a9072e59414a/raw/slack_permalink_auto_redirect.user.js

slack_permalink_auto_redirect.user.js

// ==UserScript==
// @name         Slack Permalink Auto Redirect
// @namespace    mohno007.github.io/slack-auto-redirect
// @version      1.0.2
// @description  Open a Slack permalink automatically; not open in Slack App
// @author       mohno007
// @match        https://*.slack.com/archives/*
// @match        https://*.slack.com/files/*
// @grant        none
// @run-at       document-end
// @updateURL    https://gist.github.com/mohno007/2622041668bbf4785b03a9072e59414a/raw/slack_permalink_auto_redirect.user.js
// @downloadURL  https://gist.github.com/mohno007/2622041668bbf4785b03a9072e59414a/raw/slack_permalink_auto_redirect.user.js
// ==/UserScript==

{
  const MaxTime = 5000;
  const IntervalTime = 500;
  let count = 0;

  const intervalId = setInterval(() => {
    const elem = document.querySelector('.fallback > a') || document.querySelector('a[href^="/messages/"]');
    if ((IntervalTime * count) > MaxTime) {
      clearInterval(intervalId);
    }
    if (elem !== null) {
      clearInterval(intervalId);
      elem.click();
    }
    count++;
  }, IntervalTime);
}