UserScript to redirect medium.com articles to scribe.rip

medium-to-scribe.js

// ==UserScript==
// @name          Medium to Scribe
// @description   Redirects Medium.com articles to scribe.rip
// @match         *://*/*
// @exclude       /^https?://(www\.)?medium\.com/((\?.*)|((m|about|creators|membership)/.*))$/
// @run-at        document-end
// @version       1.2.4
// @updateURL     https://gist.githubusercontent.com/samhenrigold/4a082dde823bc3cb62e43a2fc2b12b8e/raw/medium-to-scribe.js
// ==/UserScript==

/* 
I rewrote this script to be more efficient and less prone to breaking. Here's how it works:
0. Before the script even runs, check to see if the current page is a Medium URL but NOT an article URL. This is to prevent the script from redirecting you from Medium's terms of service or signup pages.
1. We check if the page you're on is a Medium article by checking for the presence of a specific meta tag in the document head.
2. Check if we've already written the datetime to this article's localstorage (we use the key "scribeRedirected").
    a. If scribeRedirected is present, we know we've already redirected this article to scribe.rip and you've gone back to Medium for whatever reason (If scribe broke the article or something).
    b. If it doesn't exist OR if the datetime is older than 30 seconds in the past, we assume you've been sent to this Medium article and want to get redirected to scribe, so we write the current datetime to localStorage and send you on your way.
*/

// Match <meta property="al:android:package" content="com.medium.reader"> in the document head
if (document.querySelector("meta[property='al:android:package']") && document.querySelector("meta[property='al:android:package']").content === "com.medium.reader") {
    // check if localStorage.getItem("scribeRedirected") is empty or if the value is within the last 10 minutes
    if (localStorage.getItem("scribeRedirected") === null || (new Date().getTime() - localStorage.getItem("scribeRedirected")) > 30_000) {
        localStorage.setItem("scribeRedirected", Date.now());
        window.history.pushState({}, "", window.location.href);
        window.location.hostname = "scribe.rip";
        // Make sure the old url is in the history so we can go back to it
    }
}

I think you may need to change from @run-at from document-start to document-end. As of now the script runs before the page even loads, so document.querySelector("meta[property='al:android:package']") will always return null.

good catch, thanks