basecamp-nuke-turbo.user.js

// ==UserScript==
// @name         Disable Turbo on Basecamp
// @namespace    https://gist.github.com/PedroHLC/e4c7225daea6140bd37357eb3afe79c5
// @version      1.0.1
// @author       PedroHLC, Claude
// @description  Completely disables Turbo Drive and Turbo Frames
// @match        https://*.basecamp.com/*
// @run-at       document-start
// @grant        none
// @updateURL    https://gist.github.com/PedroHLC/e4c7225daea6140bd37357eb3afe79c5/raw/basecamp-nuke-turbo.user.js
// @downloadURL  https://gist.github.com/PedroHLC/e4c7225daea6140bd37357eb3afe79c5/raw/basecamp-nuke-turbo.user.js
// ==/UserScript==

(function() {
    // 1. Add the meta tag that tells Turbo Drive to not handle visits
    const meta = document.createElement('meta');
    meta.name = 'turbo-visit-control';
    meta.content = 'reload';
    document.documentElement.appendChild(meta);

    // 2. Disable Turbo Drive globally once it loads
    document.addEventListener('turbo:before-visit', function(e) {
        e.preventDefault();
        window.location.href = e.detail.url;
    });

    // 3. Disable Turbo Frame loading — force full page navigation
    document.addEventListener('turbo:before-fetch-request', function(e) {
        // Only intercept if it's a full-page navigation, not an inline frame load
        const frame = e.target.closest('turbo-frame');
        if (!frame) {
            e.preventDefault();
            if (e.detail.url) {
                window.location.href = e.detail.url.href || e.detail.url;
            }
        }
    });

    // 4. Disable Turbo prefetch (hover/touchstart prefetching)
    document.addEventListener('turbo:before-prefetch', function(e) {
        e.preventDefault();
    });

    // 5. Nuclear option: neuter the Turbo global when it appears
    Object.defineProperty(window, 'Turbo', {
        set(val) {
            if (val && val.session) {
                val.session.drive = false;
            }
            this._Turbo = val;
        },
        get() { return this._Turbo; },
        configurable: true
    });
})();