Browser Game Slowdown のソースコード

Browser Game Slowdown

Universal Pointer Lock Toggle
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// ==UserScript==
// @name         Browser Game Slowdown
// description  slow down browser games
// @match        *://*/*
// @grant        none
// @version 0.0.1.20260306235559
// @namespace https://greasyfork.org/users/1547770
// @description Universal Pointer Lock Toggle
// ==/UserScript==

(function() {
    let slowdown = 4; // 2 = half speed, 4 = quarter speed, 8 = super slow
    let frame = 0;

    const originalRAF = window.requestAnimationFrame;

    window.requestAnimationFrame = function(callback) {
        frame++;
        if (frame % slowdown === 0) {
            return originalRAF.call(window, callback);
        }
    };

    // Press "L" to toggle slowdown on/off
    let enabled = true;
    document.addEventListener("keydown", e => {
        if (e.key.toLowerCase() === "l") {
            enabled = !enabled;
            window.requestAnimationFrame = enabled
                ? function(callback) {
                    frame++;
                    if (frame % slowdown === 0) {
                        return originalRAF.call(window, callback);
                    }
                }
                : originalRAF;
        }
    });
})();