Keyboard shortcuts for Instagram Reels on desktop

brainrotmaxxing.js

// ==UserScript==
// @name         Brainrotmaxxing for Instagram Reels
// @namespace    http://tampermonkey.net/
// @version      5.0.0
// @match        https://www.instagram.com/*
// @grant        none
// @description  Keyboard shortcuts for Instagram Reels: L to like/unlike, S to save/remove, C to open comments, P to play/pause, I/K to navigate reels.
// @author       Marco Ceccon (@macedonga)
// ==/UserScript==

(function () {
    "use strict";

    function getMostVisibleVideo() {
        const videos = document.querySelectorAll("video");
        let best = null;
        let bestScore = 0;

        videos.forEach(video => {
            const rect = video.getBoundingClientRect();
            const vh = window.innerHeight;

            const visible =
                Math.min(rect.bottom, vh) - Math.max(rect.top, 0);

            const score = Math.max(0, visible);

            if (score > bestScore) {
                bestScore = score;
                best = video;
            }
        });

        return best;
    }

	function getReelRoot(video) {
	    if (!video) return null;
	
	    let el = video.parentElement;
	
	    while (el && el !== document.body) {
	        const hasVideo = el.querySelector("video");
	        const hasAction =
	            el.querySelector('svg[aria-label="Like"]') ||
	            el.querySelector('svg[aria-label="Unlike"]') ||
	            el.querySelector('svg[aria-label="Save"]') ||
	            el.querySelector('svg[aria-label="Remove"]');
	
	        if (hasVideo && hasAction) {
	            return el;
	        }
	
	        el = el.parentElement;
	    }
	
	    return null;
	}

    function clickSvgByAria(root, label) {
        if (!root) return;

        let labels;
        
        if (label === "Like") {
            labels = ["Like", "Unlike"];
        } else if (label === "Save") {
            labels = ["Save", "Remove"];
        } else {
            labels = [label];
        }

        for (const lbl of labels) {
            const svg = root.querySelector(`svg[aria-label="${lbl}"]`);
            if (svg) {
                const btn = svg.closest('[role="button"]');
                if (btn) btn.click();
                break;
            }
        }
    }

    function togglePlay(video) {
        if (!video) return;
        video.paused ? video.play() : video.pause();
    }

    function scrollReel(direction = "next") {
        const selector =
            direction === "next"
                ? '[aria-label="Navigate to next reel"]'
                : '[aria-label="Navigate to previous reel"]';

        const btn = document.querySelector(selector);
        if (btn) btn.click();
    }

    document.addEventListener("keydown", e => {
        if (
            document.activeElement.tagName === "INPUT" ||
            document.activeElement.tagName === "TEXTAREA" ||
            document.activeElement.isContentEditable
        ) return;

        const video = getMostVisibleVideo();
        const root = getReelRoot(video);

        switch (e.key.toLowerCase()) {
            case "l":
                clickSvgByAria(root, "Like");
                break;

            case "s":
                clickSvgByAria(root, "Save");
                break;

            case "c":
                clickSvgByAria(root, "Comment");
                break;

            case "p":
                togglePlay(video);
                break;

            case "i":
                scrollReel("prev");
                break;

            case "k":
                scrollReel("next");
                break;
        }
    });

})();