Open image or link embedded within a tweet

twitter.user.js

// ==UserScript==
// @name        Open image or link embedded within a tweet
// @namespace   https://twitter.com/
// @version     1
// @include     https://twitter.com/*
// @grant       none
// ==/UserScript==

(function () {
    document.addEventListener('keydown', function (e) {
        const keyName = e.key;

        if (keyName === 'Control' || !e.ctrlKey) {
            return;
        }

        let elToFocusSelector;

        switch (keyName) {
            case 'i':
                openImage();
                break;

            case 'l':
                openInaccessibleLink();
                break;

            default:
                return;
        }

        e.preventDefault();
    });

    function openImage () {
        const activeEl = document.activeElement;

        if (activeEl == null) {
            return;
        }

        const tweet = activeEl.closest('.tweet');
        const maybeIFrame = tweet.querySelector('iframe');
        let imgElList;

        if (maybeIFrame != null) {
            imgElList = maybeIFrame.contentWindow.document.body.querySelectorAll('.SummaryCard-image img');
        }
        else {
            imgElList = tweet.querySelectorAll('.AdaptiveMedia img');
        }
        
        if (imgElList.length === 0) {
            return;
        }
        
        Array.prototype.slice.call(imgElList)
            .filter(imgEl => imgEl.src != null)
            .forEach(imgEl => setTimeout(() => window.open(imgEl.src), 10));
    }

    function openInaccessibleLink () {
        const activeEl = document.activeElement;

        if (activeEl == null) {
            return;
        }

        const tweet = activeEl.closest('.tweet');
        const maybeIFrame = tweet.querySelector('iframe');

        if (maybeIFrame == null) {
            return;
        }

        const linkEl = maybeIFrame.contentWindow.document.body.querySelector('a.TwitterCard-container--clickable');

        if (linkEl != null && linkEl.href != null) {
            setTimeout(() => window.open(linkEl.href), 10);
        }
    }
})();