kuaishou downloader

kuaishou_downloader.js

// ==UserScript==
// @name         kuaishou_easy_download
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       Sambat
// @match        https://www.kuaishou.com/short-video/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        GM_download
// ==/UserScript==

(function () {
    'use strict';
    const MobileUA ="Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1";
    function addDownloadButton() {
        const buttonEl = document.createElement("button");
        buttonEl.textContent = "Download";
        document.body.appendChild(buttonEl);
        buttonEl.style.position = 'fixed'
        buttonEl.style.zIndex = '10000'
        buttonEl.style.top = '0'
        buttonEl.style.left = '0'
        buttonEl.style.width = '25%'
        buttonEl.style.height = '60px'
        let videourl = document.querySelector("video.player-video").src;
        let fileName = `${document.querySelector("p.video-info-title").innerText}.mp4`

        buttonEl.addEventListener("click", () => {
            GM_download({
                url: videourl,
                headers: {
                    "user-agent": MobileUA,
                },
                name: fileName,
            });
        });
    }
    addDownloadButton();
})();