低視聴回数動画の非表示

YouTubeにて再生回数が少ない動画を非表示にします。
当前为 2025-02-21 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         低視聴回数動画の非表示
// @namespace    http://tampermonkey.net/
// @description  YouTubeにて再生回数が少ない動画を非表示にします。
// @author       sun
// @match        *://*.youtube.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @grant        none
// @version      1.2
// ==/UserScript==

const VIEW_THRESHOLD = 180000; // ここを変更して視聴回数のしきい値を設定

function parseViewCount(text) {
    let numText = text.replace(/[^0-9\.KM万億]/g, "");
    const multipliers = { "K": 1000, "M": 1000000, "万": 10000, "億": 100000000 };

    let multiplier = Object.keys(multipliers).find(unit => numText.includes(unit)) || "";
    numText = numText.replace(multiplier, "");

    return numText ? parseFloat(numText) * (multipliers[multiplier] || 1) : 0;
}

function IsBadVideo(videoViews) {
    if (!videoViews) {
        return false;
    }

    let text = videoViews.innerText;
    let viewCount = parseViewCount(text);

    return viewCount > 0 && viewCount < VIEW_THRESHOLD;
}

function HideBadVideo(videoElement) {
    if (!videoElement) return;

    let videoViews = videoElement.querySelector(".inline-metadata-item.style-scope.ytd-video-meta-block");

    if (IsBadVideo(videoViews)) {
        videoElement.style.display = "none";
    }
}

const observer = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            HideBadVideo(entry.target);
            observer.unobserve(entry.target);
        }
    });
}, { rootMargin: "300px" });

function Update() {
    let videos = document.querySelectorAll("ytd-rich-item-renderer, ytd-compact-video-renderer");
    videos.forEach(video => {
        HideBadVideo(video); 
        observer.observe(video);
    });
}

window.addEventListener("load", () => {
    Update();

    // YouTubeのSPA遷移を検知してUpdate()を実行
    const checkNavigation = () => {
        let ytApp = document.querySelector("ytd-app");
        if (ytApp) {
            ytApp.addEventListener("yt-navigate-finish", () => {
                setTimeout(Update, 500); 
            });
        }
    };
    checkNavigation();

    const mutationObserver = new MutationObserver((mutations) => {
        mutations.forEach((mutation) => {
            mutation.addedNodes.forEach((node) => {
                if (node.nodeType === 1) {
                    if (node.matches("ytd-rich-item-renderer, ytd-compact-video-renderer")) {
                        observer.observe(node);
                    } else {
                        let newVideos = node.querySelectorAll?.("ytd-rich-item-renderer, ytd-compact-video-renderer");
                        newVideos.forEach(video => observer.observe(video));
                    }
                }
            });
        });
    });

    mutationObserver.observe(document.body, { childList: true, subtree: true });
});
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