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YouTube Watch Later Remove Button on Hover

Show a remove button on hover over video thumbnails in the Watch Later list

您需要先安裝使用者腳本管理器擴展,如 TampermonkeyGreasemonkeyViolentmonkey 之後才能安裝該腳本。

You will need to install an extension such as Tampermonkey to install this script.

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyViolentmonkey 後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyUserscripts 後才能安裝該腳本。

你需要先安裝一款使用者腳本管理器擴展,比如 Tampermonkey,才能安裝此腳本

您需要先安裝使用者腳本管理器擴充功能後才能安裝該腳本。

(我已經安裝了使用者腳本管理器,讓我安裝!)

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

(我已經安裝了使用者樣式管理器,讓我安裝!)

// ==UserScript==
// @name         YouTube Watch Later Remove Button on Hover
// @namespace    http://tampermonkey.net/
// @version      0.6.2
// @description  Show a remove button on hover over video thumbnails in the Watch Later list
// @license MIT
// @match        https://www.youtube.com/*
// @run-at              document-start
// @grant               none
// @inject-into         page
// ==/UserScript==

(function () {
    'use strict';

    let scriptEnable = false;

    const insp = o => o ? (o.polymerController || o.inst || o || 0) : (o || 0);

    function getItemData(menu) {
        if (!menu) return;
        let items = ((menu || 0).menuRenderer || 0).items || 0;
        if (!(items.length >= 1)) return;
        const filtered = items.filter((entry) => {
            if (!entry || typeof entry !== 'object') return false;
            try {
                const t = (JSON.stringify(entry) || '');
                return t.includes('ACTION_REMOVE_VIDEO');
            } catch (e) {
                return false;
            }
        });
        if (filtered.length !== 1) return;
        let itemData = filtered[0];
        itemData = Object.values(itemData).filter(e => e.serviceEndpoint || e.command)[0];
        if (!itemData) return;
        return itemData;
    }

    const removeButtonOnclick = function (e) {
        const button = this;
        if (!scriptEnable) return;

        let videoElement = button.closest('ytd-thumbnail');
        if (!videoElement) return;
        let renderer = videoElement.closest('ytd-playlist-video-renderer.style-scope.ytd-playlist-video-list-renderer');
        if (!renderer) return;

        let data = insp(renderer).data || 0;
        const itemData = getItemData(data.menu);
        if (!itemData) return;

        e.preventDefault(); // Prevent the default action of the event
        e.stopPropagation(); // Stop the event from bubbling up
        e.stopImmediatePropagation(); // Prevents other listeners of the same event from being called

        const cntNode = (document.querySelector('ytd-app') || renderer);

        (function (data) {

            const a = data.serviceEndpoint;
            const b = data.command;

            a && this.ytComponentBehavior.resolveCommand(a);
            b && this.ytComponentBehavior.resolveCommand(b);

        }).call(insp(cntNode), itemData);

    };

    function createRemoveButton(videoElement) {
        let removeButton = document.createElement('button');
        removeButton.className = 'watch-later-remove-button';
        removeButton.textContent = 'Remove';
        removeButton.style.position = 'absolute';
        removeButton.style.top = '5px';
        removeButton.style.right = '5px';
        removeButton.style.zIndex = '1000';

        removeButton.onclick = removeButtonOnclick;
        videoElement.appendChild(removeButton);
    }

    const mouseenterHandler = function (e) {
        if (!e || !(e.target instanceof HTMLElement)) return;
        if (!scriptEnable) return;
        if (!e.target.classList.contains('ytd-playlist-video-renderer')) return;
        let videoElement = e.target.closest('ytd-thumbnail');
        if (!videoElement) return;
        let renderer = videoElement.closest('ytd-playlist-video-renderer.style-scope.ytd-playlist-video-list-renderer');
        if (!renderer || renderer.is !== 'ytd-playlist-video-renderer') return;
        let data = insp(renderer).data || 0;
        let itemData = getItemData(data.menu);
        if (!itemData) return;
        let button = videoElement.querySelector('button.watch-later-remove-button')
        if (!button) {
            createRemoveButton(videoElement);
        } else {
            button.style.display = '';
        }
    };

    const mouseleaveHandler = function (e) {
        if (!e || !(e.target instanceof HTMLElement)) return;
        if (!e.target.classList.contains('ytd-playlist-video-renderer')) return;
        let button = e.target.querySelector('button.watch-later-remove-button');
        if (button) {
            button.style.display = 'none';
        }
    };


    document.addEventListener('yt-navigate-finish', () => {

        const newEnable = location.pathname === '/playlist' && location.search.includes('list=WL');

        if (scriptEnable ^ newEnable) {

            if (scriptEnable) {
                scriptEnable = false;
                document.removeEventListener('mouseenter', mouseenterHandler, true);
                document.removeEventListener('mouseleave', mouseleaveHandler, true);
            } else if (newEnable) {
                scriptEnable = true;
                document.addEventListener('mouseenter', mouseenterHandler, true);
                document.addEventListener('mouseleave', mouseleaveHandler, true);
            }

        }

    }, false);

})();