BiliBackToBeginning

打开视频时默认回到视频开头处
当前为 2025-04-23 提交的版本，查看最新版本。
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// ==UserScript==
// @name         BiliBackToBeginning
// @namespace    https://github.com/ImQQiaoO/BiliBackToBeginning
// @version      v0.1.1
// @description  打开视频时默认回到视频开头处
// @author       ImQQiaoO
// @match        *://*.bilibili.com/*
// @exclude      *://message.bilibili.com/pages/nav/header_sync
// @exclude      *://message.bilibili.com/pages/nav/index_new_pc_sync
// @exclude      *://data.bilibili.com/*
// @exclude      *://cm.bilibili.com/*
// @exclude      *://link.bilibili.com/*
// @exclude      *://passport.bilibili.com/*
// @exclude      *://api.bilibili.com/*
// @exclude      *://api.*.bilibili.com/*
// @exclude      *://*.chat.bilibili.com/*
// @exclude      *://member.bilibili.com/*
// @exclude      *://www.bilibili.com/tensou/*
// @exclude      *://www.bilibili.com/correspond/*
// @exclude      *://live.bilibili.com/p/html/*
// @exclude      *://live.bilibili.com/live-room-play-game-together
// @exclude      *://www.bilibili.com/blackboard/comment-detail.html*
// @exclude      *://www.bilibili.com/blackboard/newplayer.html*
// @license      MIT
// @grant        none // Explicitly state no special GM functions needed if true
// ==/UserScript==

(function() {
    "use strict";

    const STORAGE_KEY = "reset_bili_video_enabled";

    function setEnabled(flag) {
        localStorage.setItem(STORAGE_KEY, flag ? "1" : "0");
    }

    function getEnabled() {
        return localStorage.getItem(STORAGE_KEY) === "1";
    }

    function createSettingsPanel() {
        // CSS styles for the settings panel and button
        const style = `
            #biliResetPanel {
                position: fixed; bottom: 30px; right: 30px;
                z-index: 99999; background: #fff; color: #333;
                border: 1px solid #bbb; border-radius: 8px;
                box-shadow: 0 6px 16px rgba(0,0,0,.1);
                padding: 18px 26px 18px 18px; font-size: 16px;
                display: none; 
            }
            #biliResetPanel input[type=checkbox] { transform: scale(1.3); margin-right: 8px; }
            #biliResetPanelClose { cursor: pointer; color: #f66; float: right; font-size: 18px; }
            #biliResetPanelBtn {
                position: fixed; bottom: 30px; right: 30px;
                z-index: 99998; background: #ffe2a0; color: #333;
                border: 1px solid #bbb; border-radius: 50%;
                width: 42px; height: 42px; text-align: center; line-height: 42px;
                font-size: 24px; cursor: pointer; box-shadow: 0 3px 12px rgba(0,0,0,.08);
            }
        `;

        const styleEl = document.createElement("style");
        styleEl.textContent = style;
        document.head.appendChild(styleEl);

        // Settings panel HTML
        const panel = document.createElement("div");
        panel.id = "biliResetPanel";
        panel.innerHTML = `
            <span id="biliResetPanelClose" title="关闭设置面板">&times;</span>
            <label>
                <input type="checkbox" id="biliResetSwitch">
                启用自动重置进度到0秒
            </label>
        `;
        document.body.appendChild(panel);

        // Show/hide settings panel button
        const btn = document.createElement("div");
        btn.id = "biliResetPanelBtn";
        btn.title = "打开【重置到0秒】设置";
        btn.textContent = "⚙";
        document.body.appendChild(btn);

        btn.onclick = () => { panel.style.display = "block"; };
        document.getElementById("biliResetPanelClose").onclick = () => { panel.style.display = "none"; };

        document.getElementById('biliResetSwitch').checked = getEnabled();
        document.getElementById('biliResetSwitch').onchange = (e) => {
            setEnabled(e.target.checked);
        };
    }

    function resetBilibiliVideo() {
        const video = document.querySelector("video");
        if (video && getEnabled()) {
            if (video.readyState >= 2) { // Check if video metadata is loaded
                video.currentTime = 0;
                video.play();
                console.log("[B站重置进度脚本] 已直接重置到开头！");
            } else {
                video.addEventListener("loadedmetadata", () => {
                    video.currentTime = 0;
                    video.play();
                    console.log("[B站重置进度脚本] 已直接重置到开头！");
                }, { once: true }); // Use once option to ensure the event listener is removed after first execution
            }
        }
    }

    function observeVideoLoad() {
        let lastHref = "";
        setInterval(() => {
            if (location.href !== lastHref) {
                lastHref = location.href;
                setTimeout(resetBilibiliVideo, 50);
            }
        }, 500);
    }

    createSettingsPanel();
    observeVideoLoad();
    setTimeout(resetBilibiliVideo, 50);
})();
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