RightClick_ScrollBar_BackToTop.user.js

// ==UserScript==
// @name         Right click scroll bar back to top
// @name:zh-CN   右键滚动条回到顶部
// @name:zh-TW   右鍵滾動條回到頂部
// @name:en      Right click scroll bar back to top
// @version      1.0.0
// @author       X.I.U
// @description  Right-click the scroll bar on the right side of the webpage to return to the top
// @description:zh-CN  鼠标右键网页右侧的滚动条即可回到顶部
// @description:zh-TW  鼠標右鍵網頁右側的滾動條即可回到頂部
// @description:en  Right-click the scroll bar on the right side of the webpage to return to the top
// @match        *://*/*
// @icon         data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAALfElEQVRYhX2Xe3Bd1XXGf3vvc859X+nq6nUlW5Yly7JlI2xsYzAwtnk4ATpAxkNTHm0mnaTT/gHTTvrIBDLTpp1JUoZppqHQls5AKTR2INOWJJQSXF4x2BhsJCRZ8kuWZckPSVf3/Trn7N3RVTFpQrNn1l97n7O/vda31reWMKMPcmUJA9U8vrwHGdqCHn4HPzePaIxhVSoYbYRXrn7BeMVbCUduF6kVUXHwvQP+6amDaqDnoIompmQytaBnTmB8H5lowrjgFss48SBeI/hUEEZeudLi1ywhJEIJdL6Q8rzal/1a5SGC4XZrYBvWwEZobMdLdH6RH+z/Io1taEeh52fe8tOZbysl/ouWFvANYP7fSz4DgAEBBIL4xiS8ubmnVcTZK68aRK29Dtm8dgnZJydRW+/E2nrnp19nz+7U77+60zt0qMz07J/KxuQTwrIw4rMBCDP6wC+FIIcO34eudDdXf/7jD52Opi772lugY3AZr++hp06gz48j+waRqTWYmVHcS+chEMFeuw1hBzBzY7g/fQE9fmqBYPzBQKrpVa/R4OkCAnXlSvXnX9sIllk220BE4Z8OdHoj54YCK6Od1i2/iUmuRyDRk6NUn3+M0pv/hnf0AE40jEjEqP3oe6Rf/CGOWUTNjFKby2MP7EBtugURFWFxfOhB4+o4yfhrGAdZsxHaqZt6dNce9KXYFSPfGWS68JFqTXSqO7+MCaTqETGTwxSeeoRCOoPT2YUIhFC2jbQF/uwUatU6rPbVUM5T+OfHUO3dWKv6kSsGUIOD6PEPr+fswnanpecFZYVQhFAyjPS9Tj4xw2rcU+pJApEutWsvRjaBW8NUShilkE1JIqlUPfi6VMLNFTBVr+7KYKqJ8uEjlM+dJrR5K0L7eB+9hTd2CFrWYt33h0jH3O5Nj37TBGtgZUBkUN/6q4dQ7UmsnlW450//gU5PPRq460uQXAu+j//i99A/+UdUMoXqbMNkz2OnUkixlF4u9spe/HMTULyEaA7jXkoT2fEbQIXi838DJ4cRDXHkEjc2b0MPHdptZubGpBUbM0UfKQpBRDmKWRSD3tTMk87gddA2WGe4+dkzMD0CyQ5qP/4XVDCAvfkaLMvHamzEClpQzGDF46iuJOH1CaKr2tDZRfzhQ0Ru24NYsYrCM4/jDb+FiHdi3XU/0s3vr7WsGKxcfyPSy+bxi0UqJ8f/IriiE2vrnuWsLefQk8NoO4AMBBB9/XjDI6hQCjdTxq9WCaQ6ULaDFrIeKr3oIlv70Olz2K1xlAVaSUQojD786nKi9e5A3LBHMHn0W+LUUaS1FI9q+iZZWLhHdq/FxFbWSSfsIDIQwVw4g/GK2OuuhloNMzaCaF+DNBJtQfX8LFYigElX0OkQtZKHVy3jqwDlqWncCzPI3nU4t+2FWrH+OLHzHpRl3109memTOhqDi9NfkefHEKvWLTO+VKD68Qf4G27CueFWhJ/Df+0lVFcXJOJYnobm1ZjsJUxuFjyDjK/GNK2gND4ESuDPXcCOSaI7thPqX0ft8OtUn/oTKOQgkET39KJU4RbpZXOtNRW717p+FyRSdYT+v36H4u/fQXbfc3iRDkT3FsTGjWAWEU0OZKfAU9CyEdXVD2lQPduplmo4jkBEbMzK1VgDu5EVTe3gm1RHx6Bcxpz6YLkEO0lMYeFGi6z7eVMqhkT/ZrCb0LNT+NMTRH/nt/BLRdy3X8Nv68Lu6cZEHURjE6K3hirYeLRhDWyA4jxzH40RXJwkeuM29MpN+JcziEsz+Avz6GgcW1pYbUlEQCyHwYpSyxS7rGo+v8man4ZMATrAHf+QSt7FTkWR4QbsjlbIX8IMH0VuuAqj4piGAbhmEPPzI/injnNxMUPuwOtseOIxKKTJ7/8BTBxDdXcjO9sJdTeg01VqH4wg3CDB9bshHMKORbGolVOmeRW09dVdUxkbp3ruNM7GXnS1hK5OYSoSbBDZBcxCBtF3DcUzk6hkhGA0RmtHKx1rOkE04lbzWC1tqMRt1CZHUafPIs8H6/JsNTcgN+9YFq1qgbBUFUvnK9qrVghXCvWN8MBmivueJDtylqaeBKWJaXR4JZEtNyBWrkGt6AJboCZO4J49Rc64xGIhcgtZgm6egKhgtUQQto17WeHOLqCNj5Vowbr7q4j+Lcs1JhhEphcXLTebd0jPwpkx6Lwa++bbCR95ALecp5a6BrvrJoLdHajmMOTnKb3+BrVMntjARpzeFbz8jcfpa22gGm+kMJlm95Zu9M9+iI5G0G3d6EgIUSnjzs/gv/Icgd6rqcvz0IeYWnXc8pEtYnEe8gtXNL7xz74LehHSE3DqNP7EIdx3p5DSh7JNJePiBE/gN3Uz8NWHae5sRJYXqKQvU+raQPg7L6L3/QNMHcfp6EREGjC5LDp9GaOs5VQ/NQI93YctOxFPlwniDh/C3n47JHvrQPTBl3DHjiIDQUQ4jGhOYcqaQFuE0Nl53OnLRHfsZV33KsTxd6GlHeaP477zMl5uAWv7dkyLg6kZREsb+vgCcvPOuoaYuWNQWERs3jAuQ6nooXK6TH566cXnrjQK7uwFaoseWA3oJf2WEhEJUjm/gMgXCfdvQlFFv/R3uCND6FIRv7MfMnOIiaPoI/8NEb2kWAhfoLbdjLr2jmUv/8f+pVbkHRGNnZHum2/udxxtCn4j/vgEIjNTD4O9upfIprUYoxBKo9Z14jumTq7YYD9WayvuR++hs1lkshmha4iuNeDYiIAFMoCevIi+cJHaa29gmvsRTUn0R29g9u1D7bxxv+jrRnpD56cCkdjfV9NzpA+8A5VlLojWAczlGVTAYKXimIU8MlsjtKEXgiF0aRGdm8cEYnXm+O+/gdAGuWsP3shhTHoOEYqCCEF2DsrF5f+e/xiikUldrT6l3z+GevSaTahaZdRY6uFqxRXR1sRyzU/21Gu6OTOMfzmPd6kI8TgiX8B4imouj1QCKmVUNITJ59AnR1F77kH4ZaRnQFroMyeRW3egdt6DwIX391Gshv+4LK2jtcuLqK9t7ALjZXzH1uVM/mb/7BTRnjZEex+idQ2EAnjjR/BdF1PIoV2Bae/F/fh9dL5IYE0XUmpMNo+ev4AINSJWb0UPHa63Z7SvRN3/CHJpFHj2G4iZzAuBbTu+GWpIEGxrQ/3RnlvxG5M4kYa3Lc2u4uyFblnIE+xfAbF2RMtqZGsn/uTYUgHH+dz9eFMnqYx8gO+CEwkjhcDPF/DLHurSaeTm3RiWMsDHeuDrSFvBv3+bi08+N1Vwuj/vZWtu+dwclZlFrESoeZmZysJXoTsCjnVk8dDQBuN+n8RDD9fbcdG7leBX1iOkQjhBOHmQfKGAHW3CS6fR+QClmYuYMyPY265DtPVgtfctiw4V/GcfYfGNQzj3/u4DqlormUoZEQwuc0I//eSnY4G0wPJjmdGhw+mh0fWxNZ0037cXccPd1MXgk+GjNE/tR3+Le+YEyg5TnT6LXlwgcu1u7C99HZlsv3K2+vjvkTs2RvDe3747tm7Dy1SKvzSYPP/MLwxFAkIKEzEye2zswOXX395lJyK0fOFzRHfuglQfqPin59Nn0RNDuJk09vprkd0brmx5H7xCbfgQbrZ83OkfvN1pj0+ZmkBYNhjzCwCeffr/AsBDJyU6kqBwbPzRuTcP/GXV82lYlaJpfQ+BjVdhXX0tNKTAjvzKqKXPTeC++1NKY0c9kVz1SGzb9X8tjIdfzSFCDfUw/noA0scPuxBrwcvmmH3rQIvMm3/y0XdJS4JfIpiIUG9g+wcg6KDnZpGZNDQ0Ii5cSAtlPRHYct13axWvJNwadiiAli4iEP8VAJ89HQtR129TLiG1nos0Nt8dSOi12qi9lRq3utVqT/lirql24hW3vLBQi3d3XUqu73+PZOonBNR/WnbYSMeGTO5/Xf6ZtwDwPwtFRezQVs+sAAAAAElFTkSuQmCC
// @grant        none
// @license      GPL-3.0 License
// @run-at       document-end
// @namespace    https://github.com/XIU2/UserScript
// ==/UserScript==

(function() {
    'use strict';
    // 获取网页右侧滚动条宽度（如果获取不到就默认 15）
    const scrollBarWidth = getScrollBarWidth() || 15
    document.addEventListener('contextmenu', function(e) {
        // 检查右键点击的位置是否在滚动条区域（鼠标右键点击位置的水平坐标值 大于 网页宽度 - 滚动条宽度 - 10的冗余）
        const isScrollbar = e.clientX > window.innerWidth - scrollBarWidth - 10;
        if (isScrollbar) {
            // 如果右键点击到的元素是 HTML，说明确定是点到了滚动条上面（点击事件会被浏览器透过滚动条响应给网页最根部的 HTML）
            if (e.target.tagName === 'HTML') {
                window.scrollTo(0,0);
            } else if (e.target.tagName !== 'BODY') { // 如果右键点击到的既不是 HTML，也不是 BODY（因为右键单击滚动条左侧区域基本上都是 BODY 这个背景元素），那么可能是点击到了网页内嵌套元素的滚动条，那么就只需要这个元素回到顶部即可
                e.target.scrollTo(0,0);
            }
            e.preventDefault(); // 阻止默认事件（即弹出右键菜单）
            e.stopPropagation(); // 停止继续向上冒泡（即向上传播触发其他的委托点击事件）
        }
    });

    // 获取网页右侧滚动条宽度
    function getScrollBarWidth() {
        // 创建一个临时的 div 元素
        const div = document.createElement('div');
        div.style.overflow = 'scroll'; // 强制出现滚动条
        div.style.visibility = 'hidden'; // 不要显示出来
        //div.style.msOverflowStyle = 'scrollbar'; // needed for WinJS apps?
        div.style.width = '100px'; // 设置宽度
        div.style.height = '100px'; // 设置高度
        document.body.appendChild(div); // 将 div 添加到文档

        // 创建一个内嵌的 div
        const innerDiv = document.createElement('div');
        innerDiv.style.width = '100%'; // 设置宽度为 100%
        innerDiv.style.height = '100%'; // 设置高度为 100%
        div.appendChild(innerDiv); // 将内嵌 div 添加到外部 div

        // 计算滚动条宽度
        const scrollBarWidth = div.offsetWidth - innerDiv.offsetWidth;

        // 移除临时 div
        div.parentNode.removeChild(div);

        return scrollBarWidth; // 返回滚动条宽度
    }
})();