JQuery辅助文本框在浏览器中固定位置,不随浏览器滚动条滚动
สคริปต์นี้ไม่ควรถูกติดตั้งโดยตรง มันเป็นคลังสำหรับสคริปต์อื่น ๆ เพื่อบรรจุด้วยคำสั่งเมทา // @require https://update.greasyfork.org/scripts/388372/726659/scrollfix.js
// ==UserScript== // @name scrollfix // @version 0.0.1 // @namespace tsharp.js // @description JQuery辅助文本框在浏览器中固定位置,不随浏览器滚动条滚动 // @author jimbo // @license GPLv3 // @match * // @icon none // @require http://code.jquery.com/jquery-3.4.1.min.js // ==/UserScript== ; (function ($) { jQuery.fn.scrollFix = function (height, dir) { height = height || 0; height = height == "top" ? 0 : height; return this.each(function () { if (height == "bottom") { height = document.documentElement.clientHeight - this.scrollHeight; } else if (height < 0) { height = document.documentElement.clientHeight - this.scrollHeight + height; } var that = $(this), oldHeight = false, p, r, l = that.offset().left; dir = dir == "bottom" ? dir : "top"; //默认滚动方向向下 if (window.XMLHttpRequest) { //非ie6用fixed function getHeight() { //>=0表示上面的滚动高度大于等于目标高度 return (document.documentElement.scrollTop || document.body.scrollTop) + height - that.offset().top; } $(window).scroll(function () { if (oldHeight === false) { if ((getHeight() >= 0 && dir == "top") || (getHeight() <= 0 && dir == "bottom")) { oldHeight = that.offset().top - height; that.css({ position: "fixed", top: height, left: l }); } } else { if (dir == "top" && (document.documentElement.scrollTop || document.body.scrollTop) < oldHeight) { that.css({ position: "fixed" }); oldHeight = false; } else if (dir == "bottom" && (document.documentElement.scrollTop || document.body.scrollTop) > oldHeight) { that.css({ position: "fixed" }); oldHeight = false; } } }); } else { //for ie6 $(window).scroll(function () { if (oldHeight === false) { //恢复前只执行一次,减少reflow if ((getHeight() >= 0 && dir == "top") || (getHeight() <= 0 && dir == "bottom")) { oldHeight = that.offset().top - height; r = document.createElement("span"); p = that[0].parentNode; p.replaceChild(r, that[0]); document.body.appendChild(that[0]); that[0].style.position = "absolute"; } } else if ((dir == "top" && (document.documentElement.scrollTop || document.body.scrollTop) < oldHeight) || (dir == "bottom" && (document.documentElement.scrollTop || document.body.scrollTop) > oldHeight)) { //结束 that[0].style.position = "absolute"; p.replaceChild(that[0], r); r = null; oldHeight = false; } else { //滚动 that.css({ left: l, top: height + document.documentElement.scrollTop }) } }); } }); }; })(jQuery);