JavaScript常用工具函数大全(5)

function loadStyle(url) { try { document.createStyleSheet(url); } catch (e) { var cssLink = document.createElement("link"); cssLink.rel = "stylesheet"; cssLink.type = "text/css"; cssLink.href = url; var head = document.getElementsByTagName("head")[0]; head.appendChild(cssLink); } }

替换地址栏

function locationReplace(url) { if (history.replaceState) { history.replaceState(null, document.title, url); history.go(0); } else { location.replace(url); } }

解决offsetX兼容性问题

// 针对火狐不支持offsetX/Y function getOffset(e) { var target = e.target, // 当前触发的目标对象 eventCoord, pageCoord, offsetCoord; // 计算当前触发元素到文档的距离 pageCoord = getPageCoord(target); // 计算光标到文档的距离 eventCoord = { X: window.pageXOffset + e.clientX, Y: window.pageYOffset + e.clientY }; // 相减获取光标到第一个定位的父元素的坐标 offsetCoord = { X: eventCoord.X - pageCoord.X, Y: eventCoord.Y - pageCoord.Y }; return offsetCoord; } function getPageCoord(element) { var coord = { X: 0, Y: 0 }; // 计算从当前触发元素到根节点为止， // 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和 while (element) { coord.X += element.offsetLeft; coord.Y += element.offsetTop; element = element.offsetParent; } return coord; }

打开一个窗体通用方法

function openWindow(url, windowName, width, height) { var x = parseInt(screen.width / 2.0) - width / 2.0; var y = parseInt(screen.height / 2.0) - height / 2.0; var isMSIE = navigator.appName == "Microsoft Internet Explorer"; if (isMSIE) { var p = "resizable=1,location=no,scrollbars=no,width="; p = p + width; p = p + ",height="; p = p + height; p = p + ",left="; p = p + x; p = p + ",top="; p = p + y; retval = window.open(url, windowName, p); } else { var win = window.open( url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" ); eval("try { win.resizeTo(width, height); } catch(e) { }"); win.focus(); } }

将键值对拼接成URL带参数

export default const fnParams2Url = obj=> { let aUrl = [] let fnAdd = function(key, value) { return key + '=' + value } for (var k in obj) { aUrl.push(fnAdd(k, obj[k])) } return encodeURIComponent(aUrl.join('&')) }

去掉url前缀

function removeUrlPrefix(a) { a = a .replace(/：/g, ":") .replace(/．/g, ".") .replace(/／/g, "https://www.jb51.net/"); while ( trim(a) .toLowerCase() .indexOf("http://") == 0 ) { a = trim(a.replace(/http:\/\//i, "")); } return a; }

替换全部

String.prototype.replaceAll = function(s1, s2) { return this.replace(new RegExp(s1, "gm"), s2); };

resize的操作

(function() { var fn = function() { var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth, r = 1255, b = Element.extend(document.body), classname = b.className; if (w < r) { //当窗体的宽度小于1255的时候执行相应的操作 } else { //当窗体的宽度大于1255的时候执行相应的操作 } }; if (window.addEventListener) { window.addEventListener("resize", function() { fn(); }); } else if (window.attachEvent) { window.attachEvent("onresize", function() { fn(); }); } fn(); })();

滚动到顶部

// 使用document.documentElement.scrollTop 或 document.body.scrollTop 获取到顶部的距离，从顶部 // 滚动一小部分距离。使用window.requestAnimationFrame()来滚动。 // @example // scrollToTop(); function scrollToTop() { var c = document.documentElement.scrollTop || document.body.scrollTop; if (c > 0) { window.requestAnimationFrame(scrollToTop); window.scrollTo(0, c - c / 8); } }

设置cookie值

function setCookie(name, value, Hours) { var d = new Date(); var offset = 8; var utc = d.getTime() + d.getTimezoneOffset() * 60000; var nd = utc + 3600000 * offset; var exp = new Date(nd); exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000); document.cookie = name + "=" + escape(value) + ";path=https://www.jb51.net/;expires=" + exp.toGMTString() + ";domain=360doc.com;"; }

设为首页

function setHomepage() { if (document.all) { document.body.style.behavior = "url(#default#homepage)"; document.body.setHomePage("http://w3cboy.com"); } else if (window.sidebar) { if (window.netscape) { try { netscape.security.PrivilegeManager.enablePrivilege( "UniversalXPConnect" ); } catch (e) { alert( "该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true" ); } } var prefs = Components.classes[ "@mozilla.org/preferences-service;1" ].getService(Components.interfaces.nsIPrefBranch); prefs.setCharPref("browser.startup.homepage", "http://w3cboy.com"); } }

按字母排序，对每行进行数组排序