这是我现在正在使用的代码。在webkit浏览器(特别是Chrome和Safari)上,如果页面已滚动,则不会考虑页面已滚动的数量。我需要帮助重新设计该功能以使其适用于Webkit浏览器。而且我不想加载jQuery,因为它将在Web小部件上使用,并且我需要减小文件大小。谢谢你们!
function __getIEVersion() {
var rv = -1; // Return value assumes failure.
if (navigator.appName == 'Microsoft Internet Explorer') {
var ua = navigator.userAgent;
var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
if (re.exec(ua) != null)
rv = parseFloat(RegExp.$1);
}
return rv;
}
function __getOperaVersion() {
var rv = 0; // Default value
if (window.opera) {
var sver = window.opera.version();
rv = parseFloat(sver);
}
return rv;
}
var __userAgent = navigator.userAgent;
var __isIE = navigator.appVersion.match(/MSIE/) != null;
var __IEVersion = __getIEVersion();
var __isIENew = __isIE && __IEVersion >= 8;
var __isIEOld = __isIE && !__isIENew;
var __isFireFox = __userAgent.match(/firefox/i) != null;
var __isFireFoxOld = __isFireFox && ((__userAgent.match(/firefox\/2./i) != null) ||
(__userAgent.match(/firefox\/1./i) != null));
var __isFireFoxNew = __isFireFox && !__isFireFoxOld;
var __isWebKit = navigator.appVersion.match(/WebKit/) != null;
var __isChrome = navigator.appVersion.match(/Chrome/) != null;
var __isOpera = window.opera != null;
var __operaVersion = __getOperaVersion();
var __isOperaOld = __isOpera && (__operaVersion < 10);
function __parseBorderWidth(width) {
var res = 0;
if (typeof(width) == "string" && width != null && width != "" ) {
var p = width.indexOf("px");
if (p >= 0) {
res = parseInt(width.substring(0, p));
}
else {
//do not know how to calculate other values
//(such as 0.5em or 0.1cm) correctly now
//so just set the width to 1 pixel
res = 1;
}
}
return res;
}
//returns border width for some element
function __getBorderWidth(element) {
var res = new Object();
res.left = 0; res.top = 0; res.right = 0; res.bottom = 0;
if (window.getComputedStyle) {
//for Firefox
var elStyle = window.getComputedStyle(element, null);
res.left = parseInt(elStyle.borderLeftWidth.slice(0, -2));
res.top = parseInt(elStyle.borderTopWidth.slice(0, -2));
res.right = parseInt(elStyle.borderRightWidth.slice(0, -2));
res.bottom = parseInt(elStyle.borderBottomWidth.slice(0, -2));
}
else {
//for other browsers
res.left = __parseBorderWidth(element.style.borderLeftWidth);
res.top = __parseBorderWidth(element.style.borderTopWidth);
res.right = __parseBorderWidth(element.style.borderRightWidth);
res.bottom = __parseBorderWidth(element.style.borderBottomWidth);
}
return res;
}
//returns the absolute position of some element within document
function getElementAbsolutePos(element) {
var res = new Object();
res.x = 0; res.y = 0;
if (element !== null) {
if (element.getBoundingClientRect) {
var viewportElement = document.documentElement;
var box = element.getBoundingClientRect();
var scrollLeft = viewportElement.scrollLeft;
var scrollTop = viewportElement.scrollTop;
res.x = box.left + scrollLeft;
res.y = box.top + scrollTop;
}
else { //for old browsers
res.x = element.offsetLeft;
res.y = element.offsetTop;
var parentNode = element.parentNode;
var borderWidth = null;
while (offsetParent != null) {
res.x += offsetParent.offsetLeft;
res.y += offsetParent.offsetTop;
var parentTagName =
offsetParent.tagName.toLowerCase();
if ((__isIEOld && parentTagName != "table") ||
((__isFireFoxNew || __isChrome) &&
parentTagName == "td")) {
borderWidth = kGetBorderWidth
(offsetParent);
res.x += borderWidth.left;
res.y += borderWidth.top;
}
if (offsetParent != document.body &&
offsetParent != document.documentElement) {
res.x -= offsetParent.scrollLeft;
res.y -= offsetParent.scrollTop;
}
//next lines are necessary to fix the problem
//with offsetParent
if (!__isIE && !__isOperaOld || __isIENew) {
while (offsetParent != parentNode &&
parentNode !== null) {
res.x -= parentNode.scrollLeft;
res.y -= parentNode.scrollTop;
if (__isFireFoxOld || __isWebKit)
{
borderWidth =
kGetBorderWidth(parentNode);
res.x += borderWidth.left;
res.y += borderWidth.top;
}
parentNode = parentNode.parentNode;
}
}
parentNode = offsetParent.parentNode;
offsetParent = offsetParent.offsetParent;
}
}
}
var scrOfX = 0, scrOfY = 0;
if( typeof( window.pageYOffset ) == 'number' ) {
//Netscape compliant
scrOfY = window.pageYOffset;
scrOfX = window.pageXOffset;
} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
//DOM compliant
scrOfY = document.body.scrollTop;
scrOfX = document.body.scrollLeft;
} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
//IE6 standards compliant mode
scrOfY = document.documentElement.scrollTop;
scrOfX = document.documentElement.scrollLeft;
}
return res;
}
最佳答案
if (element.getBoundingClientRect) {
var viewportElement = document.documentElement;
var box = element.getBoundingClientRect();
var scrollLeft = viewportElement.scrollLeft;
var scrollTop = viewportElement.scrollTop;
res.x = box.left + scrollLeft;
res.y = box.top + scrollTop;
}
我担心此代码块仅使用一种尝试检测滚动位置的方式。我将代码的底部代码移动到函数的顶部,并使用scrOfX / Y而不是scrollLeft和scrollTop。
关于javascript - 尝试在屏幕上查找javascript元素的位置…在Webkit浏览器上无法正常工作,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/9967735/