前端开发跨浏览器计算页面大小滚动高度
Posted phlsheji
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前端开发中跨平台。跨USER-AGENT的适配很繁琐
想要得到浏览器px大小非常烦。因此以下2个函数非常实用
这两个javascript函数很有用,用来计算浏览器页面大小,窗体大小,以及滚动高度,源码例如以下:
function getPageSize() {
var xScroll, yScroll;
if (window.innerHeight && window.scrollMaxY) {
xScroll = window.innerWidth + window.scrollMaxX;
yScroll = window.innerHeight + window.scrollMaxY;
} else if (document.body.scrollHeight > document.body.offsetHeight) { // all but Explorer Mac
xScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth, windowHeight;
if (self.innerHeight) { // all except Explorer
if (document.documentElement.clientWidth) {
windowWidth = document.documentElement.clientWidth;
} else {
windowWidth = self.innerWidth;
}
windowHeight = self.innerHeight;
} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
} else if (document.body) { // other Explorers
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}
var pageHeight, pageWidth;
// for small pages with total height less then height of the viewport
pageHeight = yScroll < windowHeight ? windowHeight: yScroll;
// for small pages with total width less then width of the viewport
pageWidth = xScroll < windowWidth ? windowWidth: xScroll;
return {
pageWidth: pageWidth,
pageHeight: pageHeight,
windowWidth: windowWidth,
windowHeight: windowHeight
};
}
function getPageScroll() {
var xScroll, yScroll;
if (self.pageYOffset) {
yScroll = self.pageYOffset;
xScroll = self.pageXOffset;
} else if (document.documentElement && document.documentElement.scrollTop) { // Explorer 6 Strict
yScroll = document.documentElement.scrollTop;
xScroll = document.documentElement.scrollLeft;
} else if (document.body) { // all other Explorers
yScroll = document.body.scrollTop;
xScroll = document.body.scrollLeft;
}
return {
xScroll: xScroll,
yScroll: yScroll
};
}
參考 http://my.oschina.net/jockchou/blog/465220
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