CSSOM View Module

CSS Object Model 视图模式

CSSOM视图模式提供了一些API，用于检测和处理文档的可视化视图，主要包括以下几个方面：

Window视图属性

innerWidth & innerHeight

The width/height of the viewport, including the size of a rendered scrollbar.
可视区的宽高，包括滚动条的大小。

outerWidth & outerHeight

The width/height of the client window.
浏览窗口的宽高。

scrollX & scrollY

X-coordinate/Y-coordinate, relative to the initial containing block origin, of left/top of the viewport.
相对于初始包含块的起始位置可视区滚动的X坐标和Y坐标值。

pageXOffset & pageYOffset

Same with the value returned by scrollX/scrollY
与scrollX和scrollY的返回值相同。

screenX & screenY

X-coordinate/Y-coordinate, relative to the origin of the screen of the output device, of the left/top of the client window.
用户浏览窗口相对于输出设备的X/Y坐标值。

兼容性：IE9+, FF3.0+, Saf4.0+, Chrome4+

screen interface

availWidth & availHeight

The available width/height of the rendering surface of the output device, excluding the taskbar.
输出设备的可渲染窗口宽高，不包括任务栏大小。
兼容性：IE5.5+, FF3.0+, Saf4.0+, Chrome4+

width & height

The width/height of the output device.
输出设备的宽高。
兼容性：IE5.5+, FF3.0+, Saf4.0+, Chrome4+

colorDepth

24
显示器的颜色深度。
兼容性：IE5.5+, FF3.0+, Saf4.0+, Chrome4+

pixelDepth

24
与colorDepth相同。
兼容性：IE9+, FF3.0+, Saf4.0+, Chome4+

HTML DOM Element

scrollTop & scrollLeft

Y-coordinate/X-coordinate of the scrolling area.
元素滚动区域的大小，可读写。
兼容性：IE5.5+, FF3.0+, Saf 4.0+, Chome4+

scrollWidth & scrollHeight

The width/height of an element, including padding.
包含padding值的元素宽高。
兼容性：IE8+, FF3.0+, Saf4.0+, Chrome4+

clientTop & clientLeft

The width of the top/left border of an element.
元素的上/左边距的宽度。
兼容性：IE5.5+, FF3.0+, Saf 4.0+, Chome4+

clientWidth & clientHeight

The width/height of an element, including padding.
与scrollWidth/scrollHeight返回值相同。
兼容性：IE5.5+, FF3.0+, Saf 4.0+, Chome4+

offsetParent

The nearest ancestor that has a position other than static.
最近的一个祖先元素，其position属性值不是static。用来计算offsetLeft和offsetTop的值。

offsetTop & offsetLeft

The vertical/horizontal offset position of an element, relative to offsetParent.
offsetTop/offsetLeft = the top/left position, margin of the element + the top/left padding, scrollbar and border of the offsetParent element.
元素垂直/水平方向距离其祖先元素的长度。

offsetWidth & offsetHeight

The width/height of an element, including padding, border and scrollbar.
元素的宽/高，包括padding大小，border大小和scrollbar的大小。