Detailed explanation of JavaScript web page positioning_javascript skills

Width of the visible area of ​​the web page: document.body.clientWidth
Height of the visible area of ​​the web page: document.body.clientHeight
Width of the visible area of ​​the web page: document.body.offsetWidth (including the width of the edges)
Visible of the web page Area height: document.body.offsetHeight (including the width of the edge)
Full text width of the web page body: document.body.scrollWidth
Full text height of the web page body: document.body.scrollHeight
Height of the web page being scrolled: document.body.scrollTop
The scrolled left side of the web page: document.body.scrollLeft
The top part of the main body of the web page: window.screenTop
The left side of the main body part of the web page: window.screenLeft
The high screen resolution : window.screen.height
The width of the screen resolution: window.screen.width
Screen available work area height: window.screen.availHeight
Screen available work area width: window.screen.availWidth

HTML precise positioning: scrollLeft, scrollWidth, clientWidth, offsetWidth
scrollHeight: Get the scroll height of the object.
scrollLeft: Sets or gets the distance between the left edge of the object and the leftmost end of the currently visible content in the window
scrollTop: Sets or gets the distance between the topmost edge of the object and the topmost end of the visible content in the window
scrollWidth: Get the scroll width of the object
offsetHeight: Get the height of the object relative to the layout or the parent coordinate specified by the offsetParent property
offsetLeft: Get the height of the object relative to the layout or the parent coordinate specified by the offsetParent property Calculate the left position
offsetTop: Get the calculated top position of the object relative to the layout or the parent coordinate specified by the offsetTop attribute
event.clientX The horizontal coordinate relative to the document
event.clientY The vertical coordinate relative to the document
event.offsetX is the horizontal coordinate relative to the container
event.offsetY is the vertical coordinate relative to the container
document.documentElement.scrollTop is the value of vertical scrolling
event.clientX document.documentElement.scrollTop is relative to the horizontal position of the document The amount of coordinate scrolling in the vertical direction

The differences between IE and FireFox are as follows:

IE6.0, FF1.06:

clientWidth = width padding

clientHeight = height padding

offsetWidth = width padding border

offsetHeight = height padding border

IE5.0/5.5:
clientWidth = width - border

clientHeight = height - border

offsetWidth = width

offsetHeight = height

(It needs to be mentioned: the margin attribute in CSS has nothing to do with clientWidth, offsetWidth, clientHeight, and offsetHeight)

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Yesterday, I changed the layout of some pages in the project. After the change, I found that some js did not work. The page width obtained through a statement like document.documentElement.clientWidth is 0. After some googling, I found out that the new page lacked a reference to the W3C standard, causing document.documentElement.clientWidth to become invalid:

If you add this line of tags to the page

In IE:
document.body.clientWidth ==> BODY object width
document.body.clientHeight ==> BODY object height
document.documentElement. clientWidth ==> Visible area width
document.documentElement.clientHeight ==> Visible area height

In FireFox :
document.body.clientWidth ==> ; BODY object width
document.body.clientHeight ==> BODY object height
document.documentElement.clientWidth ==> Visible area width
document.documentElement.clientHeight ==> Visible area height

In Opera:
document.body.clientWidth ==> Visible area width
document.body.clientHeight ==> Visible area height
document.documentElement. clientWidth ==> Page object width (that is, BODY object width plus Margin width)
document.documentElement.clientHeight ==>gt; Page object height (that is, BODY object height plus Margin height)
And if it is not defined W3C standards, then

IE is:
document.documentElement.clientWidth ==> 0
document.documentElement.clientHeight ==> 0

FireFox is:
document.documentElement.clientWidth ==> Page object width (i.e., BODY object width plus Margin width) document.documentElement.clientHeight ==>gt; Page object height (i.e., BODY object height plus Margin height)

Opera is:
document.documentElement.clientWidth ==> page object width (that is, BODY object width plus Margin width) document.documentElement.clientHeight ==> page Object height (that is, BODY object height plus Margin height)