js gets webpage height (detailed arrangement)_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 height 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 left side of the web page being scrolled: 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
Width of screen resolution: window.screen.width
Screen available work area height: window.screen.availHeight
Screen available work area width: window.screen.availWidth

Copy code The code is as follows:

<script> <br>function getInfo() <br> { <br>var s = ""; <br>s = "The width of the visible area of ​​the web page:" document.body.clientWidth; <br>s = "The height of the visible area of ​​the web page:" document.body.clientHeight; <br>s = "The width of the visible area of ​​the web page: " document.body.offsetWidth " (including the width of the edges and scroll bars)"; <br>s = " The height of the visible area of ​​the web page: " document.body.offsetHeight " (including the width of the edges)" ; <br>s = "The width of the full text of the web page:" document.body.scrollWidth; <br>s = "The height of the full text of the web page:" document.body.scrollHeight; <br>s = "The height of the scrolled web page ( ff): " document.body.scrollTop; <br>s = " The height to which the webpage is scrolled (ie): " document.documentElement.scrollTop; <br>s = " The left side to which the webpage is scrolled: " document.body .scrollLeft; <br>s = "Top text part of the web page:" window.screenTop; <br>s = "Left part of the text part of the web page:" window.screenLeft; <br>s = "High screen resolution:" window. screen.height; <br>s = "Screen resolution width:" window.screen.width; <br>s = "Screen available workspace height:" window.screen.availHeight; <br>s = "Screen available Workspace width: " window.screen.availWidth; <br>s = " Your screen setting is " window.screen.colorDepth " bit color "; <br>s = " Your screen setting is " window.screen.deviceXDPI " Pixels/inch"; <br>//alert (s); <br>} <br>getInfo(); <br></script>

In my local test:
You can use
document.body.clientWidth
document.body.clientHeight
to get it under IE, FireFox, and Opera. It is very simple and convenient. .
In company projects:
Opera still uses
document.body.clientWidth
document.body.clientHeight
but IE and FireFox use
document.documentElement.clientWidth
document.documentElement.clientHeight
It turns out that the W3C standard is causing trouble


If you add this line of tags to the page
in IE:
document.body.clientWidth ==> BODY object width
document.body.clientHeight ==>gt; 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 (i.e. BODY object width Plus Margin width)
document.documentElement.clientHeight ==> Page object height (that is, BODY object height plus Margin height)
And if the W3C standard is not defined, then
IE is 0 ==> 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)
Opera is
:
document.documentElement.clientWidth ==> Page object width (i.e., BODY object width plus Margin width) document.documentElement.clientHeight ==>; Page object height (i.e., BODY object height plus Margin height) It’s really a troublesome thing. In fact, from a development perspective, it would be much more convenient to have fewer objects and methods and not use the latest standards. Sometimes you need to get the bottom of the page, you will use document.body.clientHeight. In the HTML standard (this sentence can get the height of the entire page, no matter how high the actual content of the body is, for example, 1074* With a resolution of 768, when the page is maximized, the height is about 720. Even if there is only one sentence "hello world" on the page, it will still be 720.
But in XHTML, if there is only one line in the body, then document. body.clientHeight can only get the height of that row, about 20px. If you want to get the height of the entire page, you have to use document.documentElement.clientHeight.
The reason is: in HTML, body is The root of the entire DOM, but in XHTML, document is the root, and body is no longer the root, so when you get the attributes of the body, you can no longer get the value of the entire page.
Difference between the old and new standards The lines are
:


The former indicates that the page uses the old standard, and the latter indicates that the page uses the new standard .

Summary:
Use document.documentElement.clientHeight in XHTML instead of



Copy code

The code is as follows:

document.body.clientHeight