Illustration of properties such as offsetWidth, clientWidth, scrollWidth, scrollTop, scrollLeft, etc.
 Note 1: The entire background in the above picture is the full size of this webpage, and the small box in the middle is the visible size in the browser. This picture is an explanation of the height, width, top, and left of the document.  Note 2: The second picture mainly explains the attribute values of a div in a web page. "DIV element client area" is the visible area of this div element, and "scroll area" is the original size of the div content. However, since the height and width set by the div's CSS cannot accommodate its content, a scroll bar appears. Here is an even more confusing one, which is widely circulated on the Internet:  |
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