JS code interpretation for obtaining page window size_javascript skills

The code in this section mainly uses some properties of the Document object regarding the window. The main functions and usage of these properties are as follows.
To get the size of the window, different properties and methods need to be used for different browsers: to detect the real size of the window, you need to use the properties of the Window under Netscape; under IE you need to go deep inside the Document to perform the body Detection; In the DOM environment, if you want to get the size of the window, you need to pay attention to the size of the root element , not the

element.
The innerWidth property of the Window object contains the inner width of the current window. The innerHeight property of the Window object contains the inner height of the current window.
The body attribute of the Document object corresponds to the tag of the HTML document. The documentElement property of the Document object represents the root node of the HTML document.
document.body.clientHeight represents the current height of the window where the HTML document is located. document.body.clientWidth represents the current width of the window where the HTML document is located.

Copy code The code is as follows:

BR>"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> www.w3.org/1999/xhtml">

Please resize the browser window

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The actual height of the browser window:

The actual width of the browser window:

After running the program, two text boxes appear on the page, showing the current width and height of the window respectively. When the browser window is resized, the value in the text box will change accordingly, which is the size of the window at different times.
Source program interpretation
(1) The program first creates a form containing two text boxes to display the current width and height of the window, and their values ​​will change as the window size changes.
(2) In the subsequent JavaScript code, two variables winWidth and winHeight are first defined to save the height and width values ​​of the window.
(3) Then, in the function findDimensions (), use window.innerHeight and window.innerWidth to get the height and width of the window, and save them in the two aforementioned variables.
(4) Then detect the body by going deep inside the Document, obtain the window size, and store it in the two variables mentioned above.
(5) At the end of the function, by accessing the form elements by name, the results are output to two text boxes.
(6) At the end of the JavaScript code, complete the entire operation by calling the findDimensions () function.