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How can I know that the page is zoomed in and out?

Source: Internet
Author: User
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There is a complaint that the page is changed. When asked, the page is zoomed accidentally. In this case, it is best to give a prompt to the user. I wrote a demo for detecting zoom in IE and Firefox:

<! Doctype HTML public "-// W3C // dtd html 4.0 transitional // en"> <HTML> <body> <Div id = "output"> </div> <script language = "JavaScript"> (function () {window. onresize = testzoom; VaR _ screenoriginalwidth = Window. screen. width Function testzoom () {If (window. screen. width <_ screenoriginalwidth) {document. getelementbyid ("output "). innerhtml = "<br> zoom in";} If (window. screen. width> _ screenoriginalwidth) {document. getelementbyid ("output "). innerhtml = "<br> zoom out";} _ screenoriginalwidth = Window. screen. width }}) () </SCRIPT> </body>

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