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Native javascript implements DIV dragging and calculation of repeated areas_javascript skills

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Release： 2016-05-16 16:22:31
Original
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Copy code The code is as follows:

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


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The code is as above, but I feel the efficiency is a bit low. Do you guys have any optimization plans? Please let me know. Thank you very much
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