It is not possible to access files on a person's computer using Javascript through a Web browser, or to read the properties of files. It would be a serious security and privacy hazard if Javascript code in a Web page could read files on your computer because the information could be sent back to the site via a form or other mechanisms. For these reasons the possibility of file access was excluded when the Javascript language was designed.
Other client side solutions such as ActiveX and Java applets require special security consent from the user, which many people are reluctant to grant, and only make the job more complicated and risky from their point of view. Not all Web browsers are configured to support ActiveX or Java.
The only effective way to check the size of a file for upload is on the server side. Your server side form handler must process the file and this is the best place to apply a limit to the number of bytes you will accept.
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1 Answers for "Using Javascript, Can I get the file size on the client side? " Sort by: Most Recent Top Rated. Prev1NextShowing 1 - 1 of 1 ...
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Using Javascript, Can I get the file size on the client side?17 Sep 2009 ...

Code Style: Javascript frequently asked questions (FAQ)Q: Can I get the file size on the client side? A: It is not possible to access files on a person's computer using Javascript through a Web browser, ...
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