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HTMLHelp Forums _ Client-side Scripting _ Can I modify what 'input type="file"' displays

Posted by: REJKID Sep 26 2018, 05:29 AM

Is there any way I can specify regular expression of what 'input type="file"' dialog box shows. What I mean by that is that I would like 'input type="file"' to display only the files that their names do match my regular expression and nothing else (e.g. 'Beacon_Suite_V1_0_10_(20180926).mot')
Is this possible?

Kind Regards,

Posted by: Christian J Sep 26 2018, 11:41 AM

I don't think that's possible, for security reasons.

Actually the ACCEPT attribute might be used for this, at least with file extensions. See

Posted by: REJKID Sep 27 2018, 06:06 PM

ACCEPT is only for file extension, I need a regular expression filter. I though pattern would be OK, but it works only for input types: text, date, search, url, tel, email, and password but not for file.

Kind Regards,

Posted by: Christian J Sep 28 2018, 05:17 AM

Here's a javascript property that reveals the file name, but only after the file has already been selected: but I suppose you want the prefiltering done before the user selectes anything...

Posted by: REJKID Oct 7 2018, 07:01 PM

Yep. I need pre-filtering done before the user selects anything. Thanks for the suggestion anyway.
Kind Regards,

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