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I have a webform, in which I have file upload.

However, when user chooses no file, he is still able to click upload and nothing happens. I would like to have there similar message like when he chooses file with extension which is not allowed. How can I achieve this?

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  • You can use jquery for custom validations. when user will click that button popup one error message.
    – Suraj
    Aug 24, 2016 at 13:26

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You could use the client side validaiton module install it then configure it for webforms , you could also use the module's hooks to customise error messages or create custom error handling functions client side validation

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  • I have no clue, how to use that to achieve my goal. I tried to use hook_file_validate, but apparently, it doesn't go within that hook, when you don't attach file
    – rukya
    Aug 19, 2016 at 9:38
  • @rukya, Can u please mention the code which u have written to validate for file upload??
    – Suraj
    Aug 24, 2016 at 13:21

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