[Feature request] input[type="file"]

[wujekbogdan]

Is there any chance to implement file input validation using FormData()? It's supported by all major browsers (and IE>=10): http://caniuse.com/#search=FormData

[marcandre]

Ok, IIC, you want to add a remote validation to an input of type=file, and that won't work currently because our ajax call uses something like data: {input_name: input_value}, right?

So I think it would be nice to support type=file too. Since we aim to support IE8/9 too, we should issue a warning in those cases, and continue using the basic data form unless it's a file.

Any chance you'd be able to provide a PR for this?

[wujekbogdan]

No, not a remote validator. Regular front-end validation using FormData()

I know that FormData works only in modern browsers, and there's no reasonable polyfill for IE<10. So maybe it would be better to deliver it as a plugin (an additional validator) not as a core feature?

Here's an example of max file size valiadtor: http://jsfiddle.net/milz/pfn8fwn3/1/
This example works for Parsley 1.x

Implementing this feature in 2.x version is tricky because it's not possible to get the reference to DOM object in the callback function of window.Parsley.addValidator method.

Correct me if I'm wrong.

[marcandre]

I'm glad to report that it is easy to validate this in 2.2, since the arguments passed to the validators are: value, requirement, parsleyInstance. From the parsley instance, you have access to $element.

[wujekbogdan]

Thank you. I was using an older version.

Thanks to this feature I was able to create a code sample for basic file[type=input] validation:
https://jsfiddle.net/02vjbLrs/14/

[marcandre]

I've added this to our custom validator example