Async validations

[LeoIannacone]

This allows always to validate fields with async functions.

[aesopwolf]

We probably won't merge anything in using Promise for awhile. Browser support is definitely getting better but IE still doesn't provide support. See #70 for a previous discussion.

[coleturner]

Async validation is a critical use case for me and I'm sure it would open up the potential for formsy-react to be used for a wider variety of validations. One example is checking for username uniqueness on a registration form.

The impression I get from formsy-react is that the best UX is having validations prior to submit, and indicating whether a form is valid by enabling the submit button. The only option as it stands is to validate on submit which is alarming because it negates that principle and the only other option is to roll your own.

Is there an ETA on when some form of asynchronous validation will be released?

Thanks!

[aesopwolf]

Have you looked into updateInputsWithError(errors)? I have a feeling that might solve your use case.

[LeoIannacone]

We are actually using this implementation in production. Looks working very well, what you have to do is just have a "global Promise" object.
We are using: https://polyfill.io/v2/docs/

A simple async validation should return the Promise.

[logemann]

This has never made it into the distro? Thats really unfortunate. I would need that badly.

[Semigradsky]

@SpadarShut this repo in unmaintained, see https://github.com/formsy/formsy-react/

[SpadarShut]

@Semigradsky thanks, I know. I was fixing that just for our corporate fork.