Do you have any possibility to check for a field to be pristine/touched?

[ckpinguin]

Somehow it should be possible to only check validation, if field is touched or onBlur (switch to the next field)?

[gaperton]

Create your own <Input /> tag which behaves like this. This is the normal way of handling such a situation in the way needed for you.

For the start copy Input implementation from tags.jsx. Then change the way how it handles the validation error which is enclosed in the link. There is no magic at all, the creation of your own controls is straightforward:

https://github.com/Volicon/NestedLink/blob/master/tags.jsx#L35

Your Input must know whenever it's focused or touched and suppress displaying the validation error if it's not. Probably, you will need to add the local state to it to make it remember such a thing.

[gaperton]

You're supposed to create your own controls wrapping all necessary styles and handling error formatting, in the way that your forms will be defined with the semantic markup. That's an overall idea and links makes it practically possible. tags.jsx is just an example and the starting boilerplate.

That's how it is done in userslist example:

const ValidatedInput = ( props ) => (
    <div>
        <Input { ...props } />
        <div className="validation-error">
            { props.valueLink.error || '' }
        </div>
    </div>
);

https://github.com/Volicon/NestedLink/blob/master/example/src/userslist.jsx#L150

You need to do the same thing but use raw <input/> and add the local state to make it remember whenever it was touched. That's it.

[ckpinguin]

OK, thanks I'll try it :-) Yesterday I „solved“ it using onBlur={() => this.setState({titleTouched: true})} but having more local state in a subcomponent did not feel right.

[gaperton]

Yesterday I „solved“ it using onBlur={() => this.setState({titleTouched: true})} but having more local state in a subcomponent did not feel right.

It is okay. You need to hide this local state in <Input/> itself once and forget about it. This state is entirely private and there is no reason to expose it outside.