Validation is not triggered with oninput and value props in Svelte 5

[rayrw]

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Description

While it does work when using bind:value in an input tag, validation is not triggered when manually mutating the value via an oninput handler (oninput={e => $form.field = e.currentTarget.value }).

If applicable, a MRE

I've made a minimal reproduction repo. When inputting values in text fields with oninput + value props, the validation is not triggered, but it works when using the text fields with bind:value.

https://sveltelab.dev/github.com/rayrw/svelte5-superforms-proxy-field (right click to open in a new tab)

[ciscoheat]

Since the validation is triggered on blur the first time, you need an extra event handler for validating it manually. Something like:

onblur={() => validate('email')}

(validate is available on the superForm object)