OnChange (handleChange func)

[arensade]

Hi, I'm curious what is exactly handleChange in example page

When we remove on:change={handleChange} still getting changes on submit function.

[dlebech]

If you have bind:value={$form.someValue} on your form field, then the form will still get updated when the field changes.

Therefore, it looks like handleChange is not necessary.

However, handleChange both changes the value of the form field and it runs validation on the field instantly. It requires a name or id field on the form field to work.

When you use bind:value as well as handleChange, I guess the value is technically being updated twice -- once by Svelte and once by the forms lib. As such, you could argue that bind:value={$form.someValue} should be changed to value={$form.someValue in the examples.

[dlebech]

See also this issue which describes the same thing: https://github.com/tjinauyeung/svelte-forms-lib/issues/159#issue-1163956097