React lets you build user interfaces out of individual pieces called components. Create your own React components like Thumbnail, LikeButton, and Video. Then combine them into entire screens, pages, and apps.
How to reproduce it
function submitAction(e: React.FormEventHandler<HTMLFormElement>) {
e.preventDefault();
...
}
<form onSubmit={submitAction}>
...
</form>
Error
Property 'preventDefault' does not exist on type 'FormEventHandler<HTMLFormElement>'
Solution
Use FormEvent instead of FormEventHandler.
function submitAction(e: React.FormEvent<HTMLFormElement>) {
e.preventDefault();
...
}
<form onSubmit={submitAction}>
...
</form>