JSFiddle - React, Tailwind, and code Playground

by Alexander Branchugov

HTML

<form method="post">

<input name="a">
<input name="b">

<input type="submit" value="submit">
</form>

JavaScript

let formData = new FormData()

formData.append('a', 'ss')

fetch('/', { method: 'POST', data: formData } )