next.js/examples/with-pretty-url-routing/pages/index.js

import React from 'react'

export default function IndexPage () {
  return (
    <div>
      <h1>Homepage</h1>
      <form method='GET' action='/greeting'>
        Name: <input name='name' />
        <input type='submit' />
      </form>
    </div>
  )
}