Kevin Powell - Community•17mo ago

preventDefault() not preventing page refresh on form submit in React

I am currently building a form and somehow the page refreshes when the form is submitted, even though I call preventDefault() in onSubmit. Here is a minified version of my React form component:

import { FormEvent } from 'react';

function ContactForm() {
  function sendEmail(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();

    // send email logic
  }

  return (
    <form
      onSubmit={sendEmail}
    >
      <!-- input fields -->
      <button
        type="submit"
      >
        Submit
      </button>
    </form>

import { FormEvent } from 'react';

function ContactForm() {
  function sendEmail(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();

    // send email logic
  }

  return (
    <form
      onSubmit={sendEmail}
    >
      <!-- input fields -->
      <button
        type="submit"
      >
        Submit
      </button>
    </form>

Help is much appreciated! 🙂

4 Replies

vince•17mo ago

I've never used FormEvents but I know with regular html forms in React the way you're doing it should work. You have the sendEmail function on the form element, and you're calling e.preventDefault(). Problem might lie in FormEvent's functionality. I would look into that specifically and see if you can find anything about preventing default behavior

nickymicky•17mo ago

try onSubmit={(e)=>sendEmail(e)}

LOKKEE•17mo ago

seems like this had actually something to do with the partial hydration of framework islands from Astro. Thank you for your help though! 😊

vince•17mo ago

Interesting! Glad you figured it out

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preventDefault() not preventing page refresh on form submit in React