In this article, we will learn about how to validate the basic form using remix, in the Shopify remix app.
Form validation is a crucial aspect of web development that ensures the data submitted by users meets specific criteria before being processed. With Remix, a modern framework for building React applications, you can handle form validation efficiently.
This guide walks you through implementing form validation for a simple signup form in Remix. Here, we focus on capturing the fundamentals to help you understand the essential elements of form validation in Remix, including actions, action data, and rendering errors.
Contents
Validating forms is essential for several reasons:
import { Form } from "@remix-run/react"; export default function Signup() { return ( <Form method="post"> <p> <input type="email" name="email" /> </p> <p> <input type="password" name="password" /> </p> <button type="submit">Sign Up</button> </Form> ); }
import { json, redirect } from "@remix-run/node"; // or cloudflare/deno import { Form } from "@remix-run/react"; export default function Signup() { // omitted for brevity } export async function action({ request, }) { const formData = await request.formData(); const email = String(formData.get("email")); const password = String(formData.get("password")); const errors = {}; if (!email.includes("@")) { errors.email = "Invalid email address"; } if (password.length < 12) { errors.password = "Password should be at least 12 characters"; } if (Object.keys(errors).length > 0) { return json({ errors }); } // Redirect to dashboard if validation is successful return redirect("/dashboard"); }
import { json, redirect } from "@remix-run/node"; import { Form, useActionData } from "@remix-run/react"; export async function action({ request, }) { const formData = await request.formData(); const email = String(formData.get("email")); const password = String(formData.get("password")); const errors = {}; if (!email.includes("@")) { errors.email = "Invalid email address"; } if (password.length < 12) { errors.password = "Password should be at least 12 characters"; } if (Object.keys(errors).length > 0) { return json({ errors }); } return redirect("/dashboard"); } export default function Signup() { const actionData = useActionData(); return ( <Form method="post"> <p> <input type="email" name="email" /> {actionData?.errors?.email ? ( <em>{actionData?.errors.email}</em> ) : null} </p> <p> <input type="password" name="password" /> {actionData?.errors?.password ? ( <em>{actionData?.errors.password}</em> ) : null} </p> <button type="submit">Sign Up</button> </Form> ); }
And there you have it! You’ve successfully set up a basic form validation flow in Remix. The beauty of this approach is that the errors will automatically displayed based on the action data, and they will be updated each time the user re-submits the form. This reduces the amount of boilerplate code you have to write, making your development process more efficient.
Happy Coding!
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