How To Initiate A Redirect From A Shopify Checkout Validation App

Topic summary

A developer has successfully created a Shopify checkout validation app following official documentation, but encounters a limitation with error handling.

Current Issue:

  • Validation errors display messages as expected
  • Developer wants to redirect customers to the cart page instead of showing error messages
  • Multiple hours spent attempting to implement redirect functionality without success

Technical Context:

  • Using Shopify’s cart-checkout validation extension
  • Code includes error handling that targets “cart” but only displays localized messages
  • The TODO comment in code indicates redirect intention, but implementation method unclear

Response:
Shopify support directed the developer to external resources, as direct Functions support isn’t provided in the forum. Suggested checking the Shopify/function-examples GitHub repository and its active discussion board for potential solutions.

Status: Unresolved - developer seeking guidance on redirect implementation method.

Summarized with AI on November 21. AI used: claude-sonnet-4-5-20250929.

Hello, I have followed the below tutorial and created a Shopify checkout validation app.

https://shopify.dev/docs/apps/checkout/validation/cart-checkout

Everything is working as expected, however, if the validation fails, instead of showing a message, I would like to redirect the customer to the cart page.

How would I go about acheiving this,

Please see simplified version of my code below:

extensions/cart-checkout-validation/src/index.js

// @ts-check
// Use JSDoc annotations for type safety
/**
 * @typedef {import("../generated/api").InputQuery} InputQuery
 * @typedef {import("../generated/api").FunctionResult} FunctionResult
 */
// The @shopify/shopify_function package will use the default export as your function entrypoint
export default
/**
 * @param {InputQuery} input
 * @returns {FunctionResult}
 */

(input) => {

    // The error
    const error = {
        localizedMessage:
            "This is a example message",
        target: "cart"
    };

    const errors = [];
    errors.push(error);

   if (true) {
     // TODO: Redirect customer to cart page
   }

    return {errors};
};

The error is showing as expected, but I would instead like to initiate a redirect.

I have been at this for hours with no success. Any help would be greatly appreciated.

Hi @SoapMatt ,

While we don’t currently provide direct support for Functions in this forum, the public [Shopify/function-examples GitHub repository] has an active [discussion board] that might be worth checking out.

Hope you have a great day