Can you explain how to create a custom Shopify app?

/in /by

Absolutely! Creating a custom Shopify app involves several steps, from setting up your development environment to deploying the app and connecting it to your Shopify store. Here’s a step-by-step overview to get you started:

Prerequisites

Before you begin, make sure you have:

  • A Shopify Partner account

  • A development store (created through your Partner dashboard)

  • Basic knowledge of Node.js, React, or Ruby on Rails (depending on your tech stack)

  • Installed:

Step-by-Step Guide to Create a Custom Shopify App

1. Login to Shopify CLI

bash
shopify login

2. Create a New App

You can choose between Node.js or Ruby. For example, with Node.js:

bash
shopify app create node

Follow the prompts (app name, organization, etc.).

3. Navigate into Your App Directory

bash
cd your-app-name

4. Start the Local Development Server

bash
shopify app dev

This will:

  • Start your local server

  • Open a Ngrok tunnel

  • Prompt you to install the app on your development store

5. Edit Your App Code

The default app includes:

  • A React front end (using Vite or Next.js)

  • An Express backend (for handling Shopify Admin API and Webhooks)

Update the code in:

  • web/frontend/ (React front-end)

  • web/index.js or web/server.js (Express server)

6. Add Functionality

Use Shopify Admin API or GraphQL to interact with the store, such as:

  • Reading products

  • Creating orders

  • Handling webhooks

  • Modifying settings

Install the @shopify/shopify-api and @shopify/shopify-app-express packages for working with the API.

7. Test and Debug

  • Use console.log() or debugging tools.

  • Check Shopify’s App Bridge for UI components.

  • Test webhooks using the Shopify CLI or Ngrok endpoints.

Deploy the App

Once you’re ready to deploy:

1. Host the App

Use services like:

  • Render

  • Vercel

  • Heroku

  • AWS

2. Set Environment Variables

Secure your SHOPIFY_API_KEY, SHOPIFY_API_SECRET, and SCOPES.

3. Submit the App (optional)

If you’re building a public app (not custom for a single store), you’ll need to submit it for review on the Shopify App Store.

Optional Features to Add

  • Webhooks (to respond to store events)

  • Admin interface (using Polaris)

  • App settings page

  • Billing API for paid features