DEV Community

Cover image for Building an ecommerce store using Medusa and Sveltekit
Mark Munyaka
Mark Munyaka

Posted on • Edited on

Building an ecommerce store using Medusa and Sveltekit

#stripe #ecommerce #sveltekit #medusajs

Medusa is an open source tool that can help you set up a headless ecommerce server backend with relative ease. Couple that with Sveltekit, a frontend framework for building web apps. What do you get? A full stack, modular ecommerce app that can support a wide range of use cases.

Introduction

What is this tutorial for?

This tutorial will teach you how to set up a simple ecommerce web app using Medusa as your store backend and Sveltekit for the visual storefront. It will showcase the fundamental building blocks required to run the app in development and production stages as well as showcase how you can deploy the app. At the end of this tutorial you should have acquired the overarching knowledge necessary in building ecommerce apps of a composable nature.

Why Medusa?

Medusa is one of the few open source ecommerce backend that is feature rich allowing developers to make all sorts of ecommerce apps to fit any use case. Medusa is also gaining popularity within the developer community such that it worth taking a look at how you can make an ecommerce app using Medusa. Furthermore, Medusa supports all sorts of ecommerce app architectures. Be it headless, composable, semi-modular you name it, all scenarios work well with Medusa.

Why Sveltekit?

Sveltekit is a framework based on the popular JavaScript library called Svelte. It has also gained a lot of popularity in the frontend community in the past few years. It is simple to understand, it is fast and performant and a useful alternative to the React ecosystem.

Prerequisites

To follow along with the tutorial you need to have some knowledge of the following:

  • Basic understanding of HTML, CSS, and JavaScript
  • Basic understanding of Node.js and npm
  • Basic understanding of the command line (Bash)
  • Knowledge of Svelte and Sveltekit is a bonus but not a requirement.
  • Knowledge of Medusa is a bonus but not a requirement.

In addition to knowing these tools, your computer system should have the following packages installed:

Before proceeding with the tutorial you can check out the following links for useful resources:

Installation and setup of the Medusa server API

In this step you will install and set up the Medusa Server backend.

Open up your terminal and create a project folder to contain all the source code for the entire project. Name it medusa-sveltekit.



mkdir medusa-sveltekit
Enter fullscreen mode Exit fullscreen mode

Set up PostgreSQL on Neon

If you have PostgreSQL installed locally, you can skip this step.

Visit the Neon - Sign Up page and create a new account.

Create a new project in the Neon console. Give your project a name like mystore and your database a name like storedb then click Create project.

Take note of your connection string which will look something like: postgresql://dominggobana:JyyuEdr809p@df-hidden-bonus-ertd7sio.us-east-3.aws.neon.tech/storedb?sslmode=require. It is in the form postgres://[user]:[password]@[host]/[dbname].You will provide connection string as a database URL to your Medusa server.

Install Medusa CLI

In your terminal, inside the my-store folder run the following command to install the Medusa CLI. We will use it to install the Medusa server.



npm install @medusajs/medusa-cli -g
Enter fullscreen mode Exit fullscreen mode

Create a new Medusa project 



medusa new my-medusa-store
Enter fullscreen mode Exit fullscreen mode

You will be asked to specify your PostgreSQL database credentials. Choose "Skip database setup".

A new directory named my-medusa-store will be created to store the server files.

Configure Database - Neon Users

If you have PostgreSQL installed locally, you can skip this step.

Add the connection string as the DATABASE_URL to your environment variables. Inside my-medusa-store create a .env file and add the following:



DATABASE_URL=postgresql://dominggobana:JyyuEdr809p@df-hidden-bonus-ertd7sio.us-east-3.aws.neon.tech/mystoredb?sslmode=require
Enter fullscreen mode Exit fullscreen mode

Configure Database - Local PostgreSQL DB

If you have PostgreSQL configured on Neon, you can skip this step.

Access the PostgreSQL console to create a new user and database for the Medusa server.



sudo -u postgres psql
Enter fullscreen mode Exit fullscreen mode

To create a new user named medusa_admin run this command:



CREATE USER medusa_admin WITH PASSWORD 'medusa_admin_password';
Enter fullscreen mode Exit fullscreen mode

Now, create a new database named medusa_db and make medusa_admin the owner.



CREATE DATABASE medusa_db OWNER medusa_admin;
Enter fullscreen mode Exit fullscreen mode

Last, grant all privileges to medusa_admin and exit the PostgreSQL console.



GRANT ALL PRIVILEGES ON DATABASE medusa_db TO medusa_admin;
Enter fullscreen mode Exit fullscreen mode 


exit
Enter fullscreen mode Exit fullscreen mode

Add the connection string as the DATABASE_URL to your environment variables. Inside my-medusa-store create a .env file and add the following:



DATABASE_URL=postgres://medusa_admin:medusa_admin_password@localhost:5432/medusa_db
Enter fullscreen mode Exit fullscreen mode

Seed Database

Run migrations and seed data to the database by running the following command:



cd my-medusa-store
medusa seed --seed-file="./data/seed.json"
Enter fullscreen mode Exit fullscreen mode

Start your Medusa backend 



medusa develop
Enter fullscreen mode Exit fullscreen mode

The Medusa server will start running on port 9000.

Test your server:



curl localhost:9000/store/products
Enter fullscreen mode Exit fullscreen mode

If it is working, you should see a list of products.

Install and Serve Medusa Admin with the Backend

This section explains how to install the admin to be served with the Medusa Backend.

Install the package

Inside my-medusa-store stop your Medusa server, CTRL + C and run the following command to install the Medusa Admin Dashboard.



npm install @medusajs/admin
Enter fullscreen mode Exit fullscreen mode

Test your install by re-running your server.



medusa develop
Enter fullscreen mode Exit fullscreen mode

Open up your browser and visit localhost:7001 to see the Medusa Admin Dashboard. Use the Email admin@medusa-test.com and password supersecret to log in.

Medusa Admin Dashboard

Set Up Sveltekit

Create a Sveltekit project

Open up a new terminal session inside the medusa-sveltekit directory. Run the following commands:



npm create svelte@latest storefront
cd storefront
npm install
Enter fullscreen mode Exit fullscreen mode

Answer the prompts as follows:

  • Which Svelte app template?, Answer: Skeleton project (Barebones scaffolding for your new SvelteKit app)
  • Add type checking with TypeScript?, Answer: No
  • Select additional options (use arrow keys/space bar) Leave it blank.

This will scaffold a new project in the storefront directory.

Link Storefront To Server

Configure SvelteKit Storefront URL

To link the Medusa server with the Sveltekit storefront, first, open up your Medusa project, my-medusa-store in your code editor, then open the .env file where all your environment variables are set up.

Add the variable STORE_CORS with the value of the URL where your storefront will be running. SvelteKit by default runs on port 5173.



STORE_CORS=http://localhost:5173
Enter fullscreen mode Exit fullscreen mode

After this, your Medusa server will be ready to receive a request from your storefront and send back responses if everything works as expected.

List Products on Sveltekit Storefront

Open up the storefront directory in your code editor, and create a new file named src/routes/+page.js. This file will export a load function and the return value which is available to the page via the data prop:



/** @type {import(./$types').PageLoad} */
export async function load({ fetch }) {
    const res = await fetch(`http://localhost:9000/store/products`);
    const payload = await res.json();
    return { payload };
}
Enter fullscreen mode Exit fullscreen mode

Replace the existing code in src/routes/+page.svelte with the following:



<script>
  /** @type {import('./$types').PageData} */
  export let data;
</script>

<h1>Welcome to the Medusa SvelteKit Store</h1>
<h2>Products</h2>
<ul>
    {#each data.payload.products as product}
        <li>{product.title} - ${product.variants[0].prices[0].amount}</li>
    {/each}
</ul>
Enter fullscreen mode Exit fullscreen mode

Open up the storefront directory in your terminal and start the SvelteKit development server.



npm run dev
Enter fullscreen mode Exit fullscreen mode

Visit localhost:5173 in your browser to see the list of products from your Medusa backend.

Storefront with list of products

Add Cart

Update src/routes/+page.svelte with the following code, to create a cart on page load:



<script>
  /** @type {import('./$types').PageData} */
  export let data;

  import { onMount } from 'svelte';

    onMount(async () => {
        fetch(`http://localhost:9000/store/carts`, {
        method: "POST",
        credentials: "include",
    })
    .then((response) => response.json())
    .then(({ cart }) => {
        localStorage.setItem("cart_id", cart.id)
        console.log("The cart ID is " + localStorage.getItem("cart_id"));
    });

    });
</script>

<h1>Welcome to the Medusa SvelteKit Store</h1>
<h2>Products</h2>
<ul>
    {#each data.payload.products as product}
        <li>{product.title} - ${product.variants[0].prices[0].amount}</li>
    {/each}
</ul>
Enter fullscreen mode Exit fullscreen mode

Revisit localhost:5173 in your browser and open the Console section of your Dev Tools. You should see a message with a cart ID to confirm creation of the cart.

Confirmation of Cart Creation

Update each product in src/routes/+page.svelte with a button to add a product to the cart.



<script>
  /** @type {import('./$types').PageData} */
  export let data;

  import { onMount } from 'svelte';

    onMount(async () => {
        fetch(`http://localhost:9000/store/carts`, {
        method: "POST",
        credentials: "include",
    })
    .then((response) => response.json())
    .then(({ cart }) => {
        localStorage.setItem("cart_id", cart.id)
        console.log("The cart ID is " + localStorage.getItem("cart_id"));
    });

    });

  function addProductToCart(variant_id) {
    const id = localStorage.getItem("cart_id");
    fetch(`http://localhost:9000/store/carts/${id}/line-items`, {
        method: "POST",
        dentials: "include",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            variant_id,
            quantity: 1,
        }),
    })
        .then((response) => response.json());
        //.then(({ cart }) => setCart(cart));
  }
</script>

<h1>Welcome to the Medusa SvelteKit Store</h1>
<h2>Products</h2>
<ul>
    {#each data.payload.products as product}
        <li>
            {product.title} - ${product.variants[0].prices[0].amount}
            <button on:click={() => { 
                  addProductToCart(product.variants[0].id); 
                  alert('Added to Cart');
                  }}
            >
                Add To Cart
            </button>
        </li>
    {/each}
</ul>
Enter fullscreen mode Exit fullscreen mode

Confirm whether the products are being added to the cart by performing a curl request as follows:



curl localhost:9000/store/carts/cart_01HRBTB0X79NAGJYY8T6D5BGK6
Enter fullscreen mode Exit fullscreen mode

Replace with the specific cart id as listed in your browser console. If all is working your cart should be populated with some products.

The next step is to display the cart by creating a cart page.

Create a new folder inside src/routes named cart. Add a +page.svelte file to the cart folder.

Add the following code to src/routes/cart/+page.svelte:



<script>
    import { onMount } from "svelte";

    let data;
    let total;
    let items = [];

    onMount(async () => {
        const id = localStorage.getItem("cart_id");
        const res = await fetch(`http://localhost:9000/store/carts/${id}`, {
            credentials: "include",
        });
        data = await res.json();
        items = data.cart.items;
        total = data.cart.total;
    });
</script>

<h1>Welcome to the Medusa SvelteKit Store</h1>
<h2>Cart</h2>

<ul>
    {#each items as item}
        <li>
            TITLE: {item.title} PRICE: {item.unit_price} QUANTITY: {item.quantity}
        </li>
    {/each}
</ul>
<p>The total price for your cart is {total}</p>
Enter fullscreen mode Exit fullscreen mode

Test your cart page by adding some products to your cart then visiting localhost:5173/cart in your browser. You should see a list of products with the quantity and price info as well as the cart total.

Cart Page

Next, associate your cart with an email address for the user. This is necessary to complete the cart.



<script>
    import { onMount } from "svelte";

    let data;
    let email;
    let total;
    let items = [];

    onMount(async () => {
        const id = localStorage.getItem("cart_id");
        const res = await fetch(`http://localhost:9000/store/carts/${id}`, {
            credentials: "include",
        });
        data = await res.json();
        items = data.cart.items;
        total = data.cart.total;
    });

    function addCustomer() {
        const id = localStorage.getItem("cart_id");
        fetch(`http://localhost:9000/store/carts/${id}`, {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json",
            },
            body: JSON.stringify({
                email: email,
            }),
        })
        .then((response) => response.json())
        .then(({ cart }) => {
            console.log("Customer ID is " + cart.customer_id)
            console.log("Customer email is " + cart.email)
        });
    }
</script>

<h1>Welcome to the Medusa SvelteKit Store</h1>
<h2>Cart</h2>

<ul>
    {#each items as item}
        <li>
            TITLE: {item.title} PRICE: {item.unit_price} QUANTITY: {item.quantity}
        </li>
    {/each}
</ul>
<p>The total price for your cart is {total}</p>
<p>Enter your email to Proceed to Checkout</p>
<input id="email" type="email" bind:value={email}>
<button type="submit" on:click={() => {
    addCustomer();
    alert('Added your Email');
    }}
>
    Submit
</button>
Enter fullscreen mode Exit fullscreen mode

Add Checkout Functionality

Create a page called, src/routes/checkout/+page.svelte to load the checkout page.

Add the following code to initialize the payment session:



<script>
    import { onMount } from "svelte";

    onMount(async () => {
        const id = localStorage.getItem("cart_id");
        fetch(`http://localhost:9000/store/carts/${id}/payment-sessions`, {
            method: "POST",
            credentials: "include",
        })
        .then((response) => response.json())
        .then(({ cart }) => {
            console.log(cart.payment_sessions)
        })
    });
</script>

<h1>Welcome to the Medusa SvelteKit Store</h1>
<h2>Checkout</h2>
Enter fullscreen mode Exit fullscreen mode

Visit localhost:5173/checkout in your browser and open up the Console in your Devtools.

Init Payment Session

Add Cart Completion

Next add Cart completion to the checkout process, by adding the following code:



medusa.carts.createPaymentSessions(cartId)
.then(({ cart }) => {
  console.log(cart.payment_sessions)
})
Enter fullscreen mode Exit fullscreen mode 


<script>
import { onMount } from "svelte";

    onMount(async () => {
        const id = localStorage.getItem("cart_id");
        fetch(`http://localhost:9000/store/carts/${id}/payment-sessions`, {
            method: "POST",
            credentials: "include",
        })
        .then((response) => response.json())
        .then(({ cart }) => {
            console.log(cart.payment_sessions)
        })
    });

function completeCart() {
    const id = localStorage.getItem("cart_id");
    fetch(`http://localhost:9000/store/carts/${id}/complete`, {
        method: "POST",
        dentials: "include",
        headers: {
            "Content-Type": "application/json",
        },
    })
    .then((response) => response.json())
    .then(({ type, data }) => {
        console.log(type, data)
    })
  }
</script>

<h1>Welcome to the Medusa SvelteKit Store</h1>
<h2>Checkout</h2>

<button on:click={() => { 
        completeCart(); 
        alert('Cart Complete');
        }}
>
    Complete Cart
</button>
Enter fullscreen mode Exit fullscreen mode

Click on the Complete Cart button to test if the order was completed using the manual Medusa payment provider. You should see the following:

Order Complete

Add Payment Provider

Stripe is a battle-tested and unified platform for transaction handling. Stripe supplies you with the technical components needed to handle transactions safely and all the analytical features necessary to gain insight into your sales. These features are also available in a safe test environment which allows for a concern-free development process.

Using the medusa-payment-stripe plugin, you will set up your Medusa project with Stripe as a payment processor.

Create a Stripe account and retrieve the Stripe Secret API Key from your account to connect Medusa to your Stripe account.

Stripe Secret key

Add the key to your environment variables in .env in my-medusa-store.



STRIPE_API_KEY=sk_...
Enter fullscreen mode Exit fullscreen mode

Install Stripe Plugin

Open up your terminal, in the root of your Medusa backend. Stop your Medusa server and run the following command to install the Stripe plugin:



npm install medusa-payment-stripe
Enter fullscreen mode Exit fullscreen mode

Configure the Stripe Plugin

Next, you need to add configurations for your Stripe plugin.

In medusa-config.js, add the following at the end of the plugins array:



const plugins = [
  // ...
  {
    resolve: `medusa-payment-stripe`,
    options: {
      api_key: process.env.STRIPE_API_KEY,
    },
  },
]
Enter fullscreen mode Exit fullscreen mode

Add Stripe to Region in Medusa Admin

Make sure your Medusa backend server is running, then log in to your Medusa Admin Dashboard.

Medusa Admin Dashboard - Home Page

Go to Settings then select Regions.

Medusa Settings - Select Regions

Select a region to edit.

Medusa Regions Page

Click on the three dots icon at the top right of the first section on the right. Click on Edit Region Details from the dropdown.

Under the providers section, add all Stripe options to the region. Unselect the payment providers you want to remove from the region. Click the "Save and close" button.

Add Stripe to Region

Add Stripe Key to Sveltekit Storefront

Add your Stripe Publishable API Key to your Sveltekit storefront environment variables. Open up .env in your Sveltekit Storefront and add the following:



PUBLIC_STRIPE_KEY=<YOUR_PUBLISHABLE_KEY>
Enter fullscreen mode Exit fullscreen mode

Install Dependencies

Install the necessary dependencies to show the UI and handle the payment confirmation:



npm install --save stripe @stripe/stripe-js svelte-stripe
Enter fullscreen mode Exit fullscreen mode

You’ll also use Medusa’s JS Client to easily call Medusa’s REST APIs:



npm install @medusajs/medusa-js
Enter fullscreen mode Exit fullscreen mode

Add Stripe

Update the checkout page for the Stripe payment option. Open up src/routes/checkout/+page.svelte in your code editor.



<script>
  import { onMount } from 'svelte';
  import { loadStripe } from '@stripe/stripe-js';
  import { PUBLIC_STRIPE_KEY } from '$env/static/public';
  import { Elements, PaymentElement, LinkAuthenticationElement, Address } from 'svelte-stripe';
  import Medusa from '@medusajs/medusa-js';

  let stripe = null;
  let clientSecret = null;
  let error = null;
  let elements;
  let processing = false;

  let cartId = null;

  onMount(async () => {
    stripe = await loadStripe(PUBLIC_STRIPE_KEY);
    const client = new Medusa();
    cartId = localStorage.getItem("cart_id");

    try {
      const { cart } = await client.carts.createPaymentSessions(cartId);
      const isStripeAvailable = cart.payment_sessions?.some(
        (session) => session.provider_id === 'stripe'
      );

      if (!isStripeAvailable) return;

      const { cart: updatedCart } = await client.carts.setPaymentSession(cartId, {
        provider_id: 'stripe',
      });

      setClientSecret(updatedCart.payment_session.data.client_secret);
    } catch (error) {
      console.error('Error creating payment session:', error);
    }
  });

  function setClientSecret(secret) {
    clientSecret = secret;
  }

  async function submit() {
    // avoid processing duplicates
    if (processing) return

    processing = true

    // confirm payment with stripe
    const result = await stripe.confirmPayment({
      elements,
      redirect: 'if_required'
    })

    // log results, for debugging
    console.log({ result })

    if (result.error) {
      // payment failed, notify user
      error = result.error
      processing = false
    } else {
      // payment succeeded, redirect to "thank you" page
      const client = new Medusa();
      const response = await client.carts.complete(cartId);
      console.log(response);
    }
  }
</script>

<h1>Welcome to the Medusa SvelteKit Store</h1>
<h2>Checkout</h2>

{#if error}
  <p class="error">{error.message} Please try again.</p>
{/if}

{#if clientSecret}
  <Elements
    {stripe}
    {clientSecret}
    theme="flat"
    labels="floating"
    variables={{ colorPrimary: '#7c4dff' }}
    rules={{ '.Input': { border: 'solid 1px #0002' } }}
    bind:elements
  >
    <form on:submit|preventDefault={submit}>
      <LinkAuthenticationElement />
      <PaymentElement />
      <Address mode="billing" />

      <button disabled={processing}>
        {#if processing}
          Processing...
        {:else}
          Pay
        {/if}
      </button>
    </form>
  </Elements>
{:else}
  Loading...
{/if}

<style>
  .error {
    color: tomato;
    margin: 2rem 0 0;
  }

  form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 2rem 0;
  }

  button {
    padding: 1rem;
    border-radius: 5px;
    border: solid 1px #ccc;
    color: white;
    background: #7c4dff;
    font-size: 1.2rem;
    margin: 1rem 0;
  }
</style>
Enter fullscreen mode Exit fullscreen mode

Add Success Page

Create a new directory named thanks in the src/routes path. In it add a +page.svelte file with the following code:



<h1>Success!</h1>
<p>Payment was successfully processed.</p>
Enter fullscreen mode Exit fullscreen mode

Update src/routes/checkout/+page.svelte so that once the payment is done the store will redirect to the Success page:



<script>
  import { goto } from '$app/navigation';
  import { onMount } from 'svelte';
  import { loadStripe } from '@stripe/stripe-js';
  import { PUBLIC_STRIPE_KEY } from '$env/static/public';
  import { Elements, PaymentElement } from 'svelte-stripe';
  import Medusa from '@medusajs/medusa-js';

  let stripe = null;
  let clientSecret = null;
  let error = null;
  let elements;
  let processing = false;

  let cartId = null;

  onMount(async () => {
    stripe = await loadStripe(PUBLIC_STRIPE_KEY);
    const client = new Medusa();
    cartId = localStorage.getItem("cart_id");

    try {
      const { cart } = await client.carts.createPaymentSessions(cartId);
      const isStripeAvailable = cart.payment_sessions?.some(
        (session) => session.provider_id === 'stripe'
      );

      if (!isStripeAvailable) return;

      const { cart: updatedCart } = await client.carts.setPaymentSession(cartId, {
        provider_id: 'stripe',
      });

      setClientSecret(updatedCart.payment_session.data.client_secret);
    } catch (error) {
      console.error('Error creating payment session:', error);
    }
  });

  function setClientSecret(secret) {
    clientSecret = secret;
  }

  async function submit() {
    // avoid processing duplicates
    if (processing) return

    processing = true

    // confirm payment with stripe
    const result = await stripe.confirmPayment({
      elements,
      redirect: 'if_required'
    })

    // log results, for debugging
    console.log({ result })

    if (result.error) {
      // payment failed, notify user
      error = result.error
      processing = false
    } else {
      // payment succeeded, redirect to "thank you" page
      const client = new Medusa();
      const response = await client.carts.complete(cartId);
      console.log(response);
      goto('../thanks')
    }
  }
</script>

<h1>Welcome to the Medusa SvelteKit Store</h1>
<h2>Checkout</h2>

{#if error}
  <p class="error">{error.message} Please try again.</p>
{/if}

{#if clientSecret}
  <Elements
    {stripe}
    {clientSecret}
    theme="flat"
    labels="floating"
    variables={{ colorPrimary: '#000' }}
    rules={{ '.Input': { border: 'solid 1px #000' } }}
    bind:elements
  >
    <form on:submit|preventDefault={submit}>
      <PaymentElement />

      <button disabled={processing}>
        {#if processing}
          Processing...
        {:else}
          Pay
        {/if}
      </button>
    </form>
  </Elements>
{:else}
  Loading...
{/if}

<style>
  .error {
    color: tomato;
    margin: 2rem 0 0;
  }

  form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 2rem 0;
  }

  button {
    padding: 1rem;
    border-radius: 5px;
    border: solid 1px #000;
    color: white;
    background: #000;
    font-size: 1.2rem;
    margin: 1rem 0;
  }
</style>
Enter fullscreen mode Exit fullscreen mode

Test Payment

Test if the Stripe integration has worked well by making test a payment. If everything is working your checkout page should appear like this.

Checkout Page

A successful payment should lead users to the following page:

Success Page

Capture Payment

Visit the Orders section in your Medusa Admin and click on the order you placed earlier in your storefront to capture it.

Capture payment in Medusa Dashboard

You can check to see if the payment was successful in your Stripe Dashboard Payment Section, after capturing it in your Medusa Dashboard.

Successful payment in Stripe Dashboard

UI Design

In the next section, we will design the UI for our storefront.

Add Layout

Add a layout file for the common UI elements like the header and footer. Open up your storefront folder and add a src/routes/+layout.svelte file inside.

Add the following code to src/routes/+layout.svelte:



<div class="pagewrapper">
    <header id="header">
        <a href="/">HOME</a>
        <h1><a href="/">MY STORE</a></h1>
        <a href="/cart">CART</a>
    </header>
    <main id="main">
      <slot />
    </main>
    <footer id="footer">
        <p>Copyright 2024.</p>
        <p>Made Using Sveltekit and Medusa</p>
    </footer>
</div>

<style>
  * {
      margin: 0;
      padding: 0;
  }

  .pagewrapper {
      max-width: 1440px;
      font-family: Inter, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica Neue, Ubuntu, sans-serif;
      margin: 0 auto;
  }

  header {
      padding: 0.6rem 1.2rem;
      display: flex;
      justify-content: space-between;
      text-align: center;
      align-items: center;
      border-bottom: 1px solid #000;
  }

  a {
      list-style: none;
      text-decoration: none;
      color: inherit;
  }

  footer {
      font-size: 0.6rem;
      display: flex;
      justify-content: space-between;
      margin-top: 2rem;
      padding: 0.75rem 1.5rem;
      border-top: 1px solid #000;
  }
  </style>
Enter fullscreen mode Exit fullscreen mode

Home Page

We will start off with the home page design. The home page will be based on the following design.

Home Page Design

Update the code for the home page, src/routes/+page.svelte as follows:



<script>
  /** @type {import('./$types').PageData} */
  export let data;

  import { onMount } from "svelte";

  onMount(async () => {
    fetch(`http://localhost:9000/store/carts`, {
      method: "POST",
      credentials: "include",
    })
      .then((response) => response.json())
      .then(({ cart }) => {
        localStorage.setItem("cart_id", cart.id);
        console.log("The cart ID is " + localStorage.getItem("cart_id"));
      });
  });

  function addProductToCart(variant_id) {
    const id = localStorage.getItem("cart_id");
    fetch(`http://localhost:9000/store/carts/${id}/line-items`, {
      method: "POST",
      dentials: "include",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        variant_id,
        quantity: 1,
      }),
    }).then((response) => response.json());
    //.then(({ cart }) => setCart(cart));
  }
</script>

<section id="hero">
  <h2>Welcome to the Medusa SvelteKit Store</h2>
  <a href="#products">View Products</a>
</section>

<section id="products">
  <h3>Products</h3>
  <ul>
    {#each data.payload.products as product}
      <li>
        <img src="{product.thumbnail}" alt="">
        <h4>{product.title}</h4>
        <p>${ (product.variants[0].prices[1].amount / 100).toFixed(2) }</p>
        <button
          on:click={() => {
            addProductToCart(product.variants[0].id);
            alert("Added to Cart");
          }}
        >
          Add To Cart
        </button>
      </li>
    {/each}
  </ul>
</section>

<style>
  #hero {
    border-bottom: 1px #000000 solid;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    height: 100vh;
  }

  #products {
    padding: 2rem 0;
  }

  ul, li, a {
    list-style: none;
    text-decoration: none;
    color: inherit;
  }

  ul {
    display: grid;
    text-align: center;
    justify-items: center;
    grid-template-columns: repeat(3, 1fr);
    padding: 1.2rem;
    gap: 2rem;
  }

  @media (max-width: 768px) {
    ul {
        grid-template-columns: repeat(2, 1fr);
        padding: 1rem;
        gap: 1.6rem;
    }
 } 

 @media (max-width: 480px) {
    ul {
        grid-template-columns: repeat(1, 1fr);
        padding: 0.8rem;
        gap: 3rem;      
    }
 }

  li {
    max-width: 18rem;
    padding: 1.2rem 0;
  }

  img {
    width: 100%;
  }

  h3 {
    text-align: center;
    padding: 2rem 0;
  }

  button {
    text-decoration: none;
    background: #000;
    color: #FFF;
    width: 100%;
    font-family: inherit;
    padding: 0.5rem 0;
    cursor: pointer;
    border: none;
  }

  button:hover {
    font-weight: 600;
  }
</style>
Enter fullscreen mode Exit fullscreen mode

Make sure your Medusa development server and Sveltekit development server are running and then visit the home page, localhost:5173 to view the changes.

Updated Storefront Home Page with styling

Cart Page

Update the code for the cart page, src/routes/cart/+page.svelte as follows:



<script>
    import { onMount } from "svelte";

    let data;
    let email;
    let total;
    let items = [];

    onMount(async () => {
        const id = localStorage.getItem("cart_id");
        const res = await fetch(`http://localhost:9000/store/carts/${id}`, {
            credentials: "include",
        });
        data = await res.json();
        items = data.cart.items;
        total = data.cart.total;
    });

    function addCustomer() {
        const id = localStorage.getItem("cart_id");
        fetch(`http://localhost:9000/store/carts/${id}`, {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json",
            },
            body: JSON.stringify({
                email: email,
            }),
        })
            .then((response) => response.json())
            .then(({ cart }) => {
                console.log("Customer ID is " + cart.customer_id);
                console.log("Customer email is " + cart.email);
            });
    }
</script>

<h2>Cart</h2>
<section id="cart">
    <table>
        <thead>
            <tr>
                <th>Item</th>
                <th>Quantity</th>
                <th>Price</th>
                <th>Total</th>
            </tr>
        </thead>
        <tbody>
            {#each items as item}
                <tr>
                    <td>{item.title}</td>
                    <td>{item.quantity}</td>
                    <td>${(item.unit_price / 100).toFixed(2)}</td>
                    <td>${(item.total / 100).toFixed(2)} </td>
                </tr>
            {/each}
        </tbody>
    </table>
</section>
<section id="summary">
    <h4>SUMMARY</h4>
    <ul>
        <li>
            <p>Subtotal</p>
            <p>${(total / 100).toFixed(2)}</p>
        </li>
        <li>
            <p>Shipping</p>
            <p>$0.00</p>
        </li>
        <li>
            <p>Taxes</p>
            <p>$0.00</p>
        </li>
        <li id="total">
            <p>Total</p>
            <p>${(total / 100).toFixed(2)}</p>
        </li>
    </ul>
    <p>Enter your email to proceed to Checkout</p>
    <input id="email" type="email" bind:value={email} />
    <button
        type="submit"
        on:click={() => {
            addCustomer();
            alert("Added your Email");
        }}
    >
        Submit
    </button>

    <a href="/checkout">Go To Checkout</a>
</section>

<style>
    * {
        margin: 0;
        padding: 0;
    }

    h2 {
        text-align: center;
        padding: 4rem 0 2rem 0;
        font-size: 4rem;
    }

    table {
        margin: 0 auto;
        table-layout: fixed;
        border-collapse: collapse;
        max-width: 16rem;
    }

    thead {
        border-bottom: 1px #000 solid;
    }

    tbody td {
        font-weight: 400;
        text-align: left;
    }

    thead th {
        text-align: left;
    }

    th,
    td {
        padding: 1.2rem;
    }

    @media (max-width: 420px) {
        th,
        td {
            padding: 1.2rem 0.8rem;
        }
    }

    #cart {
        padding: 2rem 0;
    }

    #summary {
        max-width: 16rem;
        margin: 0 auto;
        padding: 2rem 0;
    }

    #summary h4 {
        text-align: center;
        border-bottom: 1px #000 solid;
        font-size: 2rem;
        padding: 1rem;
    }

    #summary li {
        display: flex;
        justify-content: space-between;
        font-weight: 400;
        padding: 1rem 0;
    }

    #summary #total {
        border-top: 1px #000 solid;
        font-weight: 600;
        font-size: 1.2rem;
    }

    #summary a {
        display: block;
        text-decoration: none;
        width: 100%;
        background: #000;
        padding: 0.3rem 0;
        color: #fff;
        text-align: center;
        margin-top: 4rem;
    }

    #summary a:hover {
        font-weight: 600;
    }

    ul ~ p {
        padding-top: 1rem;
        font-weight: 400;
        text-align: justify;
    }

    input {
        width: 98%;
        margin: 0.5rem 0;
        padding: 0.4rem 0;
        padding-left: 0.2rem;
        border: 1px #000 solid;
    }

    button {
        text-decoration: none;
        background: #000;
        color: #fff;
        width: 100%;
        font-family: inherit;
        padding: 0.3rem 0;
        font-size: 1rem;
        cursor: pointer;
        border: none;
    }

    button:hover {
        font-weight: 600;
    }
</style>
Enter fullscreen mode Exit fullscreen mode

Make sure your Medusa development server and Sveltekit development server are running and then add some products to your cart. Visit the cart page, localhost:5173/cart to view the changes.

Updated Storefront Cart Page with styling

Checkout Page

Update the code for the checkout page, src/routes/checkout/+page.svelte as follows:



<script>
  import { goto } from '$app/navigation';
  import { onMount } from 'svelte';
  import { loadStripe } from '@stripe/stripe-js';
  import { PUBLIC_STRIPE_KEY } from '$env/static/public';
  import { Elements, PaymentElement } from 'svelte-stripe';
  import Medusa from '@medusajs/medusa-js';

  let stripe = null;
  let clientSecret = null;
  let error = null;
  let elements;
  let processing = false;

  let cartId = null;

  onMount(async () => {
    stripe = await loadStripe(PUBLIC_STRIPE_KEY);
    const client = new Medusa();
    cartId = localStorage.getItem("cart_id");

    try {
      const { cart } = await client.carts.createPaymentSessions(cartId);
      const isStripeAvailable = cart.payment_sessions?.some(
        (session) => session.provider_id === 'stripe'
      );

      if (!isStripeAvailable) return;

      const { cart: updatedCart } = await client.carts.setPaymentSession(cartId, {
        provider_id: 'stripe',
      });

      setClientSecret(updatedCart.payment_session.data.client_secret);
    } catch (error) {
      console.error('Error creating payment session:', error);
    }
  });

  function setClientSecret(secret) {
    clientSecret = secret;
  }

  async function submit() {
    // avoid processing duplicates
    if (processing) return

    processing = true

    // confirm payment with stripe
    const result = await stripe.confirmPayment({
      elements,
      redirect: 'if_required'
    })

    // log results, for debugging
    console.log({ result })

    if (result.error) {
      // payment failed, notify user
      error = result.error
      processing = false
    } else {
      // payment succeeded, redirect to "thank you" page
      const client = new Medusa();
      const response = await client.carts.complete(cartId);
      console.log(response);
      goto('../thanks')
    }
  }
</script>

<h2>Checkout</h2>

{#if error}
  <p class="error">{error.message} Please try again.</p>
{/if}

{#if clientSecret}
  <Elements
    {stripe}
    {clientSecret}
    variables={{ colorPrimary: '#000' }}
    rules={{ '.Input': { border: 'solid 1px #000' } }}
    bind:elements
  >
    <form on:submit|preventDefault={submit}>
      <PaymentElement />

      <button disabled={processing}>
        {#if processing}
          Processing...
        {:else}
          Pay
        {/if}
      </button>
    </form>
  </Elements>
{:else}
  Loading...
{/if}

<style>
  h2 {
    padding: 4rem 0 2rem 0;
    text-align: center;
    font-size: 3rem;
  }

  .error {
    color: tomato;
    margin: 2rem 0 0;
  }

  form {
    max-width: 24rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 0 auto;
  }

  button {
    padding: 0.5rem 0;
    border: solid 1px #000;
    color: #FFF;
    background: #000;
    font-size: 1rem;
    margin: 1rem 0;
    font-family: inherit;
  }

  button:hover {
    font-weight: 600;
    cursor: pointer;
  }
</style>
Enter fullscreen mode Exit fullscreen mode

Complete your cart by clicking on Proceed to Checkout button and visit the checkout page, localhost:5173/checkout to view the changes.

Updated Storefront Checkout Page with styling

Success Page

Make a payment using the Stripe Test card 4242 4242 4242 4242 and this will lead to the success page.



<h2>Success!</h2>
<section id="success">
    <p>Payment was successfully processed.</p>
</section>


<style>
    h2 {
        text-align: center;
        font-size: 3rem;
        padding: 4rem 0 2rem 0;
    }

    #success {
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 8rem;
        max-width: 24rem;
        padding: 0 0.5rem;
    }

    p {
        text-align: center;
    }
</style>
Enter fullscreen mode Exit fullscreen mode

Updated Storefront Success Page with Styling

Update Storefront Environment Variables

In this step you will replace the hardcoded URL to the Medusa backend with an environment variable, MEDUSA_BACKEND_URL in all your storefront files. This will be useful when deploying the storefront in the next steps.

Open up .env in your Sveltekit Storefront and and add the following:



PUBLIC_MEDUSA_BACKEND_URL=http://localhost:9000
Enter fullscreen mode Exit fullscreen mode

Open up all the files in your storefront project folder where the URL to the Medusa backend is hardcoded. Add the following import statement at the top of each file:



<script>
import { PUBLIC_MEDUSA_BACKEND_URL } from '$env/static/public';
//...
Enter fullscreen mode Exit fullscreen mode

Replace every occurence of http://localhost:9000 with PUBLIC_MEDUSA_BACKEND_URL. The files are src/routes/+page.js, src/routes/+page.svelte, src/routes/cart/+page.svelte, and src/routes/checkout/+page.svelte.

The following is the updated src/routes/+page.js:



import { MEDUSA_BACKEND_URL } from '$env/static/public'

/** @type {import(./$types').PageLoad} */
export async function load({ fetch }) {
    const res = await fetch(`${PUBLIC_MEDUSA_BACKEND_URL}/store/products`);
    const payload = await res.json();
    return { payload };
}
Enter fullscreen mode Exit fullscreen mode

The updated src/routes/+page.svelte will be as follows:



<script>
  /** @type {import('./$types').PageData} */
  export let data;

  import { onMount } from "svelte";
  import { PUBLIC_MEDUSA_BACKEND_URL } from '$env/static/public';

  onMount(async () => {
    fetch(`${PUBLIC_MEDUSA_BACKEND_URL}/store/carts`, {
      method: "POST",
      credentials: "include",
    })
      .then((response) => response.json())
      .then(({ cart }) => {
        localStorage.setItem("cart_id", cart.id);
        console.log("The cart ID is " + localStorage.getItem("cart_id"));
      });
  });

  function addProductToCart(variant_id) {
    const id = localStorage.getItem("cart_id");
    fetch(`${PUBLIC_MEDUSA_BACKEND_URL}/store/carts/${id}/line-items`, {
      method: "POST",
      dentials: "include",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        variant_id,
        quantity: 1,
      }),
    }).then((response) => response.json());
    //.then(({ cart }) => setCart(cart));
  }
</script>
<!--...-->
Enter fullscreen mode Exit fullscreen mode

The updated src/routes/cart/+page.svelte will be as follows:



<script>
    import { onMount } from "svelte";
    import { PUBLIC_MEDUSA_BACKEND_URL } from '$env/static/public';

    let data;
    let email;
    let total;
    let items = [];

    onMount(async () => {
        const id = localStorage.getItem("cart_id");
        const res = await fetch(`${PUBLIC_MEDUSA_BACKEND_URL}/store/carts/${id}`, {
            credentials: "include",
        });
        data = await res.json();
        items = data.cart.items;
        total = data.cart.total;
    });

    function addCustomer() {
        const id = localStorage.getItem("cart_id");
        fetch(`${PUBLIC_MEDUSA_BACKEND_URL}/store/carts/${id}`, {
            method: "POST",
            credentials: "include",
            headers: {
                "Content-Type": "application/json",
            },
            body: JSON.stringify({
                email: email,
            }),
        })
            .then((response) => response.json())
            .then(({ cart }) => {
                console.log("Customer ID is " + cart.customer_id);
                console.log("Customer email is " + cart.email);
            });
    }
</script>
<!--...-->
Enter fullscreen mode Exit fullscreen mode

The following is the updated src/routes/checkout/+page.svelte:



<script>
  import { goto } from '$app/navigation';
  import { onMount } from 'svelte';
  import { loadStripe } from '@stripe/stripe-js';
  import { PUBLIC_STRIPE_KEY } from '$env/static/public';
  import { PUBLIC_MEDUSA_BACKEND_URL } from '$env/static/public';
  import { Elements, PaymentElement } from 'svelte-stripe';
  import Medusa from '@medusajs/medusa-js';

  let stripe = null;
  let clientSecret = null;
  let error = null;
  let elements;
  let processing = false;

  let cartId = null;

  onMount(async () => {
    stripe = await loadStripe(PUBLIC_STRIPE_KEY);
    const client = new Medusa({ baseUrl: PUBLIC_MEDUSA_BACKEND_URL, maxRetries: 3 });
    cartId = localStorage.getItem("cart_id");

    try {
      const { cart } = await client.carts.createPaymentSessions(cartId);
      const isStripeAvailable = cart.payment_sessions?.some(
        (session) => session.provider_id === 'stripe'
      );

      if (!isStripeAvailable) return;

      const { cart: updatedCart } = await client.carts.setPaymentSession(cartId, {
        provider_id: 'stripe',
      });

      setClientSecret(updatedCart.payment_session.data.client_secret);
    } catch (error) {
      console.error('Error creating payment session:', error);
    }
  });

  function setClientSecret(secret) {
    clientSecret = secret;
  }

  async function submit() {
    // avoid processing duplicates
    if (processing) return

    processing = true

    // confirm payment with stripe
    const result = await stripe.confirmPayment({
      elements,
      redirect: 'if_required'
    })

    // log results, for debugging
    console.log({ result })

    if (result.error) {
      // payment failed, notify user
      error = result.error
      processing = false
    } else {
      // payment succeeded, redirect to "thank you" page
      const client = new Medusa({ baseUrl: PUBLIC_MEDUSA_BACKEND_URL, maxRetries: 3 });
      const response = await client.carts.complete(cartId);
      console.log(response);
      goto('../thanks')
    }
  }
</script>

<!--...-->
Enter fullscreen mode Exit fullscreen mode

Deployment

In this section, we will look into the deployment of the ecommerce app. We will start off with the deployment of the Medusa Server and Admin then look into the deployment of the Sveltekit storefront.

Deploy Medusa Server

We will deploy the Medusa Backend Server on Railway. Railway provides a free trial (no credit card required) that allows you to deploy your Medusa backend along with PostgreSQL and Redis databases. This is useful mainly for development and demo purposes. Sign up for a Railway account and proceed with the following steps.

Create GitHub Repo

Navigate to the Medusa server directory my-medusa-store in your local machine. Duplicate the folder and create a new GitHub repo based on this directory to handle all the config related to the server only.

Add Railway Configuration File

To avoid errors during the installation process, it's recommended to use yarn for installing the dependencies. Alternatively, pass the --legacy-peer-deps option to the npm command.

Add in the root of your Medusa server project the file, railway.toml, with the content based on the package manager of your choice:

Using yarn:



[build]
builder = "NIXPACKS"

[build.nixpacksPlan.phases.setup]
nixPkgs = ["nodejs", "yarn"]

[build.nixpacksPlan.phases.install]
cmds=["yarn install"]
Enter fullscreen mode Exit fullscreen mode

Using npm:



[build]
builder = "NIXPACKS"

[build.nixpacksPlan.phases.setup]
nixPkgs = ["nodejs", "npm"]

[build.nixpacksPlan.phases.install]
cmds=["npm install --legacy-peer-deps"]
Enter fullscreen mode Exit fullscreen mode

Configure Server for Production

Open the medusa-config.js file in your new server repo.

Update the following parts to enable caching using Redis.

Uncomment the inner part of the following section:



const modules = {
  /*eventBus:
    resolve: "@medusajs/event-bus-redis",
Enter fullscreen mode Exit fullscreen mode

Uncomment the following section as well:



  // Uncomment the following lines to enable REDIS
  // redis_url: REDIS_URL
Enter fullscreen mode Exit fullscreen mode

It then becomes:



//...
const modules = {
  eventBus: {
    resolve: "@medusajs/event-bus-redis",
    options: {
      redisUrl: REDIS_URL
    }
  },
  cacheService: {
    resolve: "@medusajs/cache-redis",
    options: {
      redisUrl: REDIS_URL
    }
  },
};

/** @type {import('@medusajs/medusa').ConfigModule["projectConfig"]} */
const projectConfig = {
  jwtSecret: process.env.JWT_SECRET,
  cookieSecret: process.env.COOKIE_SECRET,
  store_cors: STORE_CORS,
  database_url: DATABASE_URL,
  admin_cors: ADMIN_CORS,
  redis_url: REDIS_URL
};
//...
Enter fullscreen mode Exit fullscreen mode

Since we are deploying the admin separately, disable the admin plugin's serve option.



const plugins = [
  // ...
  {
    resolve: "@medusajs/admin",
    /** @type {import('@medusajs/admin').PluginOptions} */
    options: {
      // only enable `serve` in development
      // you may need to add the NODE_ENV variable
      // manually
      serve: process.env.NODE_ENV === "development",
      // other options...
      autoRebuild: true,
      develop: {
        open: process.env.OPEN_BROWSER !== "false",
      },
    },
  },
]
Enter fullscreen mode Exit fullscreen mode

This ensures that the admin isn't built or served in production. You can also change @medusajs/admin dependency to be a devdependency in package.json.

Also, change the build command to remove the command that builds the admin inside the package.json file:



"scripts": {
  // ...
  "build": "cross-env npm run clean && npm run build:server",
}
//...
"devDependencies": {
  //...
  "@medusajs/admin": "^7.1.11",
}
Enter fullscreen mode Exit fullscreen mode

Commit your changes, and push them to your remote GitHub repository. Once your repository is ready on GitHub, log in to your Railway dashboard.

Create Project + PostgreSQL Database

If you are using Neon for your PostgreSQL database please skip this step.

On the Railway Dashboard, click on the New Project button and choose from the list the Deploy PostgreSQL option.

New PostgreSQL Railway

A new database will be created and, after a few seconds, you'll be redirected to the project page where you'll see the newly-created database.

New Project Page Railway

Migrate local PostgreSQL database to Railway

If you are using Neon for your PostgreSQL database please skip this step.

Open your terminal and run the following command to dump the local database to file:



pg_dump medusa_db > medusa_db.sql
Enter fullscreen mode Exit fullscreen mode

Copy the DATABASE_URL from your Railway Dashboard. Then export the database dump, medusa_db.sql into the new database on the remote Railway server:



psql DATABASE_URL < medusa_db.sql
Enter fullscreen mode Exit fullscreen mode

Replace DATABASE_URL with the value from your Railway Dashboard.

Create the Redis Database

In the same project view, click on the Create button, choose the Database option and select Add Redis.

Add Redis to Railway

A new Redis database will be added to the project view in a few seconds. Click on it to open the database sidebar.

Railway Project with Redis

Deploy Medusa in Server Mode

In this section, you'll create a Medusa backend instance running in server runtime mode.

In the same project view, click on the Create button and choose the GitHub Repo option. If you still haven't given GitHub permissions to Railway, choose the Configure GitHub App option.

Add GitHub Repo to Railway Project

Choose the repository from the GitHub Repo dropdown.

GitHub Repo Added to Railway Project

Configure Backend Environment Variables

To configure the environment variables of your Medusa backend, click on the GitHub repo card and choose the Variables tab and add the following environment variables:



PORT=9000
JWT_SECRET=something
COOKIE_SECRET=something
DATABASE_URL=${{Postgres.DATABASE_URL}}
REDIS_URL=${{Redis.REDIS_URL}}
STORE_CORS=http://localhost:5173
ADMIN_CORS=http://localhost:7001
STRIPE_API_KEY=sk_test_XXXXXXXXXXXX
Enter fullscreen mode Exit fullscreen mode

Notice that the values of DATABASE_URL and REDIS_URL reference the values from the PostgreSQL and Redis databases you created earlier.

For Neon users, insert the URL to your Postgres database hosted on Neon as the value to DATABASE_URL.

NOTE

The values for STORE_CORS and ADMIN_CORS will be updated after deploying the admin and storefront.
Use strong, randomly generated secrets for JWT_SECRET and COOKIE_SECRET.

Add Environment Variables to Railway

Change Backend's Start Command

The start command is the command used to run the backend. You’ll change it to run any available migrations, then run the Medusa backend. This way if you create your own migrations or update the Medusa backend, it's guaranteed that these migrations run first before the backend starts.

Click on the GitHub repository's card, select the Settings tab and scroll down to the Deploy section. Click on the Start command button and paste the following command:



medusa migrations run && medusa start
Enter fullscreen mode Exit fullscreen mode

Change Start command in Railway

Add Domain Name

Click on the Medusa server runtime card and select the Settings tab and scroll down to the Networking section. Either select Custom Domain or select Generate Domain to generate a random button.

Add Domain Name to Railway Project

Deploy Changes

At the top left of your project's dashboard page, there's a Deploy button that deploys all the changes you've made so far.

Railway Deploy button

Click on the button to trigger the deployment. The deployment will take a few minutes before it's ready.

Test the Backend

Once the deployment is finished, you can access the Medusa backend on the custom domain/domain you've generated.

For example, you can open the URL <YOUR_APP_URL>/store/products which returns the products available on your backend.

Railway Deployment Test

Health Route

Access <YOUR_APP_URL>/health to get health status of your deployed backend.

Raliway Deployment Health

Create Admin User

Railway’s CLI tool allows you to run commands locally, but using environment variables from your projects.

To create an admin user in your deployed backend, run the following commands in the root of your Medusa project.

Install the CLI tool as follows:



npm i -g @railway/cli
Enter fullscreen mode Exit fullscreen mode

Login into your Railway account:



railway login --browserless
Enter fullscreen mode Exit fullscreen mode

This will print a URL and a Pairing Code to the Terminal, which you can use to authenticate your CLI session. Follow the instructions to complete the authentication process.

Associate your Medusa server project, environment and service with your current directory:



railway link
Enter fullscreen mode Exit fullscreen mode

Run this to create an admin



railway run npx medusa user --email prodadmin@medusa-test.com --password supersecret
Enter fullscreen mode Exit fullscreen mode

Deploy Medusa Admin

We will deploy the Medusa Admin application on Cloudflare Pages.

Create GitHub Repo

Hosting providers like Cloudflare allow you to deploy your project directly from GitHub. This makes it easier for you to push changes and updates without having to manually trigger the update in the hosting provider.

NOTE:

Even though you are just deploying the admin, you must include the entire Medusa backend project in the deployed repository. The build process of the admin uses many of the backend's repos.

Navigate to the Medusa server directory my-medusa-store of your project folder in your local machine. Duplicate the directory and create a new GitHub repo based on this directory to handle all the config related to the admin only.

Configure Build Command

In the package.json file of your new Medusa Admin repo, add or change the build script for the admin:



"scripts": {
  //other scripts
  "build:admin": "medusa-admin build --deployment",
}
Enter fullscreen mode Exit fullscreen mode

NOTE:

When using --deployment option, the backend's URL is loaded from the MEDUSA_ADMIN_BACKEND_URL environment variable. You will configure this environment variable in a later step.

Preparing Deployment

Log in to your Cloudflare Dashboard and select Workers & Pages.

Cloudflare Dashboard

Select Create application then Pages then Connect to Git.

You will be prompted to sign in with your preferred Git provider.

Next, select the GitHub project for your Medusa Admin repo.

Once you have selected a repository, select Install & Authorize and Begin setup.

Select GitHub repo

You can then customize your deployment in Set up builds and deployments.

Your project name will be used to generate your project's hostname.

Configure Build settings

Set the build command of your deployed project to use the build:admin command:



npm run build:admin
Enter fullscreen mode Exit fullscreen mode

Set the output directory of your deployed project to build.

Add the environment variable MEDUSA_ADMIN_BACKEND_URL and set its value to the URL of your deployed Medusa backend, that is the URL you got in the previous step on Railway.

Cloudflare Set up builds and deployments

Save Configuration and Deploy Admin

After you have finished setting your build configuration, select Save and Deploy. Your project build logs will output as Cloudflare Pages installs your project dependencies, builds the project, and deploys it to Cloudflare’s global network.

When your project has finished deploying, you will receive a unique URL to view your deployed site.

Cloudflare Page Admin URL

Configure CORS on the Deployed Backend

To send requests from the admin dashboard to the Medusa backend, you must set the ADMIN_CORS environment variable on your backend to the admin's URL:



ADMIN_CORS=<ADMIN_URL>
Enter fullscreen mode Exit fullscreen mode

Visit your Railway dashboard click on the GitHub repo card and choose the Variables tab to your deployed Medusa backend web service. Update the ADMIN_CORS environment variable.

Where <ADMIN_URL> is the URL of your admin dashboard that you just deployed on Cloudflare.

Update Admin CORS in Railway

Then, redeploy your Medusa backend. Once the backend is running again, you can use your admin dashboard.

Log into Medusa Admin Dashboard

Visit the URL to your Medusa Admin and log in using the user you created in the previous steps.

Medusa Admin on Cloudflare Pages

If all is working you should be able to log in to your dashboard and see all the orders you made previously when testing the development version of your store.

Medusa Admin Dashboard Logged In

Deploy Storefront

We will deploy the Sveltekit storefront on Cloudflare Pages.

Create GitHub repo

In your local machine, navigate to the folder, storefront containing your Sveltekit storefront source code. Duplicate the directory and create a new GitHub repo based on this directory.

SvelteKit Cloudflare Configuration

To use SvelteKit with Cloudflare Pages, you need to add the Cloudflare adapter to your application.

Install the Cloudflare Adapter in the root of your SvelteKit storefront folder by running:



npm i --save-dev @sveltejs/adapter-cloudflare
Enter fullscreen mode Exit fullscreen mode

Include the adapter in svelte.config.js:



import adapter from '@sveltejs/adapter-cloudflare';

/** @type {import('@sveltejs/kit').Config} */
const config = {
  kit: {
    adapter: adapter(),
  }
};

export default config;
Enter fullscreen mode Exit fullscreen mode

Push the changes you made in your repo to GitHub.

Prepare Deployment via Cloudflare Dashboard

Log in to your Cloudflare Dashboard and select Workers & Pages.

Cloudflare Dashboard

Select Create application then Pages then Connect to Git.

You will be prompted to sign in with your preferred Git provider.

Next, select the GitHub project for your Sveltekit storefront repo.

Once you have selected a repository, select Begin setup.

Select GitHub repo

Configure Build Settings

You can then customize your deployment in Set up builds and deployments.

Your project name will be used to generate your project's hostname.

Select the new GitHub repository that you created and, in Set up builds and deployments, provide the following information:

Configuration Option Value
Production branch main
Framework preset SvelteKit
Build command npm run build
Build directory .svelte-kit/cloudflare

Add the environment variables, PUBLIC_STRIPE_KEY for your Stripe Key and MEDUSA_BACKEND_URL for your Railway Medusa backend server URL.

Cloudflare Storefront Build Config

Optionally, you can customize the Project name field. It defaults to the GitHub repository's name, but it does not need to match. The Project name value is assigned as your *.pages.dev subdomain.

Save Configuration and Deploy Storefront

After completing the configuration, click the Save and Deploy button.

You will see your first deploy pipeline in progress. Pages installs all dependencies and builds the project as specified.

Cloudflare Pages will automatically rebuild your project and deploy it on every new pushed commit.

Additionally, you will have access to preview deployments, which repeat the build-and-deploy process for pull requests. With these, you can preview changes to your project with a real URL before deploying them to production.

When your project has finished deploying, you will receive a unique URL to view your deployed site.

Cloudflare Page Storefront URL

Configure CORS on the Deployed Backend

To send requests from the admin dashboard to the Medusa backend, you must set the STORE_CORS environment variable on your backend to the admin's URL:



STORE_CORS=<STORE_URL>
Enter fullscreen mode Exit fullscreen mode

Visit your Railway dashboard click on the GitHub repo card and choose the Variables tab to your deployed Medusa backend web service. Update the STORE_CORS environment variable.

Where <STORE_URL> is the URL of your Sveltekit storefront that you just deployed on Cloudflare.

Update Store CORS in Railway

Then, redeploy your Medusa backend. Once the backend is running again, you can use your storefront.

Test Storefront

Visit the URL to your storefront in your browser. If all is working your storefront home page should appear with all the products from the Medusa backend.

Sveltekit Storefront on Cloudflare Pages

Conclusion

To conclude, this tutorial has guided you through the process of building a full-stack ecommerce application using Medusa as the backend and Sveltekit for the frontend. You've learned how to:

  1. Set up and configure a Medusa server
  2. Create a Sveltekit storefront and integrate it with the Medusa backend
  3. Implement core ecommerce functionalities like product listing, cart management, and checkout
  4. Add Stripe as a payment provider
  5. Style your storefront for a better user experience
  6. Deploy your Medusa backend on Railway
  7. Deploy your Medusa Admin on Cloudflare Pages
  8. Deploy your Sveltekit storefront on Cloudflare Pages

By following this tutorial, you've gained valuable experience in creating a modern, composable ecommerce solution. The combination of Medusa's powerful backend capabilities and Sveltekit's efficient frontend framework provides a solid foundation for building scalable and customizable online stores.

This project serves as an excellent starting point for further customization and expansion. You can now add more features, optimize performance, and tailor the user interface to meet specific business requirements.

Remember that ecommerce development is an ongoing process, and you should continually update and improve your application based on user feedback and changing market needs. With the knowledge gained from this tutorial, you're well-equipped to tackle more complex ecommerce challenges and create innovative online shopping experiences.

Author

Mark Munyaka

GitHub: @Marktawa

Twitter: @McMunyaka

Hire Me

If you found this guide helpful and would like assistance in setting up your own Medusa-powered ecommerce store, I would be happy to help!
As an experienced Medusa, Sveltekit and, Next.js developer, I can provide the following services:

  • Initial setup and configuration of your Medusa backend
  • Design, setup and configuration of your Sveltekit storefront.
  • If you prefer the Medusa Next.js Starter, I can help set it up as well.
  • Deployment of your Medusa store on AWS, Railway, Digital Ocean and any other platform
  • Integration with Neon Postgres, Stripe, Meilisearch, SendGrid, and other plugins
  • Customization and branding of your store's design and functionality
  • Ongoing maintenance, updates, and feature enhancements
  • Performance optimization and scaling guidance

To discuss your project and get a quote, please feel free to contact me on markmunyakapro@gmail.com or connect with me on LinkedIn or Discord. I look forward to hearing from you!

Sponsor

Support my passion for sharing development knowledge by making a donation to my Buy Me a Coffee account. Your contribution helps me create valuable content and resources. Thank you for your support!

Buy Me A Coffee Banner

Buy Me A Coffee

Top comments (0)

Read next

bach_lee_89 profile image

Scrape Data from Shopee

Bach Lee -

abdevhub profile image

Optimizing iOS App Performance

AB Dev Hub -

bear_lai_a8a333ed6d7b72e0 profile image

How I Used Free SEO Tools to Make My Small Website Stand Out—And Saw a Huge Traffic Boost!

Bear Lai -

ericc profile image

Estile: AI-Driven Clothing Recommendations Enhanced by Bright Data Scraping

Erick Christian -