npm package: @justin-atlas/shopify-buy
Description: The JS Buy SDK is a lightweight library that allows you to build ecommerce into any website. It is based on Shopify's API and provides the ability to retrieve products and collections from your shop, add products to a cart, and checkout.
Author: Shopify Inc.
Latest version: 1.0.0

# [Shopify](https://www.shopify.com) JavaScript Buy SDK
[![Travis](https://travis-ci.com/Shopify/js-buy-sdk.svg?branch=master)](https://travis-ci.com/Shopify/js-buy-sdk)

**Note**: For help with migrating from v0 of JS Buy SDK to v1 check out the
[Migration Guide](https://github.com/Shopify/js-buy-sdk/blob/master/tutorials/MIGRATION_GUIDE.md).

The JS Buy SDK is a lightweight library that allows you to build ecommerce into
any website. It's based on Shopify's [Storefront API](https://help.shopify.com/api/storefront-api/getting-started)
and provides the ability to retrieve products and collections from your shop, add products to a cart, and checkout.

[Full API docs are available here](https://help.shopify.com/en/api/storefront-api/reference).

## Changelog

View our [Changelog](https://github.com/Shopify/js-buy-sdk/blob/master/CHANGELOG.md) for details about our releases.

## Table Of Contents

- [Installation](#installation)
- [Builds](#builds)
- [Examples](#examples)
  + [Initializing the Client](#initializing-the-client)
  + [Fetching Products](#fetching-products)
  + [Fetching Collections](#fetching-collections)
  + [Creating a Checkout](#creating-a-checkout)
  + [Updating Checkout Attributes](#updating-checkout-attributes)
  + [Adding Line Items](#adding-line-items)
  + [Updating Line Items](#updating-line-items)
  + [Removing Line Items](#removing-line-items)
  + [Fetching a Checkout](#fetching-a-checkout)
  + [Adding a Discount](#adding-a-discount)
  + [Removing a Discount](#removing-a-discount)
  + [Updating a Shipping Address](#updating-a-shipping-address)
  + [Completing a checkout](#completing-a-checkout)
- [Expanding the SDK](#expanding-the-sdk)
  + [Initializing the Client](#initializing-the-client-1)
  + [Fetching Products](#fetching-products-1)
- [Example Apps](#example-apps)
- [Documentation](#documentation)
- [Contributing](#contributing)
- [Code of Conduct](#code-of-conduct)
- [License](#license)

## Installation
**With Yarn:**
```bash
$ yarn add shopify-buy
```
**With NPM:**
```bash
$ npm install shopify-buy
```

**CDN:**

There is a minified UMD build available via CDN (see the [Changelog](https://github.com/Shopify/js-buy-sdk/blob/master/CHANGELOG.md) for details about the latest release):

```html
<script src="http://sdks.shopifycdn.com/js-buy-sdk/v2/latest/index.umd.min.js"></script>
```

You can also use a specific release version:

```html
<script src="https://sdks.shopifycdn.com/js-buy-sdk/1.11.0/index.umd.min.js"></script>
```

You can also fetch the unoptimized release for a version (2.0.1 and above). This will be larger than the optimized version, as it will contain all fields that are available in the [Storefront API](https://help.shopify.com/en/api/custom-storefronts/storefront-api/reference):

```html
<script src="https://sdks.shopifycdn.com/js-buy-sdk/2.0.1/index.unoptimized.umd.min.js"></script>
```

## Builds
The JS Buy SDK has four build versions: ES, CommonJS, AMD, and UMD.

**ES, CommonJS:**
```javascript
import Client from 'shopify-buy';
```
**AMD:**
```javascript
import Client from 'shopify-buy/index.amd';
```
**UMD:**
```javascript
import Client from 'shopify-buy/index.umd';
```
**UMD Unoptimized:**
This will be larger than the optimized version, as it will contain all fields that are available in the [Storefront API](https://help.shopify.com/en/api/custom-storefronts/storefront-api/reference). This should only be used when you need to add custom queries to supplement the JS Buy SDK queries.

```javascript
import Client from 'shopify-buy/index.unoptimized.umd';
```

## Examples

### Initializing the Client
If your store supports multiple languages, Storefront API can return translated resource types and fields. Learn more about [translating content](https://help.shopify.com/en/api/guides/multi-language/translating-content-api).

```javascript
import Client from 'shopify-buy';

// Initializing a client to return content in the store's primary language
const client = Client.buildClient({
  domain: 'your-shop-name.myshopify.com',
  storefrontAccessToken: 'your-storefront-access-token'
});

// Initializing a client to return translated content
const clientWithTranslatedContent = Client.buildClient({
  domain: 'your-shop-name.myshopify.com',
  storefrontAccessToken: 'your-storefront-access-token',
  language: 'ja-JP'
});
```

### Fetching Products
```javascript
// Fetch all products in your shop
client.product.fetchAll().then((products) => {
  // Do something with the products
  console.log(products);
});

// Fetch a single product by ID
const productId = 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0Lzc4NTc5ODkzODQ=';

client.product.fetch(productId).then((product) => {
  // Do something with the product
  console.log(product);
});

// Fetch a single product by Handle
const handle = 'product-handle';

client.product.fetchByHandle(handle).then((product) => {
  // Do something with the product
  console.log(product);
});
```

### Fetching Collections
```javascript
// Fetch all collections, including their products
client.collection.fetchAllWithProducts().then((collections) => {
  // Do something with the collections
  console.log(collections);
  console.log(collections[0].products);
});

// Fetch a single collection by ID, including its products
const collectionId = 'Z2lkOi8vc2hvcGlmeS9Db2xsZWN0aW9uLzM2OTMxMjU4NA==';
// Set a parameter for first x products, defaults to 20 if you don't provide a param

client.collection.fetchWithProducts(collectionId, {productsFirst: 10}).then((collection) => {
  // Do something with the collection
  console.log(collection);
  console.log(collection.products);
});
```

### Creating a Checkout
```javascript
// Create an empty checkout
client.checkout.create().then((checkout) => {
  // Do something with the checkout
  console.log(checkout);
});
```

### Updating checkout attributes
```javascript
const checkoutId = 'Z2lkOi8vc2hvcGlmeS9DaGVja291dC9kMTZmM2EzMDM4Yjc4N=';
const input = {customAttributes: [{key: "MyKey", value: "MyValue"}]};

client.checkout.updateAttributes(checkoutId, input).then((checkout) => {
  // Do something with the updated checkout
});
```

### Adding Line Items
```javascript
const checkoutId = 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0SW1hZ2UvMTgyMTc3ODc1OTI='; // ID of an existing checkout
const lineItemsToAdd = [
  {
    variantId: 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0VmFyaWFudC8yOTEwNjAyMjc5Mg==',
    quantity: 5,
    customAttributes: [{key: "MyKey", value: "MyValue"}]
  }
];

// Add an item to the checkout
client.checkout.addLineItems(checkoutId, lineItemsToAdd).then((checkout) => {
  // Do something with the updated checkout
  console.log(checkout.lineItems); // Array with one additional line item
});
```

### Updating Line Items
```javascript
const checkoutId = 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0SW1hZ2UvMTgyMTc3ODc1OTI='; // ID of an existing checkout
const lineItemsToUpdate = [
  {id: 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0Lzc4NTc5ODkzODQ=', quantity: 2}
];

// Update the line item on the checkout (change the quantity or variant)
client.checkout.updateLineItems(checkoutId, lineItemsToUpdate).then((checkout) => {
  // Do something with the updated checkout
  console.log(checkout.lineItems); // Quantity of line item 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0Lzc4NTc5ODkzODQ=' updated to 2
});
```

### Removing Line Items
```javascript
const checkoutId = 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0SW1hZ2UvMTgyMTc3ODc1OTI='; // ID of an existing checkout
const lineItemIdsToRemove = [
  'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0Lzc4NTc5ODkzODQ='
];

// Remove an item from the checkout
client.checkout.removeLineItems(checkoutId, lineItemIdsToRemove).then((checkout) => {
  // Do something with the updated checkout
  console.log(checkout.lineItems); // Checkout with line item 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0Lzc4NTc5ODkzODQ=' removed
});
```

### Fetching a Checkout
```javascript
const checkoutId = '2U4NWNkYzI4ZWEyOTdlOD9rZXk9MDVjMzY3Zjk3YWM0YWJjNGRhMTkwMDgwYTUzOGJmYmI='

client.checkout.fetch(checkoutId).then((checkout) => {
  // Do something with the checkout
  console.log(checkout);
});
```

### Adding a Discount
```javascript
const checkoutId = 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0SW1hZ2UvMTgyMTc3ODc1OTI='; // ID of an existing checkout
const discountCode = 'best-discount-ever';

// Add a discount code to the checkout
client.checkout.addDiscount(checkoutId, discountCode).then(checkout => {
  // Do something with the updated checkout
  console.log(checkout);
});
```

### Removing a Discount
```javascript
const checkoutId = 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0SW1hZ2UvMTgyMTc3ODc1OTI='; // ID of an existing checkout

// Removes the applied discount from an existing checkout.
client.checkout.removeDiscount(checkoutId).then(checkout => {
  // Do something with the updated checkout
  console.log(checkout);
});
```

### Updating a Shipping Address
```javascript
const checkoutId = 'Z2lkOi8vc2hvcGlmeS9Qcm9kdWN0SW1hZ2UvMTgyMTc3ODc1OTI='; // ID of an existing checkout

const shippingAddress = {
   address1: 'Chestnut Street 92',
   address2: 'Apartment 2',
   city: 'Louisville',
   company: null,
   country: 'United States',
   firstName: 'Bob',
   lastName: 'Norman',
   phone: '555-625-1199',
   province: 'Kentucky',
   zip: '40202'
 };

// Update the shipping address for an existing checkout.
client.checkout.updateShippingAddress(checkoutId, shippingAddress).then(checkout => {
  // Do something with the updated checkout
});
```

### Completing a checkout

The simplest way to complete a checkout is to use the [webUrl](https://help.shopify.com/en/api/storefront-api/reference/object/checkout) property that is returned when creating a checkout. This URL redirects the customer to Shopify's [online checkout](https://help.shopify.com/en/manual/checkout-settings) to complete the purchase.

## Expanding the SDK

Not all fields that are available on the [Storefront API](https://help.shopify.com/en/api/custom-storefronts/storefront-api/reference) are exposed through the SDK. If you use the unoptimized version of the SDK, you can easily build your own queries. In order to do this, use the UMD Unoptimized build.

### Initializing the Client
```javascript
// fetch the large, unoptimized version of the SDK
import Client from 'shopify-buy/index.unoptimized.umd';

const client = Client.buildClient({
  domain: 'your-shop-name.myshopify.com',
  storefrontAccessToken: 'your-storefront-access-token'
});
```

### Fetching Products
```javascript
// Build a custom products query using the unoptimized version of the SDK
const productsQuery = client.graphQLClient.query((root) => {
  root.addConnection('products', {args: {first: 10}}, (product) => {
    product.add('title');
    product.add('tags');// Add fields to be returned
  });
});

// Call the send method with the custom products query
client.graphQLClient.send(productsQuery).then(({model, data}) => {
  // Do something with the products
  console.log(model);
});

```

## Example Apps

For more complete examples of using JS Buy SDK, check out our [storefront-api-examples](https://github.com/Shopify/storefront-api-examples) project.
There are JS Buy SDK specific example apps in Node, Ember, and React. You can use these examples as a guideline for creating your own custom storefront.

## Documentation

- [Getting started guide](https://help.shopify.com/en/api/storefront-api/tools/js-buy-sdk/getting-started)
- [API documentation](https://shopify.github.io/js-buy-sdk).

## Contributing
For help on setting up the repo locally, building, testing, and contributing
please see [CONTRIBUTING.md](https://github.com/Shopify/js-buy-sdk/blob/master/CONTRIBUTING.md).

## Code of Conduct
All developers who wish to contribute through code or issues, take a look at the
[CODE_OF_CONDUCT.md](https://github.com/Shopify/js-buy-sdk/blob/master/CODE_OF_CONDUCT.md).

## License

MIT, see [LICENSE.md](https://github.com/Shopify/js-buy-sdk/blob/master/LICENSE.txt) for details.

<img src="https://cdn.shopify.com/shopify-marketing_assets/builds/19.0.0/shopify-full-color-black.svg" width="200" />