Build a Node.js console app with the JavaScript SDK to manage Azure Cosmos DB SQL API data

• Learn More About Azure Cosmos DB Today

As a developer, you might have applications that use NoSQL document data. You can use a SQL API account in Azure Cosmos DB to store and access this document data. This tutorial shows you how to build a Node.js console application to create Azure Cosmos DB resources and query them.

In this tutorial, you will:

Prerequisites

Make sure you have the following resources:

• An active Azure account. If you don't have one, you can sign up for a Free Azure Trial.

  You can Try Azure Cosmos DB for free without an Azure subscription, free of charge and commitments. Or, you can use the Azure Cosmos DB Emulator with a URI of https://localhost:8081. The Primary Key is provided in Authenticating requests.

• Node.js v6.0.0 or higher.

Create Azure Cosmos DB account

Let's create an Azure Cosmos DB account. If you already have an account you want to use, you can skip ahead to Set up your Node.js application. If you are using the Azure Cosmos DB Emulator, follow the steps at Azure Cosmos DB Emulator to set up the emulator and skip ahead to Set up your Node.js application.

1. In a new browser window, sign in to the Azure portal.

2. Select Create a resource > Databases > Azure Cosmos DB.

   

3. On the Create Azure Cosmos DB Account page, enter the basic settings for the new Azure Cosmos DB account.

   Setting	Value	Description
   Subscription	Your subscription	Select the Azure subscription that you want to use for this Azure Cosmos DB account.
   Resource Group	Create new Then enter the same unique name as provided in ID	Select Create new. Then enter a new resource-group name for your account. For simplicity, use the same name as your ID.
   Account Name	Enter a unique name	Enter a unique name to identify your Azure Cosmos DB account. Because documents.azure.com is appended to the ID that you provide to create your URI, use a unique ID. The ID can only contain lowercase letters, numbers, and the hyphen (-) character. It must be between 3 and 31 characters in length.
   API	Core(SQL)	The API determines the type of account to create. Azure Cosmos DB provides five APIs: Core(SQL) for document databases, Gremlin for graph databases, MongoDB for document databases, Azure Table, and Cassandra. Currently, you must create a separate account for each API. Select Core(SQL) because in this article you create a document database and query by using SQL syntax. Learn more about the SQL API.
   Location	Select the region closest to your users	Select a geographic location to host your Azure Cosmos DB account. Use the location that's closest to your users to give them the fastest access to the data.

   Select Review+Create. You can skip the Network and Tags section.

   

4. The account creation takes a few minutes. Wait for the portal to display the Congratulations! Your Azure Cosmos DB account was created page.

   

Set up your Node.js application

Before you start writing code to build the application, you can build the framework for your app. Run the following steps to set up your Node.js application that has the framework code:

1. Open your favorite terminal.
2. Locate the folder or directory where you'd like to save your Node.js application.

3. Create two empty JavaScript files with the following commands:

   • Windows:

     • fsutil file createnew app.js 0
     • fsutil file createnew config.js 0

   • Linux/OS X:

     • touch app.js
     • touch config.js

4. Install the @azure/cosmos module via npm. Use the following command:

   • npm install @azure/cosmos --save

Set your app's configurations

Now that your app exists, you need to make sure it can talk to Azure Cosmos DB. By updating a few configuration settings, as shown in the following steps, you can set your app to talk to Azure Cosmos DB:

1. Open config.js in your favorite text editor.

2. Copy and paste the code snippet below and set properties config.endpoint and config.primaryKey to your Azure Cosmos DB endpoint URI and primary key. Both these configurations can be found in the Azure portal.

   

   // ADD THIS PART TO YOUR CODE
   var config = {}
   
   config.endpoint = "~your Azure Cosmos DB endpoint uri here~";
   config.primaryKey = "~your primary key here~";

3. Copy and paste the database, container, and items data to your config object below where you set your config.endpoint and config.primaryKey properties. If you already have data you'd like to store in your database, you can use the Data Migration tool in Azure Cosmos DB rather than defining the data here.

   var config = {}
   
   config.endpoint = "~your Azure Cosmos DB account endpoint uri here~";
   config.primaryKey = "~your primary key here~";
   
   config.database = {
      "id": "FamilyDatabase"
   };
   
   config.container = {
     "id": "FamilyContainer"
   };
   
   config.items = {
      "Andersen": {
          "id": "Anderson.1",
          "lastName": "Andersen",
          "parents": [{
            "firstName": "Thomas"
        }, {
                "firstName": "Mary Kay"
            }],
        "children": [{
            "firstName": "Henriette Thaulow",
            "gender": "female",
            "grade": 5,
            "pets": [{
                "givenName": "Fluffy"
            }]
        }],
        "address": {
            "state": "WA",
            "county": "King",
            "city": "Seattle"
        }
    },
    "Wakefield": {
        "id": "Wakefield.7",
        "parents": [{
            "familyName": "Wakefield",
            "firstName": "Robin"
        }, {
                "familyName": "Miller",
                "firstName": "Ben"
            }],
        "children": [{
            "familyName": "Merriam",
            "firstName": "Jesse",
            "gender": "female",
            "grade": 8,
            "pets": [{
                "givenName": "Goofy"
            }, {
                    "givenName": "Shadow"
                }]
        }, {
                "familyName": "Miller",
                "firstName": "Lisa",
                "gender": "female",
                "grade": 1
            }],
        "address": {
            "state": "NY",
            "county": "Manhattan",
            "city": "NY"
        },
        "isRegistered": false
      }
   };

   JavaScript SDK uses the generic terms container and item. A container can be a collection, graph, or table. An item can be a document, edge/vertex, or row, and is the content inside a container.

4. Finally, export your config object, so that you can reference it within the app.js file.

        },
        "isRegistered": false
       }
   };
   
   // ADD THIS PART TO YOUR CODE
   module.exports = config;

Connect to an Azure Cosmos DB account

1. Open your empty app.js file in the text editor. Copy and paste the code below to import the @azure/cosmos module and your newly created config module.

   // ADD THIS PART TO YOUR CODE
   const CosmosClient = require('@azure/cosmos').CosmosClient;
   
   const config = require('./config');
   const url = require('url');

2. Copy and paste the code to use the previously saved config.endpoint and config.primaryKey to create a new CosmosClient.

   const url = require('url');
   
   // ADD THIS PART TO YOUR CODE
   const endpoint = config.endpoint;
   const masterKey = config.primaryKey;
   
   const client = new CosmosClient({ endpoint: endpoint, auth: { masterKey: masterKey } });

Now that you have the code to initialize the Azure Cosmos DB client, let's take a look at how to work with Azure Cosmos DB resources.

Create a database

1. Copy and paste the code below to set the database ID, and the container ID. These IDs are how the Azure Cosmos DB client will find the right database and container.

   const client = new CosmosClient({ endpoint: endpoint, auth: { masterKey: masterKey } });
   
   // ADD THIS PART TO YOUR CODE
   const HttpStatusCodes = { NOTFOUND: 404 };
   
   const databaseId = config.database.id;
   const containerId = config.container.id;

   A database can be created by using either the createIfNotExists or create function of the Databases class. A database is the logical container of items partitioned across containers.

2. Copy and paste the createDatabase and readDatabase methods into the app.js file under the databaseId and containerId definition. The createDatabase function will create a new database with id FamilyDatabase, specified from the config object if it does not already exist. The readDatabase function will read the database's definition to ensure that the database exists.

   /**
    * Create the database if it does not exist
    */
   async function createDatabase() {
       const { database } = await client.databases.createIfNotExists({ id: databaseId });
       console.log(`Created database:\n${database.id}\n`);
   }
   
   /**
   * Read the database definition
   */
   async function readDatabase() {
      const { body: databaseDefinition } = await client.database(databaseId).read();
      console.log(`Reading database:\n${databaseDefinition.id}\n`);
   }

3. Copy and paste the code below where you set the createDatabase and readDatabase functions to add the helper function exit that will print the exit message.

   // ADD THIS PART TO YOUR CODE
   function exit(message) {
      console.log(message);
      console.log('Press any key to exit');
      process.stdin.setRawMode(true);
      process.stdin.resume();
      process.stdin.on('data', process.exit.bind(process, 0));
   };

4. Copy and paste the code below where you set the exit function to call the createDatabase and readDatabase functions.

   createDatabase()
     .then(() => readDatabase())
     .then(() => { exit(`Completed successfully`); })
     .catch((error) => { exit(`Completed with error \${JSON.stringify(error)}`) });

   At this point, your code in app.js should now look as following code:

   const CosmosClient = require('@azure/cosmos').CosmosClient;
   
   const config = require('./config');
   const url = require('url');
   
   const endpoint = config.endpoint;
   const masterKey = config.primaryKey;
   
   const client = new CosmosClient({ endpoint: endpoint, auth: { masterKey: masterKey } });
   
   const HttpStatusCodes = { NOTFOUND: 404 };
   
   const databaseId = config.database.id;
   const containerId = config.container.id;
   
    /**
    * Create the database if it does not exist
    */
    async function createDatabase() {
     const { database } = await client.databases.createIfNotExists({ id: databaseId });
     console.log(`Created database:\n${database.id}\n`);
   }
   
   /**
   * Read the database definition
   */
   async function readDatabase() {
     const { body: databaseDefinition } = await client.database(databaseId).read();
    console.log(`Reading database:\n${databaseDefinition.id}\n`);
   }
   
   /**
   * Exit the app with a prompt
   * @param {message} message - The message to display
   */
   function exit(message) {
     console.log(message);
     console.log('Press any key to exit');
     process.stdin.setRawMode(true);
     process.stdin.resume();
     process.stdin.on('data', process.exit.bind(process, 0));
   }
   
   createDatabase()
     .then(() => readDatabase())
     .then(() => { exit(`Completed successfully`); })
     .catch((error) => { exit(`Completed with error ${JSON.stringify(error) }`) });

5. In your terminal, locate your app.js file and run the command:

   node app.js

Create a container

Next create a container within the Azure Cosmos DB account, so that you can store and query the data.

A container can be created by using either the createIfNotExists or create function from the Containers class. A container consists of items (which in the case of the SQL API is JSON documents) and associated JavaScript application logic.

1. Copy and paste the createContainer and readContainer function underneath the readDatabase function in the app.js file. The createContainer function will create a new container with the containerId specified from the config object if it does not already exist. The readContainer function will read the container definition to verify the container exists.

   /**
   * Create the container if it does not exist
   */
   async function createContainer() {
    const { container } = await client.database(databaseId).containers.createIfNotExists({ id: containerId });
    console.log(`Created container:\n${config.container.id}\n`);
   }
   
   /**
   * Read the container definition
   */
   async function readContainer() {
     const { body: containerDefinition } = await client.database(databaseId).container(containerId).read();
     console.log(`Reading container:\n${containerDefinition.id}\n`);
   }

2. Copy and paste the code underneath the call to readDatabase to execute the createContainer and readContainer functions.

   createDatabase()
     .then(() => readDatabase())
   
     // ADD THIS PART TO YOUR CODE
     .then(() => createContainer())
     .then(() => readContainer())
     // ENDS HERE
   
     .then(() => { exit(`Completed successfully`); })
     .catch((error) => { exit(`Completed with error ${JSON.stringify(error)}`) });

   At this point, your code in app.js should now look like this:

   const CosmosClient = require('@azure/cosmos').CosmosClient;
   
   const config = require('./config');
   const url = require('url');
   
   const endpoint = config.endpoint;
   const masterKey = config.primaryKey;
   
   const client = new CosmosClient({ endpoint: endpoint, auth: { masterKey: masterKey } });
   
   const HttpStatusCodes = { NOTFOUND: 404 };
   
   const databaseId = config.database.id;
   const containerId = config.container.id;
   
   /**
   * Create the database if it does not exist
   */
   async function createDatabase() {
     const { database } = await client.databases.createIfNotExists({ id: databaseId });
     console.log(`Created database:\n${database.id}\n`);
   }
   
   /**
   * Read the database definition
   */
   async function readDatabase() {
     const { body: databaseDefinition } = await client.database(databaseId).read();
     console.log(`Reading database:\n${databaseDefinition.id}\n`);
   }
   
   /**
   * Create the container if it does not exist
   */
   async function createContainer() {
     const { container } = await client.database(databaseId).containers.createIfNotExists({ id: containerId });
     console.log(`Created container:\n${config.container.id}\n`);
   }
   
   /**
   * Read the container definition
   */
   async function readContainer() {
     const { body: containerDefinition } = await client.database(databaseId).container(containerId).read();
     console.log(`Reading container:\n${containerDefinition.id}\n`);
   }
   
   /**
   * Exit the app with a prompt
   * @param {message} message - The message to display
   */
   function exit(message) {
     console.log(message);
     console.log('Press any key to exit');
     process.stdin.setRawMode(true);
     process.stdin.resume();
     process.stdin.on('data', process.exit.bind(process, 0));
   }
   
   createDatabase()
     .then(() => readDatabase())
     .then(() => createContainer())
     .then(() => readContainer())
     .then(() => { exit(`Completed successfully`); })
     .catch((error) => { exit(`Completed with error ${JSON.stringify(error)}`) });

3. In your terminal, locate your app.js file and run the command:

   node app.js

Create an item

An item can be created by using the create function of the Items class. When you're using the SQL API, items are projected as documents, which are user-defined (arbitrary) JSON content. You can now insert an item into Azure Cosmos DB.

1. Copy and paste the createFamilyItem function underneath the readContainer function. The createFamilyItem function creates the items containing the JSON data saved in the config object. We'll check to make sure an item with the same id does not already exist before creating it.

   /**
   * Create family item if it does not exist
   */
   async function createFamilyItem(itemBody) {
     try {
         // read the item to see if it exists
         const { item } = await client.database(databaseId).container(containerId).item(itemBody.id).read();
         console.log(`Item with family id ${itemBody.id} already exists\n`);
     }
     catch (error) {
        // create the family item if it does not exist
        if (error.code === HttpStatusCodes.NOTFOUND) {
            const { item } = await client.database(databaseId).container(containerId).items.create(itemBody);
            console.log(`Created family item with id:\n${itemBody.id}\n`);
        } else {
            throw error;
        }
     }
   };

2. Copy and paste the code below the call to readContainer to execute the createFamilyItem function.

   createDatabase()
     .then(() => readDatabase())
     .then(() => createContainer())
     .then(() => readContainer())
   
     // ADD THIS PART TO YOUR CODE
     .then(() => createFamilyItem(config.items.Andersen))
     .then(() => createFamilyItem(config.items.Wakefield))
     // ENDS HERE
   
     .then(() => { exit(`Completed successfully`); })
     .catch((error) => { exit(`Completed with error ${JSON.stringify(error)}`) });

3. In your terminal, locate your app.js file and run the command:

   node app.js

Query Azure Cosmos DB resources

Azure Cosmos DB supports rich queries against JSON documents stored in each container. The following sample code shows a query that you can run against the documents in your container.

1. Copy and paste the queryContainer function below the createFamilyItem function in the app.js file. Azure Cosmos DB supports SQL-like queries as shown below.

   /**
   * Query the container using SQL
    */
   async function queryContainer() {
     console.log(`Querying container:\n${config.container.id}`);
   
     // query to return all children in a family
     const querySpec = {
        query: "SELECT VALUE r.children FROM root r WHERE r.lastName = @lastName",
        parameters: [
            {
                name: "@lastName",
                value: "Andersen"
            }
        ]
    };
   
    const { result: results } = await client.database(databaseId).container(containerId).items.query(querySpec).toArray();
    for (var queryResult of results) {
        let resultString = JSON.stringify(queryResult);
        console.log(`\tQuery returned ${resultString}\n`);
    }
   };

2. Copy and paste the code below the calls to createFamilyItem to execute the queryContainer function.

   createDatabase()
     .then(() => readDatabase())
     .then(() => createContainer())
     .then(() => readContainer())
     .then(() => createFamilyItem(config.items.Andersen))
     .then(() => createFamilyItem(config.items.Wakefield))
   
     // ADD THIS PART TO YOUR CODE
     .then(() => queryContainer())
     // ENDS HERE
   
     .then(() => { exit(`Completed successfully`); })
     .catch((error) => { exit(`Completed with error ${JSON.stringify(error)}`) });

3. In your terminal, locate your app.js file and run the command:

   node app.js

Replace an item

Azure Cosmos DB supports replacing the content of items.

1. Copy and paste the replaceFamilyItem function below the queryContainer function in the app.js file. Note we've changed the property 'grade' of a child to 6 from the previous value of 5.

   // ADD THIS PART TO YOUR CODE
   /**
   * Replace the item by ID.
   */
   async function replaceFamilyItem(itemBody) {
      console.log(`Replacing item:\n${itemBody.id}\n`);
      // Change property 'grade'
      itemBody.children[0].grade = 6;
      const { item } = await client.database(databaseId).container(containerId).item(itemBody.id).replace(itemBody);
   };

2. Copy and paste the code below the call to queryContainer to execute the replaceFamilyItem function. Also, add the code to call queryContainer again to verify that item has successfully changed.

   createDatabase()
     .then(() => readDatabase())
     .then(() => createContainer())
     .then(() => readContainer())
     .then(() => createFamilyItem(config.items.Andersen))
     .then(() => createFamilyItem(config.items.Wakefield))
     .then(() => queryContainer())
   
     // ADD THIS PART TO YOUR CODE
     .then(() => replaceFamilyItem(config.items.Andersen))
     .then(() => queryContainer())
     // ENDS HERE
   
     .then(() => { exit(`Completed successfully`); })
     .catch((error) => { exit(`Completed with error ${JSON.stringify(error)}`) });

3. In your terminal, locate your app.js file and run the command:

   node app.js

Delete an item

Azure Cosmos DB supports deleting JSON items.

1. Copy and paste the deleteFamilyItem function underneath the replaceFamilyItem function.

   /**
   * Delete the item by ID.
   */
   async function deleteFamilyItem(itemBody) {
      await client.database(databaseId).container(containerId).item(itemBody.id).delete(itemBody);
      console.log(`Deleted item:\n${itemBody.id}\n`);
   };

2. Copy and paste the code below the call to the second queryContainer to execute the deleteFamilyItem function.

   createDatabase()
      .then(() => readDatabase())
      .then(() => createContainer())
      .then(() => readContainer())
      .then(() => createFamilyItem(config.items.Andersen))
      .then(() => createFamilyItem(config.items.Wakefield))
      .then(() => queryContainer
      ())
      .then(() => replaceFamilyItem(config.items.Andersen))
      .then(() => queryContainer())
   
    // ADD THIS PART TO YOUR CODE
      .then(() => deleteFamilyItem(config.items.Andersen))
    // ENDS HERE
   
    .then(() => { exit(`Completed successfully`); })
    .catch((error) => { exit(`Completed with error ${JSON.stringify(error)}`) });

3. In your terminal, locate your app.js file and run the command:

   node app.js

Delete the database

Deleting the created database will remove the database and all children resources (containers, items, etc.).

1. Copy and paste the cleanup function underneath the deleteFamilyItem function to remove the database and all its children resources.

   /**
   * Cleanup the database and container on completion
   */
   async function cleanup() {
     await client.database(databaseId).delete();
   }

2. Copy and paste the code below the call to deleteFamilyItem to execute the cleanup function.

   createDatabase()
      .then(() => readDatabase())
      .then(() => createContainer())
      .then(() => readContainer())
      .then(() => createFamilyItem(config.items.Andersen))
      .then(() => createFamilyItem(config.items.Wakefield))
      .then(() => queryContainer())
      .then(() => replaceFamilyItem(config.items.Andersen))
      .then(() => queryContainer())
      .then(() => deleteFamilyItem(config.items.Andersen))
   
      // ADD THIS PART TO YOUR CODE
      .then(() => cleanup())
      // ENDS HERE
   
      .then(() => { exit(`Completed successfully`); })
      .catch((error) => { exit(`Completed with error ${JSON.stringify(error)}`) });

Run your Node.js application

Altogether, your code should look like this:

const CosmosClient = require('@azure/cosmos').CosmosClient;

const config = require('./config');
const url = require('url');

const endpoint = config.endpoint;
const masterKey = config.primaryKey;

const HttpStatusCodes = { NOTFOUND: 404 };

const databaseId = config.database.id;
const containerId = config.container.id;

const client = new CosmosClient({ endpoint: endpoint, auth: { masterKey: masterKey } });

/**
 * Create the database if it does not exist
 */
async function createDatabase() {
    const { database } = await client.databases.createIfNotExists({ id: databaseId });
    console.log(`Created database:\n${database.id}\n`);
}

/**
 * Read the database definition
 */
async function readDatabase() {
    const { body: databaseDefinition } = await client.database(databaseId).read();
    console.log(`Reading database:\n${databaseDefinition.id}\n`);
}

/**
 * Create the container if it does not exist
 */
async function createContainer() {
    const { container } = await client.database(databaseId).containers.createIfNotExists({ id: containerId });
    console.log(`Created container:\n${config.container.id}\n`);
}

/**
 * Read the container definition
 */
async function readContainer() {
    const { body: containerDefinition } = await client.database(databaseId).container(containerId).read();
    console.log(`Reading container:\n${containerDefinition.id}\n`);
}

/**
 * Create family item if it does not exist
 */
async function createFamilyItem(itemBody) {
    try {
        // read the item to see if it exists
        const { item } = await client.database(databaseId).container(containerId).item(itemBody.id).read();
        console.log(`Item with family id ${itemBody.id} already exists\n`);
    }
    catch (error) {
        // create the family item if it does not exist
        if (error.code === HttpStatusCodes.NOTFOUND) {
            const { item } = await client.database(databaseId).container(containerId).items.create(itemBody);
            console.log(`Created family item with id:\n${itemBody.id}\n`);
        } else {
            throw error;
        }
    }
};

/**
 * Query the container using SQL
 */
async function queryContainer() {
    console.log(`Querying container:\n${config.container.id}`);

    // query to return all children in a family
    const querySpec = {
        query: "SELECT VALUE r.children FROM root r WHERE r.lastName = @lastName",
        parameters: [
            {
                name: "@lastName",
                value: "Andersen"
            }
        ]
    };

    const { result: results } = await client.database(databaseId).container(containerId).items.query(querySpec).toArray();
    for (var queryResult of results) {
        let resultString = JSON.stringify(queryResult);
        console.log(`\tQuery returned ${resultString}\n`);
    }
};

/**
 * Replace the item by ID.
 */
async function replaceFamilyItem(itemBody) {
    console.log(`Replacing item:\n${itemBody.id}\n`);
    // Change property 'grade'
    itemBody.children[0].grade = 6;
    const { item } = await client.database(databaseId).container(containerId).item(itemBody.id).replace(itemBody);
};

/**
 * Delete the item by ID.
 */
async function deleteFamilyItem(itemBody) {
    await client.database(databaseId).container(containerId).item(itemBody.id).delete(itemBody);
    console.log(`Deleted item:\n${itemBody.id}\n`);
};

/**
 * Cleanup the database and container on completion
 */
async function cleanup() {
    await client.database(databaseId).delete();
}

/**
 * Exit the app with a prompt
 * @param {message} message - The message to display
 */
function exit(message) {
    console.log(message);
    console.log('Press any key to exit');
    process.stdin.setRawMode(true);
    process.stdin.resume();
    process.stdin.on('data', process.exit.bind(process, 0));
}

createDatabase()
    .then(() => readDatabase())
    .then(() => createContainer())
    .then(() => readContainer())
    .then(() => createFamilyItem(config.items.Andersen))
    .then(() => createFamilyItem(config.items.Wakefield))
    .then(() => queryContainer())
    .then(() => replaceFamilyItem(config.items.Andersen))
    .then(() => queryContainer())
    .then(() => deleteFamilyItem(config.items.Andersen))
    .then(() => cleanup())
    .then(() => { exit(`Completed successfully`); })
    .catch((error) => { exit(`Completed with error ${JSON.stringify(error)}`) });

In your terminal, locate your app.js file and run the command:

node app.js

You should see the output of your get started app. The output should match the example text below.

Created database:
FamilyDatabase

Reading database:
FamilyDatabase

Created container:
FamilyContainer

Reading container:
FamilyContainer

Created family item with id:
Anderson.1

Created family item with id:
Wakefield.7

Querying container:
FamilyContainer
        Query returned [{"firstName":"Henriette Thaulow","gender":"female","grade":5,"pets":[{"givenName":"Fluffy"}]}]

Replacing item:
Anderson.1

Querying container:
FamilyContainer
        Query returned [{"firstName":"Henriette Thaulow","gender":"female","grade":6,"pets":[{"givenName":"Fluffy"}]}]

Deleted item:
Anderson.1

Completed successfully
Press any key to exit

Get the complete Node.js tutorial solution

If you didn't have time to complete the steps in this tutorial, or just want to download the code, you can get it from GitHub.

To run the getting started solution that contains all the code in this article, you will need:

• An Azure Cosmos DB account.
• The Getting Started solution available on GitHub.

Install the @azure/cosmos module via npm. Use the following command:

• npm install @azure/cosmos --save

Next, in the config.js file, update the config.endpoint and config.primaryKey values as described in Step 3: Set your app's configurations.

Then in your terminal, locate your app.js file and run the command:

node app.js 

Clean up resources

When these resources are no longer needed, you can delete the resource group, Azure Cosmos DB account, and all the related resources. To do so, select the resource group that you used for the Azure Cosmos DB account, select Delete, and then confirm the name of the resource group to delete.