Ensuring Seamless Browser Compatibility

For individuals engaged in TypeScript/JavaScript development, there's a common scenario where packages function seamlessly within a Node.js environment but encounter issues when utilized in a browser setting. Consequently, it becomes imperative to conduct thorough testing of Node.js packages in a browser environment before releasing them. To facilitate this testing process, a straightforward method involves creating and executing a script directly in the browser, thereby ensuring that the functionality aligns with expectations.

In this article, we present a concise script utilizing the Azure JavaScript SDK to interact with Azure Cosmos DB. It's noteworthy that this approach can be applied to any use case when testing a npm package in a browser environment before making it public.

By leveraging the @azure/cosmos package, we'll employ a combination of HTML, JavaScript, and potentially utilize a bundler like Webpack. We will guide you through a step-by-step approach, illustrating how to seamlessly integrate and test your npm package in a browser environment.

Here are the steps:

Create a new directory for your project:
```
 mkdir cosmos-script
 cd cosmos-script
```
Initialize your project:
```
 npm init -y
```
Install required packages:
```
 npm install @azure/cosmos
```

Create your HTML file (index.html):

 <!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Cosmos DB Query</title>
 </head>
 <body>
     <script src="dist/bundle.js"></script>
 </body>
 </html>

Create your JavaScript file (index.js):

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

 const endpoint = 'YOUR_COSMOS_DB_ENDPOINT';
 const key = 'YOUR_COSMOS_DB_KEY';
 const databaseId = 'YOUR_DATABASE_ID';
 const containerId = 'YOUR_CONTAINER_ID';

 const client = new CosmosClient({ endpoint, key });

 async function queryContainer() {
     const database = client.database(databaseId);
     const container = database.container(containerId);

     const querySpec = {
         query: 'SELECT * FROM c'
     };

     const { resources: results } = await container.items.query(querySpec).fetchAll();

     console.log('Query results:', results);
 }

 queryContainer();

Replace 'YOUR_COSMOS_DB_ENDPOINT', 'YOUR_COSMOS_DB_KEY', 'YOUR_DATABASE_ID', and 'YOUR_CONTAINER_ID' with your actual Cosmos DB information.

Create a Webpack configuration file (webpack.config.js):

 const path = require('path');

 module.exports = {
     entry: './index.js',
     output: {
         filename: 'bundle.js',
         path: path.resolve(__dirname, 'dist'),
     },
 };

Install Webpack:

 npm install webpack webpack-cli --save-dev

Run Webpack:
```
 npx webpack
```
Open your HTML file in a browser: Open the index.html file in a web browser. The browser will load the bundle.js file, which contains your Cosmos DB query script.
Check for script output inside console tab of browser:

In this way you would be able to check your node package compatibility with browser.

Ensuring Seamless Browser Compatibility

Testing Node.js Packages in browser environment