Integrating Express.js API into the Stock Analyzer Application

Express.js is a popular web framework for building APIs and web applications in Node.js. In this article, we will discuss how to integrate an Express.js API into a Stock Analyzer application to retrieve and display stock data.

Setting up the Express.js API

First, you will need to install Express.js by running the following command in your terminal:

npm install express

Once Express.js is installed, you can create a new file for your API, for example stock-api.js. In this file, you can set up routes to handle requests for stock data:

  const express = require('express');
  const app = express();

  app.get('/stocks/:symbol', (req, res) => {
    const symbol = req.params.symbol;
    // logic to retrieve stock data
    res.json({ symbol, price });
  });

  app.listen(3000, () => {
    console.log('Stock API running on port 3000');
  });
  

Integrating the API into the Stock Analyzer Application

Now that the Express.js API is set up, you can make requests to this API from your Stock Analyzer application. You can use fetch or axios to make API calls from your frontend code.

For example, you can fetch stock data for a specific symbol by making a GET request to the API endpoint:

  fetch('http://localhost:3000/stocks/AAPL')
    .then(response => response.json())
    .then(data => {
      // handle stock data
    });
  

Once you have retrieved the stock data, you can display it in your application to provide users with real-time stock information.

Conclusion

Integrating an Express.js API into a Stock Analyzer application can provide users with up-to-date stock data and enhance the functionality of your application. By following the steps outlined in this article, you can easily set up an API to retrieve stock data and integrate it into your application.