Process.env.base_url

Explanation:

The process.env.base_url is a reference to an environment variable named base_url. In web development, environment variables are commonly used to store sensitive information or configurable parameters that may vary across different environments (e.g., development, staging, production).

Environment variables can be set in the operating system or in specific deployment platforms, and their values can be accessed within the application code.

To illustrate with an example, let’s assume we have a backend server application that needs to make requests to an external API. The URL of the API may vary depending on the environment (e.g., development API, production API), so we set up an environment variable named base_url to store the API URL.

In our code, we can access this environment variable using process.env.base_url to dynamically fetch the API URL:

    // Assuming process.env.base_url is set to "https://api.example.com"
    const apiUrl = process.env.base_url;
    
    // Make a request to the API using the apiUrl
    fetch(apiUrl)
      .then(response => response.json())
      .then(data => console.log(data))
      .catch(error => console.error(error));
    
  

In this example, the fetch function is used to make a request to the API specified by the process.env.base_url. Since the value of process.env.base_url is “https://api.example.com”, the request will be sent to that URL.