http.md

HTTP Course Learnings

In the HTTP course, I acquired a fundamental understanding of how to work with HTTP requests and asynchronous operations. Below are the key takeaways from the course:

Asynchronous Execution

I learned how to write code that executes asynchronously, allowing for non-blocking operations. This is essential for web applications to maintain responsiveness while performing tasks that may take some time to complete.

Callback Functions

I gained the ability to use callback functions effectively to access values that aren't available synchronously. Callbacks are a crucial concept in handling asynchronous code and can be employed to ensure that specific operations occur only after others have finished.

Promises

I learned how to use promises to manage asynchronous code. Promises provide a structured way to handle operations that may not be available immediately, making the code more readable and maintainable.

HTTP Requests

Understanding the principles of making HTTP requests and handling responses was a central part of the course. I became proficient in using the fetch method to initiate HTTP requests and receive responses from web servers.

Fetch Options Configuration

I also learned to configure the options argument of the fetch method for making various types of requests, such as GET and POST. This flexibility allows me to tailor my requests to the specific needs of my web application.

As a practical example, here is code that uses the fetch method to make an HTTP request:

fetch("https://echo.oliverjam.workers.dev/status/404")
  .then((response) => {
    if (!response.ok) {
      const error = new Error(response.status);
      throw error;
    }
    console.log(response);
  })
  .catch(console.error);

Async/Await

Understanding the principles of asynchronous code execution was taken a step further with the introduction of async and await. I can now use async functions to write asynchronous code that reads more like synchronous code, improving code readability.

async function fetchData() {
  try {
    const response = await fetch("https://jsonplaceholder.typicode.com/posts/1");
    
    if (!response.ok) {
      throw new Error(`HTTP Error! Status: ${response.status}`);
    }
    
    const data = await response.json();
    console.log("Data received:", data);
  } catch (error) {
    console.error("An error occurred:", error);
  }
}

// Call the async function to fetch data
fetchData();