Express.js Fundamentals: Building a BG3 Character Level-Up API - Part 4
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Welcome to the next exciting episode in our 'Full Stack Development with Express.js' series! Today, we're evolving our Character Level-Up API by moving beyond traditional HTML form submission to a more dynamic interaction using JavaScript and JSON.
What we cover in this video:
Transitioning from URL-encoded to JSON post requests.
Utilizing Hoppscotch.io to test and modify our POST request format.
Integrating express.json() as a new middleware to handle JSON data in our server.
Implementing JavaScript on the client side to override default form submission.
Understanding and using e.preventDefault() to control form behavior.
Capturing and processing form data to create JSON structured requests.
Writing a fetch POST request with the appropriate headers to send JSON data.
Synchronizing front-end and back-end data with chained fetch requests.
Dynamically updating the DOM without page refreshes, showcasing a React-like experience.
In this session, we dive deeper into the world of asynchronous JavaScript. We start by modifying our server to accept JSON data, using Hoppscotch.io to test and refine our API. Then, we take you to the front end, where we use JavaScript to take control of our form's submission process. You'll learn how to prevent the default form behavior, capture user input, and construct a JSON payload for our API.
We'll guide you through writing a fetch POST request and setting the necessary headers to correctly send JSON data to our server. Then, we explore how to chain promises to fetch and update character data in real-time, ensuring our front-end always reflects the latest server state.
By the end of this tutorial, you'll have a fully interactive web application that communicates seamlessly with the server, all without needing to refresh the page. This approach brings us closer to modern web application development practices, giving you a taste of what frameworks like React offer.
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#ExpressJS #JSON #ClientSideJavaScript #WebDevelopmentTutorial #APIIntegration #AsynchronousJavaScript
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