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LinkedIn Learning

JavaScript: Ajax and Fetch

via LinkedIn Learning

Overview

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Ajax is the backbone of high-performance web apps. Learn how to use vanilla JavaScript, Ajax, and APIs like Fetch and XHR to request and handle data and modify webpage content.

Syllabus

Introduction
  • Creating and working with API requests
  • Setting up your environment
1. Getting Started
  • What is Ajax?
  • Understand asynchronous program flow
  • Get an API key
  • Research and create an Ajax request URL
  • Create an XHR request
  • Test an XHR request
  • Handle XHR success and failure
  • Challenge: Build an XHR request
  • Solution: Build an XHR request
2. Modifying the DOM
  • What is the DOM?
  • Select elements with vanilla JavaScript
  • Request data in response to an event
  • Add an event listener
  • Work with JSON data
  • Modify form values with vanilla JavaScript
  • Modify element content with vanilla JavaScript
  • Challenge: Modify the DOM
  • Solution: Modify the DOM
3. Working with the Fetch API
  • Understand the Fetch API
  • Create a fetch request
  • Handle basic fetch errors
  • Customize a fetch request
4. Optimizing and Troubleshooting Ajax Requests
  • Structure Ajax requests for performance
  • View requests and responses in the browser
  • Work with authorization errors
  • Work with malformed requests
  • Work with errors in Fetch
  • Provide error fallbacks
  • Challenge: Fix an Ajax request
  • Solution: Fix an Ajax request
5. Building a Proxy Server to Hide API Keys
  • Why are proxy servers necessary?
  • Tools: Git, GitHub, and Heroku
  • Set up an app on Heroku
  • Configure proxy options
  • Deploy and test a proxy
  • Configure proxy security
  • Challenge: Customize code for an Ajax proxy
  • Solution: Customize code for an Ajax proxy
Conclusion
  • Next steps

Taught by

Sasha Vodnik

Reviews

4.8 rating at LinkedIn Learning based on 53 ratings

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