What is Ajax?

• Asynchronous JavaScript & XML
• Set of web technologies
• Send & Receive data asynchronously
• Doesn’t interfere with the current page
• JSON has replaced XML for the most part

• Make async request in the background
• No page reload / refresh
• Fetch data
• Very interactive

XMLHttpRequest (XHR) Object

• API in the form of an object
• Provided by the browsers JS environment
• Methods transfer data between client / server
• Can be used with other protocols than HTTP
• Can work with data other than XML (JSON, plain text)

Libraries & Other Methods

• Fetch API – ( Suggested, part of Vanilla JavaScript)
• Axios
• Superagent
• jQuery -( Not suggested for ajax, complete DOM manipulation library )
• NodeHTTP