14. Asynchronous Code in JS

Módulo 1 · Mídia Course's Objectives
Módulo 2 · Mídia Try catch blocks
Módulo 3 · Mídia Synchronous Execution
Módulo 4 · Mapa mental Asynchronous Code
Módulo 5 · Mapa mental The event loop
Módulo 6 · Mídia Callback functions
Módulo 7 · Mídia Nested Callbacks
Módulo 8 · Mídia Add more rulers
Módulo 9 · Mídia Callback Hell
Módulo 10 · Mídia Promises
Módulo 11 · Mídia The .then() function
Módulo 12 · Mídia Chain promises
Módulo 13 · Mídia Promisify everything
Módulo 14 · Mídia Catching a promise error
Módulo 15 · Fluxograma AJAX Calls Você está aqui
Módulo 16 · Mídia The fetch API
Módulo 17 · Mídia Working with JSON data
Módulo 18 · Mídia Fetch Json
Módulo 19 · Mídia Weather Info exercise
Módulo 20 · Mídia Async/await
Módulo 21 · Mídia Async/Await weather Rewrite
Módulo 22 · Mídia Promise.all
Módulo 23 · Mídia Make multiple requests at once

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Módulo 15 de 23 · Fluxograma

AJAX Calls

Kostas Diakogiannis

AJAX Calls

AJAX was introduced back in 2005, and it stands for Asynchronous JavaScript And XML.

In reality when we refer to AJAX calls, we mean the communication between a client and the server that takes place asynchronously (at the background).

Normally the client-server model requires a client to make a request from a server in order to send or receive some data from it. This operation could take more than 1-2 seconds, and if we do it synchronously, then we will pause the execution of our page until the response comes back. Luckily by making AJAX calls the whole request-response happens on the background (the user many times doesn't even notice) asynchronously.

That means that when the response comes back from the server, the whole page doesn't need to be reloaded as before. Thus we update only a small portion of the page, without refreshing everything.

AJAX Calls

14. Asynchronous Code in JS

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