What is AJAX and Why Should I Care

[@thabesttheris]

you make the best JS tutorials on youtube bro thank you.

[@robinkartik6356]

I was always confuse with this topic, but now I understand the whole thing. Many thanks for this tutorial.

[@littlepudding853]

I was confused about why in some places use that and some places use another. This makes it pretty clear. Thanks.

[@divyanshu8874]

JUST SUPERB...❤️❤️❤️❤️❤️❤️❤️❤️

[@rockycafe313]

not sure if raining in the background, or its static-y mic. LOL anyways thanks!

[@SteveGriffith-Prof3ssorSt3v3]

Back in 2017 it was a crappy mic. :( After I got the good mic there were a few videos with rain and thunder in the background. :)

[@devkushwaha6682]

You make things always easy thanks bro, can you please make some videos for Apollo client and Apollo server

[@chesterxp508]

Brilliant tutorials :)

[@CesarJuarezVargas]

Is URI (lines 1 and 31) a variable name that you chose or the anagram for Uniform Resource Identifier? If the latter, what's the difference in using it v. URL?

[@SteveGriffith-Prof3ssorSt3v3]

Cesar Juarez-Vargas it is just a variable name that I picked. It was picked because it is an acronym

[@CesarJuarezVargas]

Correction: I meant acronym, not anagram.

[@rajasekhar5135]

Is ur series are enough for ajax or should I want to move so wat steeve😍 tell me

[@SteveGriffith-Prof3ssorSt3v3]

Not sure I understand your question.

[@rajasekhar5135]

@@SteveGriffith-Prof3ssorSt3v3 am asking that is ur ajax series is enough for entire ajax......

[@SteveGriffith-Prof3ssorSt3v3]

@@rajasekhar5135 It's more than enough to learn how to use AJAX. If you watch all the videos you will have a very deep understanding of AJAX and related technologies.

[@CesarJuarezVargas]

Can developers still use any of the three methods? What is the approach with regard to use "old" v. "new" methodologies with AJAX?

[@SteveGriffith-Prof3ssorSt3v3]

Cesar Juarez-Vargas there are just two approaches. The old one that uses XMLHttpRequest and the new way with fetch. Fetch is a better approach but it is not supported by older browsers. Check caniuse.com for support data.

[@rotrose7531]

As always thank you very much.

[@JJ.R-xs8rf]

*_"What is AJAX and Why Should I Care"_* A famous football club from Amsterdam in the Netherlands, 36 times National Champion, 4 times European Champion, 2 times World Champion.

[@hacker2ish]

Could you make more videos on the old way, a.k.a XMLHttpRequest, because fetch is still unsupported for IE11 and Opera Mini, which according to caniuse.com is 5% of Internet users?

[@SteveGriffith-Prof3ssorSt3v3]

Well Opera mini doesn't run Javascript - it uses server-side rendering so it will never support fetch. IE 11 is ~2.5% iOS Safari 9 and 10.2 together account for ~2%. Android 4.x ~1% Android 5.x if they have not done the system updates to update the webview. That makes about 13% of the Android devices which could possibly not support it. However, many of those devices have FF or Chrome installed which would support it. I will eventually make more videos on XMLHttpRequest but I have a lot of new things to cover first. The basic example shown in this video really shows most of what you need to know about it.

[@ahsath]

Hi! could you made a video about history API?

[@SteveGriffith-Prof3ssorSt3v3]

Klein Venedig yep. It's on my list.

[@SteveGriffith-Prof3ssorSt3v3]

I have two videos for the History API now online.

[@miklosnemeth8566]

For professional business applications timeout handling is very important an fetch simply doesnt have it. The good old XMLHttpRequest has timeout handling. Axios is built upon XHR and has timeout support. JQuery ajax has, too. I dont use fetch. The Promise timeout workarounds are not ok, an API has timeout inherently built in.

[@SteveGriffith-Prof3ssorSt3v3]

I still find fetch to be far superior to the old XMLHttpRequest APIs. A timeout is a simple thing to add to any Promise and IMO should not be a reason to stick with XMLHttpRequest. David Walsh has a simple timeout script here - davidwalsh.name/fetch-timeout - which adds a timeout in a few lines without having to add jQuery to a website. I would not bloat any website that I built with jQuery in favour of using the native fetch method. Promises do have an abort mechanism - developer.mozilla.org/en-US/docs/Web/API/AbortController/abort - that can be used to cancel a fetch call.

[@miklosnemeth8566]

@@SteveGriffith-Prof3ssorSt3v3 Thank you very much for the feedback. This AbortController together with the Promise timeout sounds like a solution. What David Walsh wrote is totally useless -- I had been experimenting with the same trick on my own a couple of years ago, too -- but it doesn't prevent fetch to stop its long running job behind the scene. This AbortController, though sounds promising. I'll give it a try. Thank you so much.