What we're about

PragueJS is a group of rising JavaScript enthusiasts who meet every month in a different place, to discuss all the cutting edge trends and tweaks in JavaScript and related topics. And hey, there's beer, so you can come even if you don't know jack about JS. Almost all talks have been recorded and published on our Youtube channel (https://www.youtube.com/channel/UC35c9cDvXa4zDNq_uJXufTQ).

Upcoming events (1)

2022 #8 It works on my machine!

Needs a location

Get out and get social in 2022 : come out and discuss JS together!
Get in touch with the organizers with any questions you have. We welcome a diverse range of topics that are related in any way to JavaScript and the community around it.
Also, be sure to sign up for our newsletter here on meetup.com to be notified when new events are announced.
Talks from previous meetups can be found on our YT channel: https://www.youtube.com/playlist?list=PLhkTsdQVsKvN_TNQ_LZz_-LZzRLSlzKWh

Venue schedule:

18.30 - door open
18.45 - talks kick off
20.45 - talks done
21.00 - beer time


Hold my Context! (EN)
Miroslav Bajtoš

Preserving contextual data across asynchronous calls has always been tricky in Node.js land. For example, how to pass information about the current user or a correlation (transaction) id from the code processing incoming HTTP requests to the code calling a backend web service? Traditional runtimes like C and Java can utilize thread-local storage, which does not work for Node's single-threaded event loop.

The talk will describe different solutions people have been using (and abandoning) over the past 8+ years, dive into the history of domains and async hooks, and explain what's so difficult about context keeping. Finally, I'll discuss the AsyncLocalStorage API stabilised in Node.js 16 and show how to use it in practice.

Our sponsors:

Pricefx is fast, flexible and friendly SaaS price management and price optimization solution, based on the latest in native cloud technologies. Perfect for enterprises of any size, we serve over 90 global clients like Bosch, MediaMarkt, across a variety of industries.

SessionM is a customer data and engagement platform empowering the world’s most innovative brands that forges stronger and successful customer relationships. We put data at the heart of engagement.

Past events (32)

2022 #7 Goodbye summer party

Needs a location

Photos (139)