JavaScript

Eric Seppanen will host a workshop to create your own rusty logo, using home chemistry to turn shiny steel into an oxidized work of art. Note: it will take an extra day for the finish to dry, so please ensure you will be around to pick up your rusty logo the next day. This workshop is held at Kinepolis (the conference venue) and is free of charge for RustWeek attendees. Looking for more fun things to do during RustWeek? Take a look at our activities page: [https://2026.rustweek.org/events/social-activities/](https://rustweek.org/events/social-activities/), or join our Discord at https://discord.gg/FSwaWZdk6k if you have questions!

RustWeek 2026 is a major Rust community event taking place May 18–23, 2026 in Utrecht, Netherlands. The event includes: \- A 2\-day conference \(May 19\-20\) \- Optional workshops \(May 18\) \- Unconf and community days \(May 21\-23\) Ticket Prices: \- Individual: EUR 237\.50 \- Employer\-paid: EUR 500\.00 \- Student: EUR 37\.50 \(limited availability\) Online Attendance: This is primarily an in-person event. No free online streaming option has been announced. Attendance requires travel to Utrecht, Netherlands. More info and tickets: https://2026.rustweek.org/

Tijdens de maakavonden van Meet Je Stad soldeer je je eigen meetkastje dat temperatuur, luchtvochtigheid en fijnstof\* kan meten. Het solderen is geschikt voor iedereen: van beginner tot expert! Daarnaast bieden we begeleiding, dus hoef je niet bang te zijn dat je er niet uit komt. Ter deelname betaal je €15 voor de materialen. Vaak lukt het niet om al het soldeerwerk binnen één avond af te krijgen, maar dit is geen probleem; tijdens onze volgende maakavonden kun je langskomen om je werk af te maken. Inmiddels zijn er in de stad Utrecht nu zo’n 150 mensen die hun eigen meetkastje hebben gesoldeerd. Als je kastje af is wordt hij geregistreerd en kun je hem bij jou thuis ophangen/neerzetten. Hierbij krijg je instructies zodat je de juiste locatie kunt kiezen en je metingen zo betrouwbaar mogelijk zijn. Als het dan eenmaal hangt kun je via de kaart op de [website van Meet Je Stad](https://meetjestad.net/index3.php?loc=Tb) bijhouden welke metingen je kastje neemt: zo kun je bijvoorbeeld zien op welke momenten het bij jou het warmst is en vergelijkingen maken met waardes van andere meetkastjes. Dat kan door middel van [deze tool](https://mjs-datavisualisation-fez7kynngq-ez.a.run.app/) die je helpt om grafieken te maken. Dan kan je er achter komen hoe jouw omgeving ervoor staat in vergelijking met de rest van de stad. Meet Je Stad organiseert ook kennisavonden met gastsprekers die vertellen over hitte, fijnstof en andere burgerinitiatieven in de stad. Dit zijn ook gelijk geschikte momenten voor deelnemers om met elkaar in discussie te gaan over hun metingen en ondervindingen. Zo hopen we een netwerk van betrokken inwoners te creëren en meer te weten te komen over de milieuomstandigheden in de stad! *\*De fijnstofsensor is optioneel en kost 20 euro extra. Indien je deze bij je meetkastje wilt moet je deze via een draad met een stroombron binnen 15 meter kunnen verbinden.* **Organisatie:** Milieucentrum Utrecht (MCU) in samenwerking met de Makerscommunity HaHaHo. **Locatie:** Bibliotheek Neude, Huis van Actief Burgerschap (begane grond) **Kosten:** 15 euro voor materiaalkosten, 20 euro extra voor fijnstofsensor. (Meet-up suggereert bij het aanmaken van een account dat een betaald abonnement vereist is. Dit is niet zo, op de pagina waar gevraagd wordt om een abonnement te kiezen staat rechts bovenin de optie "Ga door met het gratis plan".) *Bij te weinig aanmeldingen kan de workshop afgelast worden.*

Please join us for an evening of all things Umbraco - the latest news, community chat, and a talk or two! For 2026, we will be running both in-person and virtual meetups, alternating every month. For those who can't join in person, virtual attendance is available too, so you can join us no matter where you are! This month, we have **Owain Jones** talking about building friendly content editing experiences and **Markus Johansson** talking about building packages for Umbraco. **Owain Jones - Unlocking the Full Potential of Umbraco: Building Friendly Content Editor Experiences** Umbraco is often called "The Friendly CMS", and it absolutely can be when we, as developers, make the most of what it offers. In this talk, I’ll show how we can utilise Umbraco’s built-in features and community packages to build intuitive, efficient, and friendly experiences for content editors. **Markus Johansson - Extending Umbraco like a Swede** In this talk, Markus will share his learnings from over 15 years of extending Umbraco. We’ll get a brief overview of the possibilities introduced with the new backoffice “Bellissima”. He’ll also give us tips and tricks that is useful both when extending Umbraco for a specific project or publishing a package for the Umbraco Marketplace. There will also be food, drinks and some friendly socialising. What's not to like? 😄 Whether you are an Umbraco novice or a seasoned developer, this is your chance to meet like-minded people to talk about our favourite friendly CMS! No matter what your role is there will be something to learn and your chance to meet other members of the Umbraco community from Kent and the surrounding areas. Venue The meetup will be at Dragon Coworking in Rochester (7-8 New Road Avenue, St George's Hotel, Rochester, ME4 6BB), a short walk from Chatham train station and with free on-site parking. If you wish to use the car park, please access via Gundulph Road, Rochester, ME4 4ED. You can then use the steps between buildings to access the entrance. If the car park is full there is on road parking available, but please check the parking restrictions. On arrival, please make your way to St George's Hotel reception (where you access Dragon Coworking) and one of the organisers will come and collect you. **Please note: Do not bring bananas, nuts or pineapple into the coworking space as there are members with allergies.**

Time for our biweekly peer Satsang gathering! This is an open, equal and low-key gathering for spiritual seekers from all walks of life to get together, talk, feel connected and grow. The gathering will last for about two hours. Bring questions, thoughts, or just your presence. We'll see what unfolds once we're there. If you're interested but can't make the currently indicated time, the event is full or you have any other questions, get in touch with me at thijshugenholtz@gmail.com and we'll see what we can do! Location: Buurtcentrum Hart van Noord, Trumanlaan 60 Utrecht but the entrance is opposite Geallieerdenlaan 24

If you are living in The Netherlands, by now, you may well have noticed the amount of open water. If you enjoy cycling in the city, you may wish to feel safer as you navigate the bridges and canals. And you may also want to get ready for visiting the beach, pools or the many lakes this summer. Learning how to swim takes approx 1 year and it all starts with the very first lesson. New comers enroll via our website and pay € 30,50, this is the first lesson and a goody bag. After the class you agree with the personal swim coach how to continue to obtain your final objectives. Enrolling is only possible via [www.your-personal-swim-coach.nl ](https://www.your-personal-swim-coach.nl/)hence a rvsp via meetup is not enough.

A great ride along the Vecht and Gein rivers. You will love this route. Please ride single file along the winding river as there can be cars around each corner. **Route:** https://connect.garmin.com/modern/course/441606271 GPX: https://drive.google.com/file/d/17-T_pT_GH3QKSFcH1WWgfArvxSdAkVzO/view?usp=sharing **Afterwards:** Drinks at Polder https://maps.app.goo.gl/tbt5DDG7YLU3uWvaA **Rules:** \- Download the route to your cycling computer so you can always find your way home \- Make sure to arrive on time \- Before you ride\, decide as a group how you want to ride: you can split up in a fast and a slow group or stay together\, but make sure to discuss what pace you are going to ride and whether you are going to wait if someone is slower than the group\, or not\.

👋 Hey-hey, AmsterdamJS Community! Join us for a special edition of the meetup featuring TC39 members — the people shaping the future of JavaScript. A great chance to hear directly from them and get insider insights into where the language is heading. **📅 Date:** May 21, 2026 📍 **Location**: JetBrains N.V., Terrace Tower, Gelrestraat 16, 1079 MZ Amsterdam, 3rd floor. **🤝 Hosted by** [JetBrains](https://www.jetbrains.com/) JetBrains creates intelligent software development tools used by over 15 million professionals and 88 Fortune Global Top 100 companies. Its lineup of over 30 products includes IDEs like IntelliJ IDEA and WebStorm, an IDE for JavaScript, TypeScript, and related technologies, AI tools such as Junie, Mellum, and JetBrains Central, and team solutions like YouTrack, Qodana, and TeamCity. JetBrains also created Kotlin, used by over 2.5M developers worldwide. **🤝 Supported by** Organizational support from [GitNation](https://gitnation.com/), the go-to software engineering events you can't miss. Check out [upcoming events](https://gitnation.com/events), including [React Summit](https://reactsummit.com/) and [JSNation](https://jsnation.com/), in June in Amsterdam. **🕑 Event Schedule** 18:00 - Doors open – snacks, drinks, networking 18:30 - Intro and announcements **18:35 - [Nicolo Ribaudo](https://github.com/nicolo-ribaudo) \- Fine\-Tuning Native ESM Performance** **19:00 - [Mikhail Barash](https://github.com/mikbar-uib/) and [Alberto Tontoni](https://github.com/tontonialberto/) \- An IDE for Reading and Navigating the ECMAScript Specification** 19:30 - Break with drinks and snacks **19:45 - TC39 Panel** 20:30 - Networking **🗣 Call for Proposals** Have an idea or story to share? Submit your talk proposal through our [CFP form](https://github.com/GitNation/meetups/issues/new?template=talk-proposal.yml) and take the stage at one of our upcoming meetups! 🗣️ **Talks** ➡️ **[Nicolo Ribaudo](https://github.com/nicolo-ribaudo) \- Fine\-Tuning Native ESM Performance** *TC39 is working on two proposals, import defer and export defer, whose goal is to allow developers to extract better performance from native ESM, both in the browser and on the server. Let's go together through how they work, and when and where you'll be able to use them!* ➡️ **[Mikhail Barash](https://github.com/mikbar-uib/) and [Alberto Tontoni](https://github.com/tontonialberto/) \- An IDE for Reading and Navigating the ECMAScript Specification** *Hi. We will present an experimental IDE for navigating the ECMAScript specification document. The IDE provides a custom pseudocode notation that matches the look-and-feel of the ECMA-262 spec, and supports the usual features (outline view, go to definition, find usages, diff). We'll also demo functionality for advanced navigation and comprehension of pseudocode, such as pattern-based code search within the spec's algorithms, and local refactoring/modifying/annotating the spec for learning purposes.* — **👍 Code of Conduct** By registering for this event you agree to comply with our [CoC](https://portal.gitnation.org/coc) **📩 Contact** hi@jsnation.com [https://twitter.com/thejsnation](https://twitter.com/thejsnation) [https://www.youtube.com/JSNation](https://www.youtube.com/JSNation) [https://bsky.app/profile/jsnation.gitnation.org](https://bsky.app/profile/jsnation.gitnation.org)

(english/german below) **Bitcoin Pizza Dag!** Op 22 mei 2010 betaalde programmeur Laszlo Hanyecz 10.000 BTC voor twee pizza's — de eerste gedocumenteerde aankoop met bitcoin. Hij plaatste een bericht op een forum waarin hij BTC aanbood voor pizza; een andere gebruiker ging akkoord, bestelde de pizza's en leverde ze af. Die transactie werd later bekend als "Bitcoin Pizza Day". Laszlo bewees dat Bitcoin als ruilmiddel gebruikt kan worden. **Sluit je bij ons aan voor pizza-avond bij De Pizzabakkers! (vanaf 18:00)** RSVP zo snel mogelijk; we moeten reserveren bij De Pizzabakkers en er is beperkte plek. Zorg dat je je geladen Lightning-wallet meeneemt! *** **English: Bitcoin Pizza Day!** On May 22, 2010, programmer Laszlo Hanyecz paid 10,000 BTC for two pizzas — the first documented purchase using bitcoin. He posted on a forum offering BTC for pizza; another user accepted, ordering pizzas and delivering them. That trade later became famous as "Bitcoin Pizza Day," Laszlo proved that Bitcoin can be used as a medium of exchange. **Join us for pizza diner at De Pizzabakkers! (from 18:00)** Please RSVP as quick as possible as we need to make a reservation at De Pizzabakkers and there is only limited space. Be sure to bring your loaded lighting wallet along with you! *** **Deutsch: Bitcoin Pizza Tag!** Am 22. Mai 2010 zahlte Programmierer Laszlo Hanyecz 10.000 BTC für zwei Pizzen — der erste dokumentierte Kauf mit Bitcoin. Er postete in einem Forum und bot BTC für Pizza an; ein anderer Nutzer akzeptierte, bestellte die Pizzen und lieferte sie aus. Dieser Tausch wurde später als "Bitcoin Pizza Day" bekannt. Laszlo bewies, dass Bitcoin als Tauschmittel verwendet werden kann. **Begleite uns zum Pizza-Abend bei De Pizzabakkers! (ab 18:00)** Bitte antworte so schnell wie möglich; wir müssen bei De Pizzabakkers reservieren und es gibt nur begrenzten Platz. Nimm unbedingt deine geladene Lightning-Wallet mit!

Donderdag 21 mei 2026 is het weer tijd voor onze Techday: hét vaste moment waarop we kennis delen, elkaar inspireren en nieuwe ideeën direct in de praktijk brengen. Deze editie pakken we het aan als een conferentie in het klein. Drie sprekers, drie verhalen, één middag – drie verhalen voor de prijs van één. Wat kun je verwachten? **Dirk neemt een kijkje onder de motorkap van AI** AI voelt voor veel mensen als magie. In deze talk probeer ik de magie weg te nemen door een kijkje te nemen onder de motorkap. Een essentieel bouwblok van moderne AI is een neuraal netwerk. Als je begrijpt hoe een neuraal netwerk werkt, is het een stuk makkelijker om te begrijpen hoe en waarom een LLM werkt. De beste manier om iets te begrijpen is door het te bouwen, vanaf scratch. Dus dat gaan we in deze talk doen. Door dat te doen leren we over artificial neurons, activation functions, backpropagation en meer. **George vertelt hoe AI Cyberaanvallen verandert** George Schizas (extern), voormalig IT Manager, nu werkzaam als CISO, vertelt over zijn ervaringen in de Cloud Cyber Security en hoe hackers met behulp van AI nieuwe aanvalsmethoden kunnen gebruiken om kwetsbaarheden op te sporen en te exploiteren. Hij geeft voorbeelden van manieren om in Kubernetes omgevingen in te breken en noemt manieren om dit tegen te gaan. **Roland duikt in de wereld van de fraude fabriek** Als ontwikkelaar kom je dagelijks in contact met technologie en de laatste jaren natuurlijk ook vaak met AI. JIJ snapt heel goed wat de voordelen en de gevaren zijn, maar hoe leg je complexe onderwerpen als AI gegenereerde afbeeldingen, Voice Phishing en Hallucinaties uit aan je ouders, de buurvrouw, of je kinderen? Ik neem jullie mee in een realistische situatie waarin Anna en haar familie opgelicht wordt met behulp van verschillende technieken en hoe dit oplichters-landschap met behulp van AI verandert. **Wanneer:** Donderdag 21 mei 2026 **Wat:** Techday – conferentie-editie “AI kansen en valkuilen” **Voor wie:** Iedereen (!) die nieuwsgierig is en wil leren **Agenda** 14:45 - 15:00 - Inloop 15:00 - 16:00 - Neurale netwerken 16:15 - 17:15 - AI risico’s en kansen 17:15 - 18:00 - Eten 18:00 - 18:45 - Fraude fabriek We zien je graag op de Techday!

\# This meetup is around a third\-party organizer\, Focus Filmtheater\. You can either purchase your ticket online or right before the session\. **Seats are numbered**. # **Title**: The President’s Cake **Language**: Arabic **Subtitles**: English **Length**: 106 min **Director**: Hasan Hadi **More info**: https://www.focusarnhem.nl/agenda/english-subs-the-presidents-cake/ **Ticket link**: https://www.focusarnhem.nl/tickets/144299/ **Synopsis:** In poverty-stricken 1990s Iraq, young Lamia is selected to prepare a cake for the President’s birthday. Because basic ingredients are hard to find, Lamia goes on a journey in search of eggs, flour and sugar. It becomes a tender, tragicomic odyssey, offering a child-eye’s view of life under authoritarianism. Hasan Hadi’s affecting debut feature follows 9-year-old Lamia. She is tasked with bringing a cake to school for the President’s mandatory birthday celebration. Against a backdrop of crippling poverty and food shortages, she journeys from her marshland home to a nearby city in search of ingredients. Coming along with her are her grandmother Bibi, her best friend Saeed and her beloved pet rooster Hindi. Shot on location in Iraq with nonprofessional actors, this tender, tragicomic odyssey offers a poignant child’s-eye view of life under authoritarian rule. The film was inspired by Hasan Hadi’s childhood memories of 1990s Iraq under Saddam Hussein, and was awarded the Caméra d’Or at Cannes for best first feature. **How it works**: I will be at Focus around 18:30, where we can meet before the movie starts. You can message me to find us. Screening starts at 19:00. After the movie, we can have a drink together. Hope to see you soon!

**RSVP here via EventBrite [here](https://www.eventbrite.nl/e/you-and-your-brand-a-casual-networking-hour-tickets-1984283125243).** Expand your visibility. Join a casual online time to share about you, your brand and business, and learn more about other business owners, locally and globally. Share upcoming events and workshops, too. After each business owner gets the spotlight to share, we then move into a topic-oriented discussion. This month, the topic is begin chosen by [Isabella Maria Noguera, MSc](https://www.linkedin.com/in/isabellamarianoguera/) over of Be Your Brand Consulting. Every session closes with gratitude and a creative activity, so have a pen and paper, tablet, or something available in case we write/create/draw. **RSVP here via EventBrite [here](https://www.eventbrite.nl/e/you-and-your-brand-a-casual-networking-hour-tickets-1984283125243).** *-* *\*\*\*The only requirements are a minimum age of 18 years old, be a business owner or preparing to launch,* *and **at least three attendees** register to make it a worthwhile hour for everyone.\*\*\**

Come along, lovely queer hikers! 🌿✨ This time we’re serving an easy-going queer nature moment with a short loop through **Landgoed Heidestein** near Zeist. Think dreamy forest paths, shimmering fens, a peaceful forest pond, and heather fields - a lot of diversity for such a short walk :) We’re teaming up with **Cocktail (COC’s group for LGBTQIA+ refugees & asylum seekers)** for this event, so besides soaking up nature, we’re creating space for connection, sharing stories, and learning from each other’s journeys and experiences. Expect a vibe that’s part hike, part picknick, part wholesome community exchange. 🌈 Bring your snacks and blankets, as we’ll pause along the way for a relaxed picnic moment together. Because queer joy isn’t just about where we go, but who we walk with. 💖 **Practical info** 📏 **Distance:** 5 or 7 km (loop walk) 📍 **Start:** Bus stop Prinses Margrietlaan, Zeist (5km option) Driebergen-Zeist station (7km option) 🏁 **End:** Back at the starting point 🥾 **Level:** easy - chill pace 🤝 **Meeting point:** outside the train station **Driebergen-Zeist at 13:45** or bus stop **Prinses Margrietlaan (Zeist) at 14:20** ❗You’re welcome to join from another direction. If you come by car you can park at P+R Driebergen-Zeist. Please note: we published this hike with Cocktail simultaneously, which is also why we lowered the participant number from Hiking Queer NL's side. Pack your: 🍱 snacks 🚰 water 🧥 rain coat/umbrella ☀️ sun screen 🏳️‍🌈 anything else you might need ❌ If you signed up and cannot make it in the end, please cancel your RSVP attendance so we know how many people will show up and someone else can take your place instead. 💗 A voluntary donation helps us to keep the Meetup group up and running :) you can either pay via a Tikkie or in cash after we finish the hike. *Hiking Queers Netherlands & Cocktail (COC)*

NOVA Code and Coffee is an inclusive, informal, co-working session. People of all skill levels are invited. The concept is simple, bring a laptop and ideas, we'll provide the coffee and donuts! Here's how it works: 1. At 10:15 everyone introduces themselves and briefly describes what brought them to Code & Coffee today (project, homework, networking, etc) 2. For the rest of the day, folks work in the communal space on their projects providing one another help and conversation as needed. Oh and they usually drink coffee and tea too! That's it! Hope to see you there! **Location** Our hosts are the Fairfax City Economic Development Building: [10300 Eaton Pl, Fairfax, VA 22030](https://www.bing.com/ck/a?!&&p=d7298231ca2df594df822003f9a93517c788fceefe1fcbb79c8976696e341bc6JmltdHM9MTc1MzIyODgwMA&ptn=3&ver=2&hsh=4&fclid=180d0745-3b7f-69a1-23a2-11433a7868e5&u=a1L21hcHM_Jm1lcGk9MTA5fn5Ub3BPZlBhZ2V-QWRkcmVzc19MaW5rJnR5PTE4JnE9RmFpcmZheCUyMENpdHklMjBFY29ub21pYyUyMERldmVsb3BtZW50JnNzPXlwaWQuWU44NzN4ODI4MTk2Mjg0NTk5MDM4MTU0MiZwcG9pcz0zOC44NjE0NDYzODA2MTUyMzRfLTc3LjMwMjE3NzQyOTE5OTIyX0ZhaXJmYXglMjBDaXR5JTIwRWNvbm9taWMlMjBEZXZlbG9wbWVudF9ZTjg3M3g4MjgxOTYyODQ1OTkwMzgxNTQyfiZjcD0zOC44NjE0NDZ-LTc3LjMwMjE3NyZ2PTImc1Y9MSZGT1JNPU1QU1JQTA&ntb=1) Conference Room A- Large, Floor 1 This is a new venue for us, so give us some time to get more details about it. Driving is the best option. There is plenty of free on-site parking. Otherwise, we are a 22 minute bus from the Vienna Metro Station. Bicycling from Vienna is possible but difficult, though once you are here, there's a bike rack in the garage behind the building, and there's also a Capital Bikeshare dock 15 min walk away. **Sponsored by:** Thank you [Fairfax City Economic Development](https://gofairfaxcity.com/) and [Mason Enterprise Center](https://enterprise.gmu.edu/) for making this event possible! **Thank you so much to our wonderful sponsors!** Organized by [DMV Petri Dish](https://www.dmvpetridish.com/) **[Code of Conduct](https://github.com/NoVACodeCoffee/admin/blob/master/code-of-conduct.md):** We value the participation of each member of the community and want all attendees to have an enjoyable and fulfilling experience. To make clear what is expected, all delegates/attendees, organizers, and volunteers at any Nova Code & Coffee events are required to conform to our [Code of Conduct](https://github.com/NoVACodeCoffee/admin/blob/master/code-of-conduct.md).

This is a MUST for true crime lovers. This will be my fifth year going and I love every second of it. Crime Con is a three-day true crime festival with podcasters, speakers, celebrities, and advocates from all over the world. Each day is full of speakers, demos, live panels, and much more. [CRIMECON 2026](https://www.crimecon.com/CC26)

We’re still working to get more people into these Meetups, but our goal is to give PlayYourCourt members a few social tennis outings each week in addition to your practice sessions and Challenge League matches. These Meetups are co-ed, super laid back, and all skill levels are welcome. Post your skill level and a suggested court in the comments section so we can round up as many players as we can for some tennis fun! Also, if you’re looking to meet new practice partners or play some matches and you aren’t already in the PlayYourCourt Community, you can go here to see what we’re all about and sign up: https://www.playyourcourt.com/tennis-community/leesburg-va/meetup/ If you love tennis, we’d love to have you! Be sure and watch the quick video that explains how everything works. Happy hitting! - Scott

踏入《广论》研讨班，对许多人来说是开启生命转变的契机。或许您也会好奇：在繁忙的工作与生活之余，投入时间研读佛典，究竟能为人生带来哪些实质的成长与收获？ 《广论》研讨班秉持着日常老和尚以心灵提升、圆满生命的目标，提供大众身、心、灵健康的学习环境与循序渐进的佛法课程。学员通过听师父的录音带和研讨交流，对佛法建立整体认识，全面的理解，同时学习如何将佛法智慧运用于生活中，打造幸福人生。 **《菩提道次第广论》简介** 佛法大全，给与您心灵滋养，人生方向 次第井然，引领您脚踏实地，步步向上 心智科学，帮助您认识自己，了解他人 幸福教育，教会您正确取舍，离苦得乐 生命教育，陪伴您创造希望，走向美好