Rainer Hahnekamp
@rainerhahnekamp
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Passionate Angular and Spring developer. Trainer and Consultant at .
Austria
Joined October 2008
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Standalone, Signals, Hydration, and more: We are currently witnessing the making of the 3rd generation of
#Angular
. Unlike the switch from AngularJs to Angular, it happens slowly, carefully, and keeping it backwards compatible.
Exciting times to be an Angular developer🎉
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I've become a GDE! That wasn't a one-man show:
Thanks to
@SantoshYadavDev
for triggering the GDE process.
To the community, colleagues, and customers that challenge me and keep me motivated.
My biggest thanks to
@ManfredSteyer
and
@MikeZks
for our daily & fruitful discussions.
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And we are at
#Angular
16.1. Released half an hour ago.
Main features are
- possibility to use fetch in the HttpClient
- transform input values without a setter function
- TypeScript 5.1
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Signals have been marked as stable and came with a last-minute breaking change. The mutate function is no more.
You can read the explanation here:
#Angular
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Something for the weekend?
My article on the Facade pattern in
@ngrx_io
is available at:
It turned out to be a controversial topic, and I've tried to address the counterarguments as best as possible.
Comments are always welcome!
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Performance in web applications is essential to you? Do you need a checklist covering all major areas? Including explanations and in-depth coverage? Look further,
@smashingmag
has it:
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I've finally published my video about the current status of testing in
#Angular
.
I explain Karma's deprecation and the experimental Jest support. I also dive into the Jest integration that many of us have been using so far.
Happy watching!
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Proudly announcing the availability of our (
@MikeZks
,
@ManfredSteyer
) ngrx-toolkit which brings support for DevTools and the Redux pattern to the
@ngrx_io
Signal Store.
It is in an early beta phase. Try it out, give us feedback and expect more features:
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In the past, minor releases of
@Angular
weren't known for their "enormous amount" of new features. Angular 14.1 and 14.2 are different. That's why I've created two new videos where I showcase the main features. Hope you like them!
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If you need to write a unit test in
#Angular
to test only an effect().
This cheat sheet provides a utility function you can use.
It runs the test inside the injectionContext and creates the required dummy component.
Gist available on:
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In case you missed it: I just dropped my second full-stack video! 🎥
I leverage
#OpenAPI
to connect
@springboot
and
@angular
in a typesafe manner. As a bonus, I've thrown in a use case for file uploading. Check it out!
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#Angular
16.2 was released. 🎉
Comes with smaller new features. Guess the biggest one is the possibility of adding input bindings to `NgComponentOutlet`.
Hoped the decoupling of the effect execution from the CD will also make it. Maybe next time 🤞
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We all know that
#Angular
's Signals will not have mutate() in v17.
@eugeniyoz
mentioned another change, which implications I failed to grasp until now.
The following code will not work anymore:
buttonStatus=signal({clicked: false});
prettyStatus=computed(() =>
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In my latest video, I introduce the
@Cypress_io
component test runner for
@angular
and explain why this will be the new way how we write our component tests.
Personally, I've been waiting for this for several months. Really happy that it finally landed.
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#Angular
Community: Do we have a naming pattern for Signals already? We've been discussing this internally and didn't really come up with a final answer.
The $ works quite nicely for an Observable. Why not use something similar for a Signal?
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Last week's
@ngPolandConf
was a milestone for me. Received an award 🏆 for my work on
@_ng_news
. Big shoutout to all the supporters!
Had the pleasure of meeting some fantastic developer buddies, although forgot to snap photos with
@MikeZks
@ManfredSteyer
,
@yjaaidi
@VojtechMasek
.
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I published a video on how to migrate an existing
#Angular
app in v13 to v14 including Standalone Components & APIs, Typed Forms, and Page Title.
Check it out, leave your comments, questions, etc. Source code is of course also available.
Happy watching! 📺
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My main surprise from last week's Angular live event was
@synalx
's clear statement that single-file compilation is a goal for Angular.
This would further open up
#Angular
to the JavaScript ecosystem.
Credits to
@brandontroberts
for asking that question.
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It is decided. The upcoming control flow Syntax in
#angular
will use @ and not go with {.
Looking forward to Angular 17.
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There are different opinions regarding RxJs's future in
#Angular
.
That's why I really appreciate the clarity of Jeremy Elbourn's statement during the Q&A session.
In short, RxJs should become optional in the long-term future.
Recording with time marker
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I have just published a new video: "Cypress and Playwright: A Comparison". 📺
I guess the title says it all...
I'll let you know once the article is ready. So make sure you follow me 😅
@Cypress_io
@playwrightweb
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Excited for my talk this Wednesday, comparing
@Cypress_io
and
@playwrightweb
! I will explore their differences and common ground.
We currently have 479 participants. Would be great if we reach 500. Would be a new record... Just saying ;)
Link:
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Want to merge the strengths of Template-Driven Forms and FormGroup? This cheat sheet includes an example and explanation to help you start quickly.
Repo:
#Angular
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One last rehearsal, and then it is T-4 hours until my talk about
@Cypress_io
Component testing in
@angular
at the
@viennajs
.
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Functional Components in
#Angular
were a big topic last week. I summarised the current status.
They could solve a range of problems that class-based can't. The Angular team will do its research and present the results in an RFC.
Let's be patient and not jump to early conclusions.
This week's episode is fully cramped with high-value content:
-
@mgechev
&
@ngKalbarczyk
: Future of
#Angular
:
- Stable Signals
- Jeremy Elbourn,
@brandontroberts
: Functional Components (double pack)
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Please take the time to watch the latest episode.
The
@Angular
team proves again that even ground-breaking changes like zoneless don't force us to rewrite our applications.
This is one (if not the) main reason why enterprises choose Angular. Long-term protection of investment.
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My video about
#Angular
Standalone Components and their impact on modularity is online. An article will follow as well. Will keep you posted.
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Leaving
@ngconf
with my buddy
@MikeZks
. I've met so many brilliant and talented individuals that I've missed almost all the talks. Will have to watch the recordings later ;)
We're looking forward to our return to the USA in September for the
@JavaScriptCon
in New York.
#Angular
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#Angular
will support
@vite_js
for its ng serve. This is fantastic news.
It opens up Angular for many tools that require a "vite-based" framework, like Vitest or Playwright Component Testing.
And btw. Vite is blazingly fast.
We'll be using Vite for the development server of `ng serve`!
We were keeping this as a surprise announcement, but well...Looks like it got noticed! 🚀
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We've grown up🐣! First time of a public AngularArchitects workshop without
@ManfredSteyer
.
Together with
@MikeZks
, we covered the latest and upcoming
#Angular
features at the
@JavaScriptCon
in NY🗽
Before you ask, Manfred's still with us. So no early retirement 😁
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What happens if you pair a top
#angular
expert like
@ManfredSteyer
with an Angular core developer like
@mgechev
and press record? Right, you'll get a great interview with tons of information. Kudos to
@ngKalbarczyk
for bringing the two together.
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I've discovered the ultimate accessibility guide in one article. Kudos to
@BrowserPerson
for compiling this treasure trove of information. It's a true goldmine!
#Accessibility
#a11y
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T-minus 5 hours until my talk "Signals under the Hood" at the
#ijs
in New York.
I will implement a prototype of the
#Angular
Signals live on stage.
Among other concepts, I want to explain the why and how of the glitch-free effect.
@JavaScriptCon
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This week is quite "heavy" in terms of new Angular-related releases:
Today
#Angular
14.2. Yesterday
#TypeScript
4.8 and
#NgRx
14.3. Hard to keep up with that pace 🙂🥳
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Happy to be finally part of the team. 🤗
📢 Introducing our newest ng-champion
@rainerhahnekamp
! Check out Rainer's article where he dives into Facade Patterns in NgRx and breaks down this powerful tool making it easy to use!
#Angular
#ngconf
👀
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My article on Standalone Components and their impact on modularity in
#Angular
is now available in Spanish. A lot of thanks to
@danywalls
, muchas grazias!
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The possibility to add dependency constraints to an
#Angular
project is reason enough to use
@NxDevTools
.
@meeroslav
explains this feature in detail on
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So if somebody out there is not running on
#Angular
15 yet, here is a motivational video for you.
And if you are already on 15, then check it out as well 😉
I cover responsive images with NgOptimizedImage, provideHttpClient & Directive Comp. API. Cheers
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If you are interested in modularity in your
#Angular
application and want automatic checks, I invite you to join our meetup next week.
Together with
@ManfredSteyer
, I'll introduce a brand new tool.
Don't want to promise too much, but you won't regret it 😀
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Curious about
@playwrightweb
but never had the chance to dive in? Here's your chance.
After two years of hands-on experience, I've put together a video introduction 📺
Enjoy watching, and feel free to share.
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And the survey for "State of JavaScript 2023" is out. I hope that
@Angular
's latest innovations will pay off in the results.
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I highly recommend listening to
@TkDodo
and what he says about Angular Query and state management in general.
And, of course, don't miss
@synalx
comments and talk at
@Angular_Nation
.
Links to both recordings are available in the posting 👇
This week's episode features:
-
@tan_stack
Query landed in
#Angular
. Informative Twitter Space by
@DanielGlejzner
hosting
@TkDodo
,
@tomasz_ducin
et al:
-
@synalx
at
@Angular_Nation
about Signals, Input Setters & Change Detection:
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Want to have a highly modularised monolith instead of
#microservices
? Then this talk from
@simonbrown
at the
#gotocon
is a must-see.
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I will introduce a migration tool for
#Angular
Standalone Components.
1. It analyzes your existing app and generates SCAMs (semi-automatic).
2. Next, it transforms them into Standalone Components.
Join us! The more the better 👍😃
@ManfredSteyer
@MikeZks
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My complimentary article to my talk at the
@enterjsconf
about
#JavaScript
engines is finally online.
Thanks a lot to
@bmeurer
and
@mathias
for their valuable feedback.
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Daniel's RxJs mastery list can be overwhelming for newcomers. Especially when working on frontends with little logic where data is only loaded and sent back.
It proves optional RxJs in
#Angular
is the right way.
Yes, to
#RxJs
. But only for advanced cases. Not by default.
Mastering
#RxJS
is about understanding the core concepts.
Not memorizing all of the operators.
Elevate your reactive game.
• Hot vs. Cold Observables
• Error Handling
• Backpressure & Buffering
• Multicasting
• Schedulers
• Testing Reactive Code
• Core Operators (map,
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My article appeared in the Angular Addicts newsletter. That's a premiere for me. Thanks Gergely!
Check out the 15th issue of the
@Angular
Addicts newsletter: Angular v16.1, Typescript 5.1, new RFCs & more:
@cedric_exbrayat
@drosenwasser
@DanielGlejzner
@ManfredSteyer
@rainerhahnekamp
@chrislydemann
@StefanvHaas
@mgechev
@twerske
@synalx
@marktechson
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Wow, that's a great promotion.
I hope I don't have to wear that suit on stage. Otherwise, we have to postpone to 2024. Have to stop eating 🧑🍳 and hit the gym 🏋️♂️.😁
See you in Salt Lake City!
Come join in-person Lightning Talk Lollapalooza!
@RainerHahnekamp
will give an insightful talk on
#Angular
and Sheriff. Discover how to optimize your app's performance and scalability.
📅June 13, 7PM MDT
🔗
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@goetzrobin
@brechtbilliet
@vestjs
@tim_deschryver
Watch that video.
Ward Bell presented vest and its integration into template driven forms. Afaik, the famous article of
@tim_deschryver
was influenced by that talk as well
Having high hopes in
@brechtbilliet
upcoming one🤗
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We observe Signals becoming increasingly integrated into the
#Angular
framework. With Angular 17.0, Signals introduced Local Change Detection, and with 17.1, we'll also have Inputs as Signals. Way to go!
The new
#Angular
release schedule !
The team expects to release 3 minors in v17.
This should allow several feature to land when they are ready !
Starting with Signal inputs in 17.1 !
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@TheCelavi
Come on Nikola, that's disrespectful.
Yes, you won't get any guarantee, but you have to acknowledge that they are trying hard to move the framework forward and stay backwards-compatible as much as possible.
If you don't touch your code base for years, that's on you.
The point
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As promised last week, my article about Standalone Components in
#Angular
is online. Thanks a lot to
@pkozlowski_os
, the creator of the Standalone Component RFC, for the review.
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Amidst the buzz around Angular 17, I almost overlooked recording this week's episode. Managed to make it just in time! 😅
#Angular
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Now live on stage in Brooklyn at the
@JavaScriptCon
:
@MikeZks
about customizing
#Angular
during the runtime.
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On my way to Salt Lake City and
@ngconf
. Looking forward to meeting new people and, of course, to my two AngularArchitects buddies
@MikeZks
and
@ManfredSteyer
.
See you there!
#Angular
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Huge thanks to
@marktechson
😃 for mentioning us (among others) regarding books and courses covering advanced
#Angular
topics.
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Very happy about that.
It is going to be my first attendance of a DevFest AND I was appointed as a speaker AND it is within walking distance of my apartment. So it's going to be a "Heimspiel" (home match). That's always very special.
Looking forward to it.
🔎 Dive deep into the world of
#TypeScript
applications with expert developer
@rainerhahnekamp
at
#DevFest
#Vienna
2023! Discover Sheriff and master the art of modularity in frontend applications.
#Angular
#WebDevelopment
#TechTalk
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If you attend
@enterjsconf
this week, come and join my talk about JavaScript Engines on Thursday afternoon :)
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Better late than never. The slides from my talk about
@Cypress_io
and the database at
@DECypressUsers
. Article will follow...
Thanks to
@leichteckig
and
@tobmaster
for making this possible.
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6
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100,000 views for my article about the main pillars of learning programming. Thanks a lot to
@freeCodeCamp
and
@Medium
for publishing it and of course thousand thanks to my readers. It really means a lot to me:
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Looking forward (and also proud) to running tomorrow's Angular Architecture workshop together with no one else than
@ManfredSteyer
at
@ngdeconf
.
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@Angular
component testing in Cypress switched from beta to general availability.
If you haven't tried it out so far: Do it now.
You will not regret it. Big promise 👍
Today your tests get an upgrade.
Welcome to Cypress 11! 🎉
Dig into all the exciting upgrades and changes:
#testing
#BrowserTesting
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Just finished rehearsing my 5 minute intro of Sheriff at the
@angular_meetup
at
@ngconf
. And now for real. See you there.
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So the RFC for Signals in
#Angular
was released. That's quite a lot to read. 🥳
But you could also do what I do when it comes to reading: Just wait for the movie 🎥😉
Scheduled for tomorrow:
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Ich habe die Ehre als Programmbeirat für den
#Angular
Advanced Day 🇩🇪 tätig zu sein.
Das Programm deckt die wichtigsten Themen ab. Bestens geeignet für den Start mit Angular 17:
Dabei sind:
@cathrin_moller
: MicroFrontends
@ManfredSteyer
: Architektur &
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Looking forward to this for quite some time now. This is my first time in India.
Hope to make a lot of new acquaintances and to experience and learn about Indian 🇮🇳 culture.
Hello
@rainerhahnekamp
Rainer lives in Austria 🇦🇹 He is a GDE and World Famous Trainer😍
This is the 1st time he is speaking at India's Largest
#Angular
Conference
#ngIndia
To learn and network with him get Early-Bird Tickets 🎫
🗓10 Feb 2024, Delhi
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What an exciting surprise to end the year!
I'm thrilled to be teaming up with
@ManfredSteyer
to host a workshop on architectural topics and advanced concepts of the
@ngrx_io
Signal Store. Can't wait to dive into these fascinating subjects with you all.
See you in Italy!
#Angular
🚀 Exciting Workshop Announcement! 🚀
Join us for the "MODERN ANGULAR ARCHITECTURES" workshop with
@ManfredSteyer
&
@rainerhahnekamp
.
📅 June 26, 2024
⏰ 9 am - 5 pm
📍 In Person - Rome
Register now:
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Looking forward to it. It will be my first time in Poland as well 🇵🇱.
And I'll bring the Sheriff🤠 with me 😁.
We're thrilled to announce the 8th Edition of
@ngPolandConf
- Europe's biggest
@angular
conference! And yes,
@jsPolandConf
is here too!
Workshops: Nov 06, 2023
NG POLAND: Nov 07, 2023
JS POLAND: Nov 08, 2023
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I had the honour of being part of the
#AngularMasterPodcast
. Initially, I was a little bit nervous, but
@ngKalbarczyk
made it so easy that I really enjoyed it.
Thanks!
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5
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You have a lot of
#Protractor
tests and need to replace them? You have been discouraged from writing E2E tests in
#Angular
so far? Then join my talk tomorrow and get to know
@cypress_io
0
5
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Looking forward to my talk at
@DECypressUsers
about integrating
@playwrightweb
into
@Cypress_io
to overcome the constraint of switching super domains. You can expect lots of live coding. If you have time today... see you there!
1
3
13
¡Olé! My article about
#JavaScript
engines has been translated to Spanish!! Many thanks to
@campusMVP
and especially to
@jm_alarcon
You can read it on
1
6
13
As a
@Cypress_io
dev, do you struggle in structuring your tests so that they don't influence each other? If yes, you want to join my talk today at
@DECypressUsers
. And if not, you should join as well. Just to be prepared ;). The talk will be in English.
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@mgechev
Dear Minko, I’m sorry for holding a different perspective on this matter.
I view it more as an academic discussion, and when I introduce the concept of change detection, I find it effective to start with the term "rendering model/process." This approach helps ensure that
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So it begins... Protractor for
#angular
will be deprecated. What is the successor? Quite obvious if you look at the stats. More than 60% of Angular developers are already using
@Cypress_io
and it has always been the default e2e tool in nx.
📣 New Request For Comments 📣
Earlier this year we ran a survey on e2e testing solutions – and we took action!
We are working with the community on e2e testing integrations & guidance for moving to modern solutions.
Head to GitHub to provide feedback ↓
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Something for the weekend? I've just published my video about Type Narrowing in
@typescript
If you want to write fully type-safe code, there is no way around type narrowing.
Happy watching and have a nice weekend!
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There is a possibility that *ngIf, *ngFor and *ngSwitch might be gone quite soon. That automatic and safe migration script might be the key here.
Stay tuned.
#Angular
HELLLLL YEAHHHH 🎉🎉🎉
The schematics that migrate code from directive based control flow to the new template syntax 🚀
#angular
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And as it is already tradition,
@ngrx_io
is one of the first libraries which makes the upgrade to 17.
This time though, we also have with the signal store a completely new state management library, built up on Signals from the very ground.
Let’s see how it is going to be adopted!
NgRx v17 is out!
NgRx Signals, Operators, Performance Improvements, Workshops, and more!
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Although this is not the official announcement of Angular's release, I find it the more detailed one.
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Curious about white-labeling and customizing patterns in
#Angular
? Then join our Online Meetup today. It will be in English 🇺🇸🇬🇧 and - as a bonus - you'll also learn something about Austrian cuisine. See you there!
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Proudly announcing my German article about JavaScript Engines on . Thanks a lot to
@heisedc
for publishing it.
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@spierala
No, although Nx provides the best Jest integration you can get, I am not happy at all. I'm actually in the process of migrating back to Jasmine. I am planning to come up with an article explaining the reasons.
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@Enea_Jahollari
For me, it was
@wardbell
's talk at
@ngconf
that got me into template-driven forms. Especially with large applications, you need an additional validation lib. Hence Reactive Forms lose their main advantage.
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