proposal-observable
RxJS
proposal-observable | RxJS | |
---|---|---|
12 | 98 | |
3,036 | 30,218 | |
0.2% | 0.5% | |
0.0 | 8.8 | |
over 4 years ago | 11 days ago | |
JavaScript | TypeScript | |
- | Apache License 2.0 |
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proposal-observable
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Proposal: Signals as a Built-In Primitive of JavaScript
https://github.com/tc39/proposal-observable
And there's the new one which seems to be getting implemented in node right now:
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Observable API Proposal
How does it differ from <https://github.com/tc39/proposal-observable/>?
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The Truth about Svelte
I think it is a shame that the Observable proposal [1] still seems somewhat stuck in Stage 1. It's a better idea than just raw event emitters because of composability (if no other reason). Making Observables "first class" could go a long way to unifying a lot of reactivity patterns in various frameworks, in theory at least.
To be fair, Observables and especially Observable composition has a rough learning curve and many frameworks like Svelte intentionally prefer implict reactivity and avoiding things like explicit Observables because they are seen as too complex/"too hard" for the average developer.
(Then you get awful worst of both worlds frameworks like Angular that sort of rely on Observables but yet also don't trust teaching Observables and wind up with code that isn't properly Observable and so also has all the code for implicit reactivity and is full of nasty escape hatches that cause all sorts of composition problems and unnecessary side effects.)
[1] https://github.com/tc39/proposal-observable
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💡 Observable Mutable Wrapper Object
Uses an interface described in the TC39 observables proposal
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Example of Asynchronous programming using Observer pattern vs Promise
JavaScript doesn't have any built-in observables (addEventListener is part of the DOM API specific to browsers) though there is an old observable proposal collecting dust. I think ReactiveX (RxJS) is pretty much the go-to for any kind of observable functionality you may want. That may be a good place to start to really see what observables can do.
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JavaScript Evolutsiyasi Qisqa Satrlarda!
Observablelar streamlarga asoslangan reaktiv dasturlash paradigmasini olib kiradi JSga. Shaxsan menga eng yoqqan takliflardan biri. Bu haqida ham alohida maqola yozish niyat bor. RxJS (Angular) bilan ishlab ko'rganlar bo'lsa buni nimaligini juda yaxshi tushunishadi, endi bu library emas balki native 🚀 !!!
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4 Ways to Handle Async Operations in Javascript
Observable is an object that takes a stream of data and emits events over time to react accordingly. There is a talk to add it to the ECMAScript standard and its proposal is here. Till now it is not part of the ECMAScript standard so to use it, you have to use a third-party library and the well-known Reactive Extension in Javascript is RxJs.
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Reactive Programming
Well, the answer is surprisingly no. But, there is an active tc39 proposal going on around for a while, didn’t find it much active though, you could watch out here — https://github.com/tc39/proposal-observable
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Why do we need rxjs library as JavaScript is reactive by default?
RxJS is an implementation of observables which do not exist natively in JavaScript. There is a proposal for adding observables to the language, but it's only stage 1 and hasn't been active for years.
- Query Engines: Push vs. Pull
RxJS
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Episode 24/13: Native Signals, Details on Angular/Wiz, Alan Agius on the Angular CLI
Similarly to Promises/A+, this effort focuses on aligning the JavaScript ecosystem. If this alignment is successful, then a standard could emerge, based on that experience. Several framework authors are collaborating here on a common model which could back their reactivity core. The current draft is based on design input from the authors/maintainers of Angular, Bubble, Ember, FAST, MobX, Preact, Qwik, RxJS, Solid, Starbeam, Svelte, Vue, Wiz, and more…
- Episode 24/09: Testing without TestBed, SSR & Hydration
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10 Reasons for MiniRx Signal Store
RxJS is used for events and asynchronous tasks
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Top 10 Things to Add to Your Angular App Coding: A Recipe for Programmer Success
Data flowing like a melody? Master RxJS, the reactive JavaScript library, to handle asynchronous data flows with grace and ease. Streamlined data, happy code.
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What We Need Instead of "Web Components"
> This proposal makes the same mistake as various stream implementations (including RxJS in the past) of making operators methods on the observable.
I don't think they are making a mistake. I am sure Ben knows what he is doing, given how it was he who refactored rxjs 5 with all operators being methods on the Observable, to rxjs 6 with pipeable operators.
But, their objective is not to bring rxjs into the browser, but rather to bring the Observable primitive into the browser. And, like Array prototype, which has methods, Observable, in order to be even minimally useful, needs some methods, which they modelled from TC39 iterators, for the sake of consistency.
They say:
> We expect userland libraries to provide more niche operators that integrate with the Observable API central to this proposal, potentially shipping natively if they get enough momentum to graduate to the platform. But for this initial proposal, we'd like to restrict the set of operators to those that follow the precedent stated above, similar to how web platform APIs that are declared Setlike and Maplike have native properties inspired by TC39's Map and Set objects. Therefore we'd consider most discussion of expanding this set as out-of-scope for the initial proposal, suitable for discussion in an appendix. Any long tail of operators could conceivably follow along if there is support for the native Observable API presented in this explainer.
As to
> We really need a `pipe` operator, at minimum
Maybe we don't. Note that in RxJS version 8, they have introduced a new way of piping observables, which is the rx function [0]. Maybe they are thinking of something similar for the browser. Or maybe they are thinking of using the native pipeline operator if it ever gets approved.
In the meantime, for any complex manipulations on observables, users will probably still import relevant functions from libraries.
0 - https://github.com/ReactiveX/rxjs/issues/7203
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Want to raise the bar 💯
Hello and welcome! It's fantastic that you're looking to broaden your expertise in front-end development. Transitioning from Flutter to React and Angular is a great move, as it will provide you with a well-rounded skill set. ### Resources for Learning React: 1. **Official Documentation:** Start with the [official React documentation](https://reactjs.org/). It's well-written and comprehensive. 2. **React Fundamentals Courses:** Platforms like [freeCodeCamp](https://www.freecodecamp.org/) and [Codecademy](https://www.codecademy.com/) offer free React courses. 3. **React Hooks:** Understand the concept of hooks, a powerful feature in React. The [React Hooks documentation](https://reactjs.org/docs/hooks-intro.html) is a great resource. 4. **Project-Based Learning:** Build small projects to apply your knowledge. You can find ideas on platforms like [GitHub](https://github.com/) or [CodePen](https://codepen.io/). 5. **React Router:** Learn how to handle navigation in React using [React Router](https://reactrouter.com/). ### Resources for Learning Angular: 1. **Official Documentation:** Similar to React, start with the [official Angular documentation](https://angular.io/). 2. **Angular Tour of Heroes:** This is a hands-on tutorial provided in the Angular documentation. It's an excellent resource for getting started. 3. **Angular University:** [Angular University](https://angular-university.io/) offers comprehensive courses on Angular. 4. **RxJS:** Learn about reactive programming using RxJS, which is heavily used in Angular. You can find resources on the [official RxJS documentation](https://rxjs.dev/). 5. **Build Real-World Apps:** Build practical applications to solidify your understanding. The more you code, the better you'll become. ### Making a Mark in the Open-Source Front-End Space: 1. **GitHub Contributions:** Contribute to existing open-source projects. This not only helps you learn but also establishes your presence in the community. 2. **Create Your Projects:** Start small with your open-source projects. Share them on GitHub, and seek feedback from the community. 3. **Participate in Hackathons:** Join online hackathons or coding challenges. They're great for learning and networking. 4. **Follow Blogs and Newsletters:** Stay updated with the latest trends and best practices in the front-end world. Subscribe to newsletters like [JavaScript Weekly](https://javascriptweekly.com/) or [React Status](https://react.statuscode.com/). 5. **Join Forums and Communities:** Engage with developers on platforms like [Stack Overflow](https://stackoverflow.com/) or specialized forums for React and Angular. Remember, the key is consistent practice and learning by doing. Good luck on your journey, and feel free to reach out if you have more questions! 🚀
- Ask HN: What are some unpopular technologies you wish people knew more about?
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MiniRx Signal Store for Angular - API Preview
Signal Store helps to streamline your usage of RxJS and Signals: e.g. connect and rxEffect understand both Signals and Observables
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Implement a simple bus event in Angular
Our bus event is really simple in fact. We have declared into the core module (provided in all the application) an rxjs Subject.
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Web scraping LinkedIn jobs using Puppeteer and RxJS
Web scraping may seem like a simple task, but there are many challenges to overcome. In this blog, we will dive into how to scrape LinkedIn to extract job listings. To do this, we will use Puppeteer and RxJS. The goal is to achieve web scraping in a declarative, modular, and scalable manner.
What are some alternatives?
duckdb - DuckDB is an in-process SQL OLAP Database Management System
Most.js - Ultra-high performance reactive programming
fp-ts - Functional programming in TypeScript
MobX - Simple, scalable state management.
eslint-plugin-unicorn - More than 100 powerful ESLint rules
Bacon - Functional reactive programming library for TypeScript and JavaScript
eslint-plugin-github - An opinionated collection of ESLint rules used by GitHub.
kefir - A Reactive Programming library for JavaScript
cross-project-council - OpenJS Foundation Cross Project Council
Cycle.js - A functional and reactive JavaScript framework for predictable code
proposal-pattern-matching - Pattern matching syntax for ECMAScript
Highland - High-level streams library for Node.js and the browser