proposal-observable
proposal-class-fields
proposal-observable | proposal-class-fields | |
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12 | 27 | |
3,036 | 1,616 | |
0.2% | - | |
0.0 | 1.8 | |
over 4 years ago | over 2 years ago | |
JavaScript | HTML | |
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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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đź’ˇ 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
proposal-class-fields
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Why is nobody talking about how much Proxies break Vue 3?
Private methods: Pretty simple to explain, private methods and fields straight up do not work with ES6 proxies, its a known issue https://github.com/tc39/proposal-class-fields/issues/106
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JS private class fields considered harmful
The #x syntax is ugly and many people don't like it. But if you understand how JavaScript works, you'll see that private x is not possible. Some comments on the proposal suggested private #x and there were plenty of other suggestions as well, it may be interesting to read through those discussions.
- Field declarations overwrite properties on the prototype
- Turning “hard private” into “soft private”
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All JavaScript and TypeScript features of the last 3 years explained
> - # private... not sure why they didn't just use the "private" keyword, but I don't care. I almost always use TypeScript anyways
One of the reasons was to allow private and public fields of the same name, so that subclasses are free to add own public fields without accidentally discovering private fields. There were many more considerations that went into the design: https://github.com/tc39/proposal-class-fields/blob/main/PRIV....
There was a heated debate about this and the choice of the # sigil back in 2015 at the time private fields were being designed: https://github.com/tc39/proposal-private-fields/issues/14.
- ES2022 Features!
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JavaScript Evolutsiyasi Qisqa Satrlarda!
Private class fieldlari va nihoyat classlarda access modifierlarni (private,static) qo'llash imkonini beruvchi sintaksis.
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Create Ref using React.createRef without using constructor in React?
class App extends React.Component { constructor(props) { super(props); this.state = { counter: 0 }; }} but due to Babel's class-field support, I don't use it anymore
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Correct use of arrow functions in React
I am using ReactJS with Babel and Webpack and using ES6 as well as the proposed class fields for arrow functions. I understand that arrow functions make things more efficient by not recreating the functions each render similar to how binding in the constructor works. However, I am not 100% sure if I am using them correctly. The following is a simplified section of my code in three different files.
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React component design patterns for 2022
Working with constructor and calling super() before we can set state. Although this has been solved with the introduction of class fields in JavaScript, Hooks still provide a simpler API
What are some alternatives?
duckdb - DuckDB is an in-process SQL OLAP Database Management System
proposal-private-methods - Private methods and getter/setters for ES6 classes
fp-ts - Functional programming in TypeScript
cross-project-council - OpenJS Foundation Cross Project Council
eslint-plugin-unicorn - More than 100 powerful ESLint rules
proposal-decorators - Decorators for ES6 classes
eslint-plugin-github - An opinionated collection of ESLint rules used by GitHub.
proposals - Tracking ECMAScript Proposals
RxJS - A reactive programming library for JavaScript
notes - TC39 meeting notes
proposal-private-fields - A Private Fields Proposal for ECMAScript