Front-End Web Developer with RxJs Salary in 2024

Where is RxJs used?

RxJs Alternatives

Most.js

A reactive programming library that focuses on high performance and low memory usage. Suitable for managing async operations and streams.

// Example using Most.js to create a stream of periodic events
const { periodic } = require('most');
const stream = periodic(1000); // emits a value every 1000ms

• Highly performant with low memory overhead.

• Lesser-known, smaller community compared to RxJS.

• APIs might be less extensive than RxJS.

Async.js

Provides utility functions for working with asynchronous JavaScript, focusing on traditional callback style.

// Example using async.js for parallel tasks
const async = require('async');
async.parallel([
  function(callback) { ... },
  function(callback) { ... }
], function(err, results) { ... });

• Simplifies working with callbacks and collections.

• Not focused on the reactive programming paradigm.

• Callback-centric, may lead to 'callback hell'.

Bacon.js

Functional reactive programming library for dealing with events and dynamic data structures.

// Example of event stream in Bacon.js
const Bacon = require('baconjs');
const clicks = Bacon.fromEvent(document.body, 'click');

• It offers a rich set of operators for event streams.

• Potentially steeper learning curve.

• Development is less active compared to RxJS.

Quick Facts about RxJs

Reactive Extensions Go JavaScript!

Once upon a time in 2012, Microsoft's cloud whisperers conjured up RxJS, a magical library making asynchronous events a breeze. This potion allowed developers to treat streams of data like heroic quests filled with events, giving them the power to filter, combine, and transform these streams without breaking a sweat—or their code!

An Ever-Evolving Elixir

The RxJS library, like a shapeshifting wizard, has undergone numerous transformations. From its early versions to the almighty 7.x series (as of my last update), it's been an adventure of breaking changes, performance potions, and syntactical spells. With every update, the library becomes less of a mystical maze and more like a well-organized grimoire for developers.

All Hail the Operators!

Within the reactive realm of RxJS, operators reign supreme. Think of them as the library's alchemical toolkit, empowering you to concoct queries like a true data alchemist. Take 'map' and 'filter', the trusty sidekicks, always ready to transform streams into more palatable potions or pick out only the choicest of events.

// A simple spell to multiply each number by two and filter out the odds
Rx.Observable.from([1, 2, 3, 4, 5])
  .map(val => val * 2)
  .filter(val => val % 2 === 0)
  .subscribe(console.log); // Outputs: 4, 8

What is the difference between Junior, Middle, Senior and Expert RxJs developer?

Top 10 RxJs Related Tech

1. JavaScript (TypeScript)

   
   

   Oh, JavaScript, the Shakespeare of web languages, with its quirky sonnets and heroic couplets! But when it wants to put on its big boy pants, it becomes TypeScript, JavaScript's more sophisticated sibling. You see, RxJS is like a spice that turns bland JS code into a mouth-watering dish, and mastering the art of these languages is akin to becoming a master chef in the digital kitchen.

1. Angular

   
   

   Angular, not to be confused with your grumpy uncle's demeanor, is a superheroic framework that pairs with RxJS like wine and cheese. It's built with RxJS at its heart, making it the Thor to RxJS's Mjolnir. Sprinkle some observables here and there, and you've got yourself a lightning-fast app!

1. NgRx

   
   

   The Robin to your Angular Batman. It's the state management sidekick that uses RxJS to help you keep track of your application's state as if you had a Batcomputer in your brain. It really shines when your app's state becomes more complex than a soap opera's plot!

1. Reactive Forms

   
   

   If forms were people, Reactive Forms would be that person who's always calm, even when filling out taxes. Thanks to RxJS, this Angular feature turns the stormy seas of form management into a serene lake. It's all about async data flow, making your forms as responsive as a well-trained butler.

1. Redux-Observable

   
   

   This is for the React fanatics who want a slice of RxJS with their Redux pie. It's a middleware to help you handle your actions with the finesse of a samurai, using epic streams of goodness. A perfect treat for those who'd rather spend their day orchestrating async operations than watching paint dry.

   
   

   const pingEpic = action$ => action$.pipe(
     ofType('PING'),
     delay(1000), // Asynchronously wait 1000ms then continue
     mapTo({ type: 'PONG' })
   );
   

1. VueRx

   
   

   VueRx is what happens when Vue.js meets RxJS and they decide to have a reactive baby. This plugin lets your data flow as smoothly as jazz, keeping your UI in sync with the rhythm of your application's heartbeat, with all the reactivity you need to build something that's both snappy and snazzy.

1. RxJS Testing (& marble testing)

   
   

   Testing RxJS is like a Ghostbusters for bugs – it zaps the pesky little critters before they slime your application. Marble testing, in particular, lets you visualize your observables over time, making debugging as fun as popping bubble wrap!

1. RxJS Libraries (RxDB, etc.)

   
   

   Imagine if your database got bitten by a radioactive spider and became super reactive! Libraries like RxDB make this fantasy a reality, allowing you to build nimble, offline-first applications that would make even Spider-Man jealous of your web (app).

1. RxJS Operators

   
   

   These are the magical spells of RxJS, transforming and bending data to your will like you're the Gandalf of the stream world. Mastering operators like map(), filter(), debounceTime() is essential to unleashing the full power of RxJS without accidentally summoning a Balrog.

   
   

   const search$ = textField.valueChanges.pipe(
     debounceTime(400),
     filter(text => text.length > 2),
     distinctUntilChanged()
   );
   

1. RxJS Extensions (rxjs-compat, etc.)

   
   

   Last but not least, in the sometimes unforgiving landscape of software evolution, RxJS extensions are like finding a water fountain in the desert. They ease the painful migration journeys between RxJS versions, ensuring that your observables continue to flow uninterrupted, like the Nile through Egypt.