How statistics are calculated
We count how many offers each candidate received and for what salary. For example, if a Full Stack Web with Redux with a salary of $4,500 received 10 offers, then we would count him 10 times. If there were no offers, then he would not get into the statistics either.
The graph column is the total number of offers. This is not the number of vacancies, but an indicator of the level of demand. The more offers there are, the more companies try to hire such a specialist. 5k+ includes candidates with salaries >= $5,000 and < $5,500.
Median Salary Expectation – the weighted average of the market offer in the selected specialization, that is, the most frequent job offers for the selected specialization received by candidates. We do not count accepted or rejected offers.
Trending Full Stack Web tech & tools in 2024
Most popular Web Engineering trends in 2024
Where is Redux used?
State Wrangling in React Rodeos
- Imagine a wild herd of states in a React app, Redux lassos them for an easier roundup.
Time-Travelling Debug Delight
- With Redux, developers don the hat of a chrono-detective, stepping through state changes like a walk in the time park.
Consistent State Across Cosmic Components
- Developers use Redux to whisper sweet nothings to components, keeping their states in a harmonious dance across the cosmos.
Scaling Mount Performance
- When apps hit puberty and grow big, Redux pumps up their performance muscles, making them lean mean state-management machines.
Redux Alternatives
Context API
Built into React for state management, simplifying component-state sharing without 3rd-party libraries.
// Context creation
const MyContext = React.createContext(defaultValue);
// Context Provider
{/* Components */}
// Context Consumer
{value => /* render something based on the context value */}
- Integrated in React, no extra library needed.
- Ideal for small to medium-size apps.
- Simpler API compared to Redux.
- Lack of middleware support.
- Not as scalable for complex state management.
- Less dev tools compared to Redux.
MobX
Reactive state management solution leveraging observables for automatic updates of the UI responsive to state changes.
// Defining an observable state
const store = observable({
count: 0,
increment() {
this.count++
}
});
// Reacting to state changes
autorun(() => {
console.log(store.count);
});
// Triggering state changes
store.increment();
- Simple and effective for complex states.
- Automatic reactions to state changes.
- Less boilerplate code than Redux.
- Less predictable state mutations.
- Can be overkill for simple state management.
- Potential performance issues with large object trees.
Recoil
A state management library for React providing a more granular approach to state updates with atoms and selectors.
// Atom definition
const textState = atom({
key: 'textState', // unique ID
default: '', // default value
});
// Component using atom
function TextInput() {
const [text, setText] = useRecoilState(textState);
return (
setText(e.target.value)} />
);
}
- Granular control over state and re-rendering.
- Components can subscribe to only parts of the state.
- Built-in async queries support.
- Still in experimental phase.
- Smaller community and ecosystem.
- APIs may change, as it is not fully stable yet.
Quick Facts about Redux
Redux: The State Wrangler
Once upon a time in 2015, two JavaScript cowboys, Dan Abramov and Andrew Clark, corralled the chaos of state management into a harmonious library known as Redux. Inspired by Facebook's Flux and the functional fervor of Elm, they concocted a single source of truth that made state mutations in the web dev saloon predictable and trackable. Behold, the Redux revolution began!
The Immutable Time Machine
Redux brought a sherif-like order to the Wild West of states with its unchanging, or 'immutable', state containers. Every action was like a "Wanted" poster, telegraphing the wanted changes without a single tumbleweed of state being altered along the way. Time-travel debugging? Yep, that futuristic voodoo was baked right in, allowing developers to rewind and replay application states faster than a gunslinger could draw!
The Version Saga
Since its inception, Redux has been through a saga of versions, each more refined than the last. Beginning with its beta release faster than a jackrabbit, it sprinted past v1.0 in the same year of its birth. The community lassoed in with creative addons like Redux-Saga, and like a beloved folk hero, Redux has become an essential tale in the developer's lore, with its epic last stand at version 4.x.x as of my update, holding the fort with new features and fixes.
Here's a snippet of Redux in its natural habitat, taming a wild action in the vast plains of an app:
const ADD_TODO = 'ADD_TODO';
function addTodoAction(text) {
return {
type: ADD_TODO,
text
};
}
What is the difference between Junior, Middle, Senior and Expert Redux developer?
Seniority Name | Years of Experience | Average Salary (USD/year) | Responsibilities & Activities | Quality-wise |
---|---|---|---|---|
Junior | 0-2 | 50,000 - 70,000 |
| Learning best practices, work requires frequent review |
Middle | 2-4 | 70,000 - 95,000 |
| Consistent quality, occasional guidance needed |
Senior | 4-6 | 95,000 - 120,000 |
| High-quality work, showcases leadership in project execution |
Expert/Team Lead | 6+ | 120,000 - 150,000+ |
| Exceptional quality, establishes standards, and processes |
Top 10 Redux Related Tech
JavaScript
Imagine trying to dance without music; that's coding Redux without JavaScript. This programming language is the salsa sauce to your nachos, the foundation of all things Redux. Without it, you're just wiggling your fingers on a keyboard making magic spells.
const action = { type: 'DANCE', steps: 'salsa' };
React
React and Redux are like Batman and Robin, peanut butter and jelly, weekends and sleeping in. This library is essential for rendering dynamic UI with states managed beautifully by Redux. It's like having a genie to maintain your app's views while you focus on granting wishes.
import React from 'react';
import { useSelector } from 'react-redux';
const DanceMoves = () => {
const moves = useSelector((state) => state.moves);
return <div>{moves}</div>;
};
Redux Toolkit
Redux Toolkit is like your Swiss Army knife in the wilderness of state management. It packages simple patterns and best practices into one delightful bundle. RTK slices, dices, and makes managing Redux state as easy as pie (mmm, pie...).
import { configureStore } from '@reduxjs/toolkit';
import reducer from './reducer';
const store = configureStore({ reducer });
Redux DevTools Extension
Ever wanted to be a time traveler? Redux DevTools is the closest thing to a DeLorean in the Redux universe, allowing you to jump to different states faster than Marty McFly says "Great Scott!" It's a must-have for nipping bugs in their buggy buds.
import { composeWithDevTools } from 'redux-devtools-extension';
const store = createStore(reducer, composeWithDevTools());
Redux-Saga
Picture Redux-Saga as the orchestra conductor for the asynchronous symphony in your app. It makes async flows (like data fetching) as elegant as a tuxedo-clad Maestro waving a baton at a room full of musical prodigies.
import { call, put, takeEvery } from 'redux-saga/effects';
function* fetchUser(action) {
const user = yield call(Api.fetchUser, action.payload.userId);
yield put({ type: 'USER_FETCH_SUCCEEDED', user });
}
function* mySaga() {
yield takeEvery('USER_FETCH_REQUESTED', fetchUser);
}
Redux-Thunk
Need to kick back and dispatch actions with delayed gratification? Redux-Thunk is like that friend who tells you, "Chill, I got this," and then actually does. It's middleware that allows you to write action creators that return a function instead of an action.
const fetchUser = (userId) => {
return (dispatch) => {
dispatch({ type: 'USER_FETCH_STARTED' });
fetchUserById(userId).then(user =>
dispatch({ type: 'USER_FETCH_SUCCEEDED', user })
);
};
};
Reselect
Imagine having a personal assistant who remembers all your preferences. That's Reselect in the Redux world. It’s a selector library for Redux, optimizing state computation and giving your components what they need without breaking a sweat.
import { createSelector } from 'reselect';
const getMoves = state => state.moves;
const getRhythm = createSelector(
getMoves,
moves => moves.filter(move => move.isRhythmic)
);
Immutable.js
With Immutable.js, your state's untouchability rivals that of King Tut's tomb. It helps keep your state read-only, leading to fewer bugs and a happier coding life (And fewer curses than King Tut's visitors).
import { Map } from 'immutable';
const initialState = Map({ isDancing: false });
function danceReducer(state = initialState, action) {
switch (action.type) {
case 'START_DANCING':
return state.set('isDancing', true);
default:
return state;
}
}
Typescript
Ever wanted a bouncer at the door of your code checking types like IDs? Enter TypeScript—the strongly typed bouncer for JavaScript. It adds a layer of type safety, reducing runtime errors and making refactors less scary than clowns at a birthday party.
interface DanceState {
isDancing: boolean;
}
type DanceAction = { type: 'START_DANCING'; };
const danceReducer: Reducer<DanceState, DanceAction> = (state = { isDancing: false }, action) => {
// reducer logic
};
Webpack/Babel
Webpack bundles your assets like a financial advisor consolidates your investments. Pair it with Babel, the translator who turns your modern JavaScript into something even Internet Explorer can understand (almost a miracle worker).
module.exports = {
entry: './src/index.js',
output: {
path: __dirname + '/dist',
filename: 'bundle.js'
},
module: {
rules: [{ test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader' }]
}
};