reselect VS redux

Each one of those method calls represents a potentially huge tree of nested method calls. And if we've implemented memoization, it would all run in O(n), where n is the total number of methods. There is no performance impact from the nested calls and we're guaranteed to respect all business rules at every level (DRY), while keeping each method easily readable. reselect is a perfectly good library that provides composability and memoization.

But we needed this in Reselect because it has an incredibly variadic JS runtime API. You can pass in any number of input selectors, as either individual function arguments or one big array, and all the rest of the output behavior depends on those. This one giant MergeParameters type is effectively replacing 3300 lines of copy-pasta'd typedefs for 1...12 input selectors.

One thing that can help is the new customization options in Reselect 4.1.x. You don't need a deep equal check here. Instead, you could use a shallow check as the resultEqualityCheck option. It would still end up having to re-run the filter statement, because the input array is being changed to a new reference when you do an update to any item in the array. Filtering the array does create a new result array reference. But, resultEqualityCheck: shallowEqual will reuse the previous result as long as the contents of the array are the same, and that will prevent the component from re-rendering.

Over the years, as I've been using Redux, I've tried quite a few different forms of testing. Actions, reducers, sagas, selectors, some with more boiler plate results than others. One of the evolutions of testing that I've enjoyed the most has been with the library I use for selectors, reselect.

While Reselect has always been a separate library from Redux itself, it's in our Github org. The previous maintainer had to stop working on it, so a couple months ago we did some major updates to Reselect. Reselect 4.1.x has huge improvements to its TS types for better inference, and adds a new set of customization options like cache sizes > 1.

Fourth, Use Reselect / Re-reselect in Redux to Avoid Frequent Re-render. Reselect is a library for building memoized selectors that is commonly used for redux.

Another great tool used in the Redux world is Reselect. Storing the bare minimum data in the Redux store and then deriving data with memoization using Reselect. I had to create a poor man's version here. Feel free to check it out :)

We've completely revamped the Reselect types in the last few weeks and added new cache size options to its API - see https://github.com/reduxjs/reselect/releases

Reselect

In this post we are going to look closely to one of the state management libraries - Zustand. This is a good alternative to Redux for development of React applications if you find Redux too complicated or too heavy for your current project.

Reactjs I'm coming from AngularJS world and start some days ago writing my first React App with react-router, in AngularJS I do: app.directive('Loading', function($rootScope, $timeout) { return { restrict: 'E', replace: true, template: 'Loading' link: function(scope, element) { $rootScope.$on('$routeChangeStart', function(event, currentRoute, previousRoute) { element.removeClass('ng-hide'); }); $rootScope.$on('$routeChangeSuccess', function() { element.addClass('ng-hide'); }); } };}); and then I just add . So now in my React App I have: class App extends Component { render() { return ( Home About ); }} and my two components are simple: class Home extends Component { render() { return ( Home ); }}class About extends Component { render() { return ( About ); }} Can I do this without using reduxJS? Answer link : https://codehunter.cc/a/reactjs/display-a-simple-loading-indicator-between-routes-in-react-router

It is using Webpack for bundling, Redux and Immer for application state management.

This project was bootstrapped with Create React App, using the Redux and Redux Toolkit template.

State Management: Redux _ a Predictable State Container for React.

This will be a course for becoming a Complete Modern React Developer in 2022. The only three topics which are not covered in this course are Redux, GraphQL and React Native which could be covered in a future course. TypeScript is going to be the main programming language covered however if you already know JavaScript then you should find it quite easy to understand because the syntax is not that much different.

the main property of package.json file for redux is "main": "lib/redux.js", but I can't find such a file/module on the Redux Github page.

Addressed in the initial comment of the deprecation discussion issue

Release notes https://github.com/reduxjs/redux/releases/tag/v4.2.0