{"id":3202,"date":"2018-01-16T15:53:10","date_gmt":"2018-01-16T10:23:10","guid":{"rendered":"https:\/\/code4developers.com\/?p=3202"},"modified":"2018-01-26T11:12:24","modified_gmt":"2018-01-26T05:42:24","slug":"redux","status":"publish","type":"post","link":"https:\/\/code4developers.com\/redux\/","title":{"rendered":"Redux"},"content":{"rendered":"
\n

Okay. So redux is a very simple solution to manage state. It has a few different parts, but none of them are difficult to understand, and it is very easy to work with. I don\u2019t think I ever see any bugs in that part of my code bases.<\/p>\n

<\/p>\n

Let\u2019s begin with the reducer. A redux setup consists of one or more reducer. A reducer is a function, plus the initial state. The reducer function is usually a large or small switch \/ case. You are free to write it exactly how you like, but it has to return a new version of your state, and it receives an object as input.<\/p>\n

The typical way to do it is to use a TYPE key in the object to tell what kind of change it is, and then some additional data, if needed.<\/p>\n

Important: input to a reducer is a pure object, and the output is a pure object.<\/p>\n

Then you have your actions, this is the stuff inside the switch \/ case.<\/p>\n

Then you have action-creators. These are functions that you use, and the result is that an action is invoked on the reducer. For example: load data from back-end, and then add that data to the store.<\/p>\n

This is the important part. You create a redux store, with one o<\/p>\n

r more reducer. This is an instance of your store. Then you can use the dispatch method on that store object to send actions to it, or to get the current state.<\/p>\n

You can either use it directly, but that would be a little bit \u201ccumbersome\u201d using React. What most people are doing is to create the store, and then add it to the Provider component in React-Redux. And then use connect.<\/p>\n

The way this works is that Provider add your store as a context, and then the connect function, component or what ever use it, and you first run it through a function where you chose what properties from the state you need, and then you run the function that returns with your component as an argument. It can also map any methods to dispatch.<\/p>\n

Or, if you don\u2019t want to do that, the dispatch method will be available as a prop on all component you run through connect.<\/p>\n

A few implementation tips at the end. Don\u2019t connect props you don\u2019t need, and only connect them where they are needed. There is no need for passing stuff down through long component structures with Redux. And make multiple smaller reducer rather than a few large ones. One patter I\u2019m a huge fan of is to use a higher order function to make a re-usable reducer for everything related to lists, with the redux part being re-usable and the matching and talking with back-end functions as params.<\/p>\n

Remember, you can actually test your reducer without hooking it up to redux, since it\u2019s just a plain JavaScript function.<\/p>\n

Here is the Example for redux.<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Okay. So redux is a very simple solution to manage state. It has a few different parts, but none of them are difficult to understand, and it is very easy…<\/p>\n","protected":false},"author":7,"featured_media":3204,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[93],"tags":[25,94,101,100,99],"powerkit_post_featured":[],"class_list":{"0":"post-3202","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-react","8":"tag-angularjs","9":"tag-react","10":"tag-react-redux","11":"tag-reducer","12":"tag-redux"},"jetpack_featured_media_url":"https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2018\/01\/Redux.png?fit=312%2C244&ssl=1","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/s8NAi4-redux","jetpack-related-posts":[{"id":3208,"url":"https:\/\/code4developers.com\/redux-example\/","url_meta":{"origin":3202,"position":0},"title":"Redux Example","author":"Arif Khoja","date":"January 22, 2018","format":false,"excerpt":"In case you missed out the basic for redux, you can Find it Here A Redux Store consists of a few different parts. You always have a single store, that uses either a single Reducer or Multiple Reducers (through Redux\u2019s CombineReducers method). And you dispatch actions to your reducers. (You\u2026","rel":"","context":"In "React"","block_context":{"text":"React","link":"https:\/\/code4developers.com\/category\/react\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2018\/01\/Redux.png?fit=312%2C244&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":3171,"url":"https:\/\/code4developers.com\/programming-asynchronously-promises\/","url_meta":{"origin":3202,"position":1},"title":"Programming asynchronously: Promises","author":"Arif Khoja","date":"December 20, 2017","format":false,"excerpt":"Promises are in many ways the logical next step from callback. A promise is just a special object that promise to either resolve, or throw an exception. Promises are easy to use, and easy to make. For example this is how you use some kind of library that uses promises:\u2026","rel":"","context":"In "JavaScript"","block_context":{"text":"JavaScript","link":"https:\/\/code4developers.com\/category\/javascript\/"},"img":{"alt_text":"javascript","src":"https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/10\/javascript.jpg?fit=750%2C422&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/10\/javascript.jpg?fit=750%2C422&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/10\/javascript.jpg?fit=750%2C422&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/10\/javascript.jpg?fit=750%2C422&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":3189,"url":"https:\/\/code4developers.com\/what-react-is-and-how-it-is-different\/","url_meta":{"origin":3202,"position":2},"title":"What React is, and how it is different.","author":"Arif Khoja","date":"January 3, 2018","format":false,"excerpt":"We often compare React, Angular and Vue. I get why. But it isn\u2019t the best. Because both Vue and Angular are more complete solutions for building web apps, while React are just a library for dealing with the user interface part of it. And leave other things like communicating with\u2026","rel":"","context":"In "React"","block_context":{"text":"React","link":"https:\/\/code4developers.com\/category\/react\/"},"img":{"alt_text":"react","src":"https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/12\/react_2.png?fit=375%2C375&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":3318,"url":"https:\/\/code4developers.com\/arguments-object-javascript-function\/","url_meta":{"origin":3202,"position":3},"title":"arguments object in JavaScript function","author":"Yatendrasinh Joddha","date":"March 19, 2018","format":false,"excerpt":"The arguments object is an Array-like object matching to the arguments passed to a function. The arguments object is a local variable available within all (non-arrow) functions. You can refer to a function's arguments within the function by using the arguments object.Let's consider below code: function addition(num1, num2) { return\u2026","rel":"","context":"In "JavaScript"","block_context":{"text":"JavaScript","link":"https:\/\/code4developers.com\/category\/javascript\/"},"img":{"alt_text":"javascript","src":"https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/10\/javascript.jpg?fit=750%2C422&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/10\/javascript.jpg?fit=750%2C422&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/10\/javascript.jpg?fit=750%2C422&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/10\/javascript.jpg?fit=750%2C422&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":14686,"url":"https:\/\/code4developers.com\/unlocking-the-power-of-react-hooks\/","url_meta":{"origin":3202,"position":4},"title":"Unlocking the Power of React Hooks: A Comprehensive Guide with Examples","author":"Yatendrasinh Joddha","date":"October 15, 2023","format":false,"excerpt":"In the ever-evolving world of web development, React has been a game-changer. It simplifies building interactive and dynamic user interfaces. With React, you can create components, manage states, and handle side effects seamlessly. But as React evolves, so do the best practices and techniques for building applications. One significant improvement\u2026","rel":"","context":"In "React"","block_context":{"text":"React","link":"https:\/\/code4developers.com\/category\/react\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2023\/10\/React-icon.svg_-1-e1697396875978.png?fit=250%2C217&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":3182,"url":"https:\/\/code4developers.com\/react-blog-post-serieses-react-development\/","url_meta":{"origin":3202,"position":5},"title":"React: A blog post series about React development","author":"Arif Khoja","date":"December 30, 2017","format":false,"excerpt":"One of the first things I wrote down in my notebook as I was planning or trying to figure out if there was enough stuff to write about to do this site was a React introduction. I know React fairly well, and have been working full-time with it for quite\u2026","rel":"","context":"In "React"","block_context":{"text":"React","link":"https:\/\/code4developers.com\/category\/react\/"},"img":{"alt_text":"react","src":"https:\/\/i0.wp.com\/code4developers.com\/wp-content\/uploads\/2017\/12\/react_2.png?fit=375%2C375&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]}],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/posts\/3202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/comments?post=3202"}],"version-history":[{"count":6,"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/posts\/3202\/revisions"}],"predecessor-version":[{"id":3213,"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/posts\/3202\/revisions\/3213"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/media\/3204"}],"wp:attachment":[{"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/media?parent=3202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/categories?post=3202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/tags?post=3202"},{"taxonomy":"powerkit_post_featured","embeddable":true,"href":"https:\/\/code4developers.com\/wp-json\/wp\/v2\/powerkit_post_featured?post=3202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}