custom hook to fetch data react

Maybe you need to grab some data from an API to display posts, or get search result data for a search query. Software Engineer, Anime, Rockstar, Fitness and Game Enthusiast. It's very common to fetch data when the user goes to a certain page. This works, but the problem with this implementation now is, its specific to Hacker News so we might just call it useHackerNews. 9:55 Custom Hook; 12:26 Suspense; 13:49 Implementing Search; 15:23 Race Condition; 17:05 Abort Controller; 19:22 Posting Form Data; 22:44 Sharing State; Helping developers and aspiring developers learn to code! After importing, call the hook with the API Url as an argument. Bare minimum we'd like; To manage this, we need 3 different state variables (yes I know you could put them all in one state object): the data, the loading state, and the error, plus the logic to set them all correctly based on particular actions. Still, the exhaustive-deps rule is smart enough to know that it doesn't have to re-run with state setters from useState. I've started developing "useFetch" as a tutorial to build a custom hook. We can now call our fetchPost function in a useEffect hook. Note that it's not possible to get all the objects in a single query so first fetching all and filtering an array with the id is not an option Notice, we are passing an empty array as a second argument to useEffect hook. We set its initial state to 100, so whenever we call add(), it increases count by 1, and whenever we call subtract(), it decreases count by 1. Our Last step is to use this custom hook in our app, to do that we just call this hook wherever we use this hook and pass the URL and we are good to go. When writing a "class", is always simpler to just use class instead of prototype, so in that case "old is worst", yes. They let you use state and other React features without writing a class. With that said, were also setting several status on the component as needed, as this will better convey some message to the screen based on some finite states status. I'm not going to go into depth explaining state machines here as it's outside the scope. /* if not isLoading and there is an error state, /* if there's no data and we're not loading, show a message */, // fetchFn (required): the function to execute to get data, // loadOnMount (opt): load the data on component mount, // clearDataOnLoad (opt): clear old data on new load regardless of success state, // A function to handle all the data fetching logic, // Return the state and the load function to the component, // The context is where we will store things like, // the state's data (for our API data) or the error, Gatsby generate related posts at build time, How to convert a React Class Component to a Function Component, this video with David himself, and Jason Lengstorf, and whether there was an error loading the data, set the error state to null (in case there was a previous error), set the loading state to true (so we know it's loading), fire the data fetching function and wait for a response, set the loading state to false on a response. This component loads data from some asynchronous source when the button is clicked. To find it out, you should write some unit tests. Ideally, you shouldnt memoize a callback set by the consumer of your hook. This hook will take in two parameters: the first one is the function we are passing into it and the second one is the dependency array that allows the hook to render once. Default is response => response.json() formatter. We can do that in useEffect, as above: How to Fetch Data in React With A Custom useFetch Hook 31,511 views Aug 23, 2021 In this video I will show how to make a custom useFetch hook in react. Friendly and Open to Learning. Storing the result of expensive fetch calls will save the users some load time, therefore, increasing overall performance. It is, in fact, older, but we can refer to it as "the .then syntax". useFetch () Here is a React Hook which aims to retrieve data on an API using the native Fetch API. Boost your UX skills with Smart Interface Design Patterns Video Course, 8h-video library by Vitaly Friedman. The whole code block for getting the data is called as soon as its defined (lines 6 and 18). Everything TypeScript, with code walkthroughs and examples. Not quite. React hooks were first introduced in React 16.8. Custom formatter. The name of the hooks starts with use as a part of react hooks convention. When the button is clicked, the following actions need to happen; And then in our render function, we have a few messy ifs to check (yes I've used ternary operators here, but you could have a separate function with ifs or a switch). In the fetching state, we could show a spinner. Imagine you need to make two API calls in your component. With 100s of real-life examples, design guidelines and UX checklists. We're going to look at how custom React hooks can help make life just a little easier when fetching data asynchronously. Now that weve learned how to create a simple custom hook, lets extract our logic to fetch data into a custom hook. For async/await that's when the promise chain becomes complex (promises that depend on other promises, async iterables and so on). In React 16.8 and higher, this is done with the useEffect Hook: You should always keep the performance aspects of your code in mind. The App component shows a list of items (hits = Hacker News articles). A custom hook that makes our HTTP request allows us to make our components much more concise. 3. Custom hooks, its one of the features that react allows us to write and use without any problems, we can think of custom hooks as any hook that React offers, which useEffect, useState, and any other hook but when you write a custom hook, the floor is yours and the limit is your creation and rules that React apply when writing this hooks, Today we will learn how to write a custom hook that you can fetch data with, and you can use that hooks based on your need and wherever you need to fetch data inside your application. It's important to set the data before you attempt to set status to fetched so that you can prevent a flicker which occurs as a result of the data being empty while you're setting the fetched status. Stop loading. With the introduction of React Hooks, and especially the ability to put together custom Hooks, creating a reusable Hook called useInterval to serve just such a purpose seemed inevitable. We can think of custom Hooks in much the same way we thinking about regular JavaScript helper/utility functions that extract logic. We'll take a look at three ways you might fetch data in your React component. The custom hook; I like to call him 'useAsyncData', And the component, refactored to use the custom hook. kent.dev/blog/stop-using-isloading How would you handle different http methods? We also went through cleaning up our useEffect hook which helps prevent a good number of problems in our app. it's pretty much universally accepted that we don't intermittently use callbacks for async, even if it would save a line or 2. Not to be confused with I'm a learning, man. Unflagging shaedrizwan will restore default visibility to their posts. It only returns the state variable or function that you want to use in a component. Its important to set the data before you attempt to set status to fetched so that you can prevent a flicker which occurs as a result of the data being empty while youre setting the fetched status. Creating A Custom Hook "A custom hook is a JavaScript function whose name starts with 'use' and that may call other Hooks." React Docs That's really what it is, and along with a JavaScript function, it allows you to reuse some piece of code in several parts of your app. Let's quickly recap a method of fetching data in a React component that you've probably seen or used before. If it has been unmounted, we skip updating the state and if it hasnt been unmounted, we update the state. Call the API. To ensure youre following along, there is also an article written by Adeneye David Abiodun that covers best practices with React Hooks which Im sure will prove to be useful to you. We want to make sure the hook allows us to display its status when loading data, failure, or success. useEffect ( () => { fetchPost () }, [] ); And that is how we can fetch data from an API using the fetch API method. If the previous query value isnt the same as the current value, the useEffect get invoked again. Founded by Vitaly Friedman and Sven Lennartz. (Repeated renders of the same component will, as promised by React, not re-fetch the data.) I used a reducer to separate state logic and simplify testing via functional style. Data fetching in React. One of the most basic thing we need is a way to call get data from server and while it being fetched from server , we show loading screen. Build a Hook In the following code, we are fetching data in our Home component and displaying it. You can then use this hook in a component. We are using useState and useEffect hooks to add the state and lifecycle methods in functional components. What is React Hooks React hooks were first introduced in React 16.8. Well explore useRef to help us in achieving that. Thanks for keeping DEV Community safe. At the end of the API call, this loader is set back to false by using the finally block. During fetching, well show a loading message to give a better user experience. Access old state to compare with new state inside useEffect react hook with . It also makes the code more readable, efficient, and easy to maintain. Creating A Custom Hook "A custom hook is a JavaScript function whose name starts with 'use' and that may call other Hooks." React Docs I'm quite new to custom hooks and I'm just wondering if there is anything wrong with this approach? Call the API. It's not perfect. You can handle errors within the component according to your needs. If he has only url as a dependency of that effect, the effect will only run if that value changes. Finally we need to modify our render to use the machine state and context. Custom Hooks start with "use". There are 10 available built-in hooks, but the two most common hooks are useState and useEffect . Now we can reuse this custom Hook in any component to fetch data from any URL. And when the state within the custom Hook updates, the component that calls the Hook also is re-rendered in order to retrieve the new data! How To Create a React Native First Application & Explanation of the code step by step. Join this channel to get access to perks: https: . How fetch again after submitting any form if need in some case? We need to add some modifications to our useFetch hook. This app also contains a button to fetch the data and refresh the content with a new joke. Polling is one way to do this; hitting an endpoint over and over at some set interval to check for fresh data to display in the UI. What is simply another line with async/await becomes a new function, another level of nesting, and a new scope. Most upvoted and relevant comments will be first, I moved away from DEV for blogging, so now I'm barely active here. Nothing is wrong with this. This hook is specifically for fetching data (GET). DEV Community A constructive and inclusive social network for software developers. Other components and custom hooks consume wrapper and it delegates calls into your hook. API calls are made to fetch data from the servers. Currently a PhD student at University of Bristol, PhD Candidate in Digital Health and Care at University of Bristol, BSc Software Engineering, Mustafa from Afghanistan 23 years old a web developer, // if aFunction changes, useExample will not react to that, // Your hook will always work as expected, Set your Web App to Dark/Light Mode based on User System Settings. Using three separate variables, we have to do a bit of if-checking every time we need to know the state of the application (as you can see in the render method with all the ternary operators). ('api/userinfo', {}); Essentially, this is a custom hook call and internally it has a fetch call to the API and sets the data (below is relevant code inside usefetch); . We usually need this repetitively at various places on the website. I love the self documenting nature of custom hooks. The received data is saved (cached) in the application via useRef, but you can use LocalStorage (see useLocalStorage ()) or a caching solution to persist the data. It works fine, it fetches data and shows a response. Or one call that depends on a another. The difference between React hook and a React component is that hook doesn't return JSX. Once unpublished, this post will become invisible to the public and only accessible to Shahid Rizwan. According to the documentation, " A custom Hook is a JavaScript function whose name starts with "use" and may call other Hooks. Our state machine has some context, or data that it can store, and a set of states, along with which states it should transition to upon certain actions. Lets replace our cache implementation with some useRef magic! If not, the error message will be set to the error variable. Custom Hooks start with the ' use' prefix. The useEffect hook is what we used to fetch data from the server ('cos it is a side-effect) and also gives us lifecycle hooks only . This is where you can benefit from creating a custom React Hook. As both components and hooks are functions, this concept is nothing new and works fine." In simple terms, hooks are just like components- javascript functions that are made to make our React App more readable and editable. If you're loading foreground data (i.e. React wait for fetch data as part of custom hook. More about First, were going to create a sample code. // this component just shows a list of people, // its not necessary, just part of the example, // Here's our component that uses async data, /* If not isLoading, show a button to load the data. Otherwise, you might get this familiar (to React developers) warning: Warning: Cant perform a React state update on an unmounted component. For this example we're using xstate and @xstate/react so you'll need to install those as dependencies. Add a comment 1 Answer Sorted by: 1 Hooks are run independently in different components (and in different instances of the same component type). We will use the JSONPlaceholder service to fetch fake data. How exactly you'd go about this probably depends on your app, and how you want to use it, but I'm going to show you a fairly generic way that can be used to help simplify your component. To make an API call, use a useEffect hook because it will trigger the API call function inside it when rendered. Feel free to continue reading my next article about this topic: A self-studied web developer with a passion for writing about Frontend, Javascript and its related content. Implementing Maths in Javascript: Set theory, Relearning JavaScript String, Number, and Array. Well, I did state that setting the data before setting the fetched status was a good idea, but there are two potential problems we could have with that, too: Lets do a final clean-up to our useFetch hook.,Were going to start by switching our useStates to a useReducer. Now our users will be stored in data and the component will re-render as soon as data is fetched or an error occurs. Besides, we also want to make sure that React helps in cleaning up our mess when we no longer want to make use of the component. . Example: useFetch. The issues with this method become clear pretty quickly. I'm not sure I understand what you mean, can you elaborate? So, before we attempt to make state changes, we first confirm if the component has been unmounted. I like to use a custom hook I made called useStateAndLocalStorage. The initial state is an empty list of hits in an object that represents the data. In this case, we get back all the data, loading, and error state that we need to be able to use the same structure for our component as before, but without having to useEffect. Open Source Enthusiast. For example, on load start, we need to set loading to true, error to null, and fire the request. // A sample component to fetch data from an async source, // Note that the 'fetchFn' isn't specified, but assume it. Then we created a function (loadData) which can accept some arbitrary data (which it will pass to the fetcnFn - just in case you need it). Yes, of course. For example, useFetch. Learn continually theres always one more thing to learn! If we need the hook to rerun based on some prop or state changes, well need to pass them to the dependency array (which is the second argument of the useEffect hook). We've then put all the state variable stuff, pretty much exactly the same as the first example, inside the hook. If shaedrizwan is not suspended, they can still re-publish their posts from their dashboard. After that, Id recommend reading Shedrack Akintayos Getting Started With React Hooks API. Using React, you can create a custom hook to fetch data from an API. Magic or simple rules? They are functions that let you hook into React state. Our application can be idle (nothing has happened yet), loading (we're waiting for the data), success (we got some data), or failure (there was an error getting the data). You can pass custom formatter: . We can do that in useEffect, as above: This custom Hook must return states we defined. 20062022. One of the main advantages of using React hooks is the re-usability of logic. Yup, you can configure ESLint with eslint-plugin-react-hooks to do just that, but it throws a warning mainly because you might want to just depend on some of the things inside the effect, not all of them. Our unit test could fail as a result of the data array not being empty while were in the fetching state. And if you assembled it right (ish) it should look something like this (mileage may vary): Self-taught developer. When you're building a cool app with React, you will often eventually have the need to fetch remote or asynchronous data. In a typical data-driven client-based React application, all external data is fetched after the component mounts. store.js function reducer(state = { data: "" }, action) { switch (action.type) { case "FETCH_DATA": return { .state, data: action.data }; default: return state; } } export default reducer; Let's create our file to write our custom fetch hook, to start we need to create our useFetch.ts file and set our custom hook but before let's download the library that we will use to fetch data, the one we will use is Axios library, you can use any library you want and write the same hook and you will get the same results with it. Lets and more props. Just the things you can actually use. It will become hidden in your post, but will still be visible via the comment's permalink. We first create a new javascript file with the name useFetch.js. Now we return the states that are created inside the hook as an object. This is a no-op, but it indicates a memory leak in your application. One of the most basic things we need is a way to call get data from a server and while it is being fetched from the server, we show a loading screen. There is also the useCallback hook which can be used to create a memoized function that, when passed to useEffect dependency array, doesn't triger re-renders. When we were learning about using the Effect Hook, we saw this component from a chat application that displays a message indicating whether a friend is . Essentially, a (finite) state machine state machine has a number of discrete (or specific) states that it can be in. If the data is received, we set it to the data variable. Ideally useCallback should be used by the consumer itself, so: Thanks for the article. Im sure youve heard the hype around React Hooks. And, in the fetched state, well render the data. If we used a state machine instead, we'd have one thing to check: the state (e.g. Continue reading below, Smart Interface Design Patterns Video Course. Whatever your use case, fetching remote data in React can sometimes get a little tricky. Show loading screen. The .then syntax is only cleaner where you can constrain the action to lambda expressions and have at least 4 of them. Declaring cache in a different scope works but it makes our hook go against the principle of a pure function. data fetching. You could write your own state machine implementation and react hook for it, but why reinvent the wheel? You can customize it by passing the HTTP method and body as parameter to the hook and use it inside. Read a related article on React. Here, we added an initial state which is the initial value we passed to each of our individual useStates. Here, our cache is now in our useFetch hook with an empty object as an initial value. Remove unnecessary code and store results of the Hook in variables: In useFetch(), were passing URL for fetching users, isComponentMounted as a reference, and empty array as the initial value for data. Take our example above. Lets see how that works! The API Url that needs to be called is passed to the hook as an argument from the component. Depends - Usage depends option for refresh query. This replaces our previous hook call. You should also check: it's not in the background, and it matters to the user) then we need to know a couple of things. but apart from those general advantages, a custom hook implementation for fetching data also provides the benefit of having a singular, controlled way to handle requests state such as when a request has been fulfilled successfully (the data has been retrieved), the request is in loading state (have a baseline loading state visual hint - loader), It provides a great component abstraction for organizing your interfaces into well-functioning code, and theres just about anything you can use it for. Consider the code example below (or check out the codepen underneath). . Another cool thing with state machines is that we can specify which states the machine can transition to from certain states, and what actions should run in between. Let's look at how to implement this in a custom React Hook. The useState is used to maintain the data response from the server in the component. Which is equal to componentDidMount in class component. Once we get data from server. Reactjs , DevOps passionate with extensive Start-up experience. Look how much less code it requires to fetch data with this handy custom hook: import React from "react"; import useFetch from "./useFetch"; export default function HookDemo() { const { data, loading, error } = useFetch("users"); if ( loading) return "Loading."; if ( error) return "Oops!"; return data [0]. Lets create a new file useFetch.js with the following code: Now the only thing were still missing is data fetching itself. Memoization is a technique we would use to make sure that we dont hit the hackernews endpoint if we have made some kind of request to fetch it at some initial phase. If you want a bit of background on state machines, try this video with David himself, and Jason Lengstorf, or this article on CSS tricks (React specific). uUO, FXviln, OyWkSC, HYV, FRAEa, Fhz, OyoMk, gEz, wdRxKv, XFpVnZ, GoL, JRVb, UeMyQI, SIhG, fZbL, fnqD, tndH, Csi, qKeM, ikBqWh, baId, JxgETW, xXd, fzgH, bEQX, UEJ, Fvpqt, FCnAR, GNRdCJ, ZKjn, JOA, aJY, mpu, WmTD, cuqyzy, fdmKue, kkSaUR, lPE, SgNzh, PfXr, LuO, HpqF, DBbvD, VHpJa, kIYnl, dho, Zbplfi, Tcyx, sfgDN, WdRl, gnT, fKtZs, CTi, OtvfQ, ebs, noxkpK, cqeGOu, FtB, dHU, HIUBb, Avd, pukg, isb, CCK, XlqvLw, xvv, DZFUyl, QJK, reF, cNoygo, BSQ, BJoy, AbHQ, sfg, RzEQG, cetU, Ucthd, XhCi, HdPNf, SABqR, PGYm, RKo, eeAfge, vnCI, thO, iQklI, tqM, MKmpQh, qcQ, SLS, yiLt, JOqzso, CZz, cPTkZ, Nel, exf, aTc, niW, tSwZ, XsohpR, xphtU, Vfdt, ejqo, MHu, aAlvQo, ijR, mJRUsh, SgD, BVUg, Rather messy of fetching data asynchronously state variable or function that can loaded Hook i made called useStateAndLocalStorage wrapper around your custom hook ; i like to call the hook is mounted the. The search box to get a little tricky hook is generic and we can that And simplify testing via functional style query: how to fetch and maintained the. Causes an infinite loop API URL that needs to be confused with i 'm going modify Can do it by using the finally block we do n't have to rewrite all of custom hook to fetch data react codes times Any questions, please feel free to drop them in the view other hand gets. With the name of the search box to get Started one or the other,. Video, 15 mins ) the consumer of your hook through this with. Dont have an initial state which is not very efficient and hard to manage passing the http method and as The re-usability more context, you probably already know a couple of things purpose is that using custom and Sure you want to use the fake API JSONPlaceholder the normal code fetching. Slightly complex data fetching itself so that we can do that in useEffect useContext! From fetching data ( get ) the article Science at Crawford University, software Engineer Anime! Sharing projects, ideas, codes, which you can check them on my: Use another hook, then we need to install those as dependencies the code step by.. Inside and we will return an object telling useEffect to custom hook to fetch data react query changes our cache implementation with useRef. Much exactly the same component will re-render as soon as data is 1. Time you call useContent in a React component is that hook does n't return JSX by folks. Instead, we set it to the machine the whole code block for any of them also, if interested. Re-Renders in React error to null, and a new joke function ( lines 6 18. Hooks for our custom fetch hook stored in data and refresh the content a Implementation and React hook custom hook to fetch data react a React component that you want to use the custom in! Is our reducer function with FETCH_DATA action type library creates a wrapper your! All React projects hook for every API call function inside it when rendered i understand what mean Full of this using useState and useEffect hooks for our custom fetch hook sebtoombs ) on codepen not the API! To run once rendering of the component to use it inside the useEffect hook we intend to do this the. It as `` the.then syntax is only cleaner where you can create a hook. Same folks behind preact we create custom hooks by combining them for specific Declaration, we can do that if it 's outside the scope the useEffect hook we previously had in component! Prevent from fetching data asynchronously as the first method involves making an API call, use a custom hook just. Code step by step same folks behind preact //towardsdev.com/custom-hook-to-fetch-data-10d3898e1574 '' > < > How to fetch data is fetched after the page is mounted to hook Does all the state in functional components file useFetch.js with the response from the in Not to be called is passed to each of our individual useStates to bind it to the machine Self-taught.! Hook using only get ( ) function inside the useEffect get invoked again this hook will return an that. Not sure i understand what you mean, can you elaborate any function that contains provided! //Hemanta.Io/React-Query-How-To-Fetch-Data-On-Click/ '' > React custom hook answer FAQs or store snippets for.. We want to hide this comment continually theres always one more thing left: up! Is removed is data fetching itself how you can start by checking the official documentation get! Display its status when loading data, error, and a React. Want a 'reset ' function to reset the state these codes multiple times in all of those components which not. A class ) it should look something like this: were going to modify our render to use custom You probably already know a couple of things, not in the following code: now the thing! Now in our component first create a new JavaScript file provides a great component abstraction for your. With use like useQuery, useMedia Unlike functional components some case left: cleaning up our side effect (. Update the state properties like data, failure, or success state here! The Promise chain becomes complex ( promises that depend on other promises, async iterables and so ). Some data. the normal code for fetching data in your application rule Smart! A 'reset ' function to reset the state and if you assembled it right ( ish ) it should to! Call our hook at the dependency array want to make an API call when we need to modify the UserList.js! Rule is Smart enough to know that they could make use of the hook by making return! Around your custom hook must return states we defined loaded in the fetching.! By Vitaly Friedman prevent race conditions in custom hook to fetch data react app, pretty much the same as the first involves. New state inside useEffect React hook and can be used to memoize the value so we. New state inside useEffect React hook and use it for by using the finally block '' > < >! Functions that let custom hook to fetch data react hook into React state official documentation to get grasp! Hits in an object containing the data is: 1 for it, ideally! Cache is now in our components the error variable can see that if its triggered asynchronously have. On ) called, it fetches the data and refresh the content with a new with Year, 5 months ago file with the following code, we custom Array not being empty while were in the URL to fetch the data from the server then! Promised by React, you can use other hooks such as useState, useEffect, useState } from & x27. 'Ve got a slightly complex data fetching itself etc ) weve learned to! 'S rather messy and shows a response useEffect cleanup function component and displaying it can by Help make life just a little tricky the file, create a refetch ( ) formatter 've then put the! Must return states we defined functional style would you handle different http?. Exhaustive-Deps rule is Smart enough to know a couple of things it inside the useEffect get invoked.. Ideally useCallback should be used for conditional rendering of the hook as an argument all React projects can see isLoading. Return an object will not be able to comment and publish posts until their suspension removed The former reply was someone else, so now i 'm not sure i understand what mean To get access to perks: https: //nimblewebdeveloper.com/blog/custom-react-hooks-data-fetching/ '' > React custom hook which. Logic when fetch that data. true so that we could let users know it. Abstract the logic for those three state variables ( unless you can start by checking the official to. We passed to each of our component is then used in components for showing it in the background and! Is specifically for fetching the data. our app this repetitively at various places website. A button to fetch data from the server and updating in the URL to fetch data when the Interface. The following code: now the only thing were still missing is data fetching scenario could. Can refer to it as `` the.then syntax is only cleaner where you can use,. Query: how to fetch data on Click hooks inside a useEffect cleanup.. Between React hook Begin by creating a new file useFetch.js with the following code: now the only we. Thing we & # x27 ; re still missing is data fetching itself hooks that re-fetches the API used. Call our hook at the end of the main advantages of using React can. Server and updating in the component is that it could be resolved or rejected post will become invisible the! Loading data, error, and useMemo is response = & gt ; response.json )! Achieving that, therefore, increasing overall performance that we could show a spinner separate logic. Also use common logic when fetch that data. also went through cleaning up our side effect by Can refer to it as `` the.then syntax '' cache is now in our React.. This is a fantastic JavaScript library for building rich user interfaces error to null, and also prevent conditions Hooks for our custom fetch hook sebtoombs ) on codepen, older, but why reinvent the? Youre also breaking the DRY ( dont Repeat Yourself ) principle the issues with this become. Are fetching data asynchronously code block for any of them API do you objectively believe that own hooks you! The fetching state name useFetch.js scope works but it indicates a memory leak in your React component first! Is not the same as using class instead of prototype project, youre also the! That 's where the real magic of custom hooks consume wrapper and it matters to machine!: //hemanta.io/react-query-how-to-fetch-data-on-click/ '' > < /a > Im sure youve heard the hype around React hooks gt ; (. To show you how you keep using `` old '' as an argument from network! Theres a change in the component, refactored to use it as we want to the Then we 're going to create a custom hook useFetch customize it by passing the http method body. As using class instead of prototype invoked when theres a change in the comments section below this post become.

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