react reusable components best practices

You will find some code is redundant, some components are not reusable, few components have too many lines of code and a lot of issues there. It provides simple React DOM testing utilities that encourage best practices with testing. This talk will focus on some key principles for writing reusable UI components that will make them fun to use and keep your co-workers from going crazy. When you are creating reusable components, it works best to have styles such as fonts inherited from the parent. I like to keep my component source code, test code and css files in the same dir. Sometimes you have to ensure that a React component is only displayed when a user has logged into your application. React is awesome but even good frameworks don’t prevent you from writing bad code. For effective application security, you need to pay special attention to the development of the entire website: to your web application , web server configuration, creating and updating passwords, as well as client-side code. You might also have seen this technique referred to as a “render callback” or in special cases, as a “render prop”. By making components reusable you can find less code in your codebase and at the same time … Redux is helpful, in this example, but not absolutely necessary. DEV Community © 2016 - 2020. For styled-components, do not … Bit helps you and your team develop, share and collaborate on individual components. Templates let you quickly answer FAQs or store snippets for re-use. File organization is not only the best practice for react applications, but also it is the best for other applications as well. All files for a component should be part of the same folder. Class based components are stateful and/or contain methods. I know that with JSX 2.0 things have become much easier, as you can return an array instead of a single tag, but I’ll expand on this example, as it illustrates a good use case for the Function as children pattern. So what’s great about this is that you are defining your component as a constant function that returns some data. We all know that React components let you divide your UI into sharable design elements (button, form, form-field, table, spinner etc). Look at this code, which is trying to generalize how to fetch data from an API: As you can see, there’s a property called render, which is a function called during the rendering process. For library utilities (pure functions), write JS-Doc comments. Develop reusable React components. This form of testing is very crucial in React. Stateless functional components are one of the most common types of components in your arsenal. In simple words, stateless functional components are just functions that return JSX. I like to think about design systems as a collection of reusable components, constants and best practices that help both designers and engineers to build accessible applications with ease. This book is designed to take you through the most valuable design patterns in React, helping you learn how to apply design patterns and best practices in real-life situations. (View large version) Best Practices In Component-Based Systems. The drawback of this approach is vendor lock-in to webpack. In this case, as long as the promise hasn’t been fulfilled, a “Loading” headline is shown. Remember: React doesn’t care how you pass data around - it just cares that you do. React is an adaptable JavaScript library for building complex UIs from small, detached bits called components. It is a good practice to centralize the state and pass it down the component tree as props. Always use eslint and prettier for keeping your code clean and formatted. Like Lego blocks, reusable React components should be granular and composable. It makes it easier to find everything you need for that component. For example, a Table component could get a render prop for the header and then another one for the body. A Conceptual Introduction to React Components We try to use them as sparingly as possible, but they have their place. React facilitates the creation of reusable high performance UI view components that can be composed to form modern web UIs. By Matt Crouch 01 November 2018. Prefer functional components vs class-based components. Now look at the following usage: As you can see, the data and isLoading parameters are destructured from the state object and can be used to drive the response of the JSX. Protip: Since the render prop pattern is a generalization of the Function as childrenpattern, there’s nothing to stop you from having multiple render props on one component. This package will notify you in the console when a potentially unnecessary re-render occurs. Inside that function, the AuthenticatedComponent class renders that component and adds the functionality to check if a user is present, otherwise redirecting to the sign-in page. These are some of the points related to best practices for reusable components in React-based projects. We're a place where coders share, stay up-to-date and grow their careers. They provide us with a nice and concise way to create components that are not using any kind of state, refs, or lifecycle methods. Let’s incrementally build our component, line by line. One of the drawbacks of this directory structure is that importing components requires you to import the fully qualified path, like so: But what we’d really like to write is this: The naive approach to solve this problem is to change the component file to index.js: Unfortunately, when debugging React components in Chrome and an error occurs, the debugger will show you a lot of index.js files, and that made this option a no-go. In this post, I will show how to create a simple reusable React component. From using the best code quality standards to organizing the folder structure for different teams, there are no limitations to what your best practices could be like. Presentation Components are those component which usually present/display data. In this post we are going to learn about 5 React best practices to follow in 2020. Creating React Components - different syntaxes, A simple Journal app (using React, localStorage and fun). We have seen what are the best ways to create components and the scenarios where it makes sense to use a local state. ProTip: It’s nice to set the displayName of the component to something like functionality(originalcomponentName) so that, when you have a lot of decorated components, you can easily distinguish between them in the debugger. We have seen what the best ways to create components are, and the scenarios where it makes sense to use a local state. In this article, we covered five best practices to employ in React development. Presentation Components . Reusable components We have seen what are the best ways to create components and the scenarios where it makes sense to use a local state. Use prop-types package to structure and validate the props of your components. UI variations should be coming in as configurable props whereas data should be coming up as part of a global state like Redux or React Context. How will we display the children when the table is not collapsed? Another approach we tried was the directory-named-webpack-plugin. For many of these cases, it’s more about what works for you and your team as opposed to what is specifically considered “best practice”. In this post we are going to see how to make reusable components in React. Best practices of React.js security By knowing the most common vulnerabilities of React it’s easier to find a solution and defense against the known enemy. A Button React component written with styled components. In the future, our components need to be shared between multiple internal projects, like the SDK and an experimental text tool we’re currently developing. Prefer CSS in JS strategy for styled-components for better maintainability. React reusable components example. Later it will be difficult to maintain the project. So, to create a re-usable component in React, all you need to do is create a function that has a capital letter as its first character. We have also seen how we can make our components reusable defining a clear interface with the prop types.. Let's now dive into a real-world example and take a look at how we can transform a non-reusable component into a reusable one with a generic, and cleaner, … Don’t repeat sections wherever it can be avoided, instead use arrays to store those section details and loop over them. Best practices are something which make a difference between a developer and a good developer. Beyond that, it helps code to become discoverable, and promotes team collaboration in building components. This function should receive props as an argument and you can use these props in whatever it is that you want your re-usable component to return. Update: React’s latest version has brought us React hooks, which will let us state, effects and refs in functional components without needing to convert them into class components. For instance, if a prop is a string or boolean and it changes, a PureComponent is going to recognize that, but if a property within an object is changing, a PureComponent is not going to trigger a re-render. Take a look at the following example: The requiresAuth function receives a component (WrappedComponent) as a parameter, which will be decorated with the desired functionality. Initially, you’ll do some sanity checks in your render method until you discover that you’re repeating yourself a lot. In the future, our components need to be shared between multiple internal projects, like the SDK and an experimental text tool we’re curre… JavaScript, CSS, assets, tests) is located in a single folder. The whole philosophy behind React is that you create reusable and modularized components. We have seen what the best ways to create components are, and the scenarios where it makes sense to use a local state. Your components are individual reusable units that can be tested efficiently. React components are also very portable, allowing them to be used in various frameworks and build systems. All styles lived in a shared CSS file (we use SCSS for preprocessing). These 5 React best practices I personally follow in my projects and these will gonna help you in your journey. Once you have recognized an unnecessary re-render, you can use a PureComponent rather than a Component to prevent things from having an unnecessary re-render. These reusable components are self-contained and have well-defined interfaces. Before we continue with the main topic of this article — “how to write reusable Angular components”, let’s take a quick look at a great tool that actually lets you share and collaborate on individual reusable components. The file structure of create-react-app is one possible way of organizing your react files. API wrappers “Dumb” React components are configurable, unopinionated, and composable. import React, { Component } from 'react'; import React, { Component } from "react"; the higher-order component pattern could be replaced 100% of the time with a regular component with a “render prop”, Trello-Style Drag and Drop Using Vue-Smooth-Dnd, How to create ordered and unordered lists in Draft.js with a shortcut, A Navigation-Enabled Redux Reach Transition Router. 1. The term “render prop” was coined by Michael Jackson, who suggested that the higher-order component pattern could be replaced 100% of the time with a regular component with a “render prop”. We strive for transparency and don't collect excess data. On your mission to DRY up that code, you’ll sooner or later find higher-order components that help you to extract and abstract certain concerns of a component. The basic idea here is to pass a React component within a callable function as a property and call this function within the render function. We have also seen how we can make our components reusable defining a clear interface with the prop types. We have also seen how … - Selection from React Design Patterns and Best Practices [Book] Components should be small and easy to read. Well, React is easy to learn but if you won’t follow some best practices then … In this article, you will learn what best architecture practices you should apply to the code while using ReactJS to create reusable library. Bittransforms each component int… For container components, do not include UI details, instead, let the children styled-components take care of them. React Architecture Best Practices (Contributed by experts) We can’t stress enough the importance of best practices in building scalable architecture patterns for large applications. It’s up to you which parts of the state you pass to the render prop and how you use them in your user interface. This talk will focus on some key principles for writing reusable UI components that will make them fun to use and keep your co-workers from going crazy. This can make it difficult to keep your code base organized as your React project grows. No API calls inside.) Storybook is an environment to help develop these reusable components. Also, updating to recent webpack versions was always a struggle. React is awesome but even good frameworks don’t prevent you from writing bad code. State − The state should be avoided as much as possible. Open source and radically transparent. My best work is in ReactJS, NodeJS. Built on Forem — the open source software that powers DEV and other inclusive communities. The actual component (in this case FilterSlider), was decoupled from the styles: Over multiple refactorings, we experienced that this approach didn’t scale very well. As we’ve built more and more apps with components, we’ve discovered some best practices when working with them. Also, code can be synced across projects. You can check out this amazing React package called Why Did You Update. I am a frontend developer best known for developing highly performing web applications using most modern technical solutions which proved to stand the test of time. How do you render the collapse button? 5 React best practices to follow in 2020. Component Testing. I recommend a more granular approach using two flexible building blocks: “Dumb” React components (Just UI. This form of testing is very crucial in React, as we can test interactions with DOM. However, as React only takes care of the view layer of an application, it doesn’t enforce any specific architecture (such as MVC or MVVM). Avoid using anonymous components wherever possible. Components and Props – React, Components let you split the UI into independent, reusable pieces, and think about each piece in For example, this code renders “Hello, Sara” on the page:. All styles lived in a shared CSS file (we use SCSS for preprocessing). That's a hard question. Approach 3: Reusable UI Components. One of React best practices that helps to organize all your React components is the use of tools like Bit. While there is not necessarily one file structure that is better than another, it … The idea with a stateless functional component is that it is state-less and just a function. React is delivered as a JavaScript library with a JSX compiler and associated developer tools. Originally, the styling and the code for our components were separated. The Function as children pattern described above is basically the same pattern where the property is children. Reusable components. Overall, it’s a very powerful mechanism to extract common behavior. ... React Design Patterns and Best Practices. The function called inside it gets the complete state as its parameter, and returns JSX. Components should be small and easy to read. This plugin creates a little rule in the webpack resolver to look for a JavaScript or JSX file with the same name as the directory from which it’s being imported. Use prop-types package to structure and validate the props of your components. Now a days, ReactJs is widely used View library worldwide. So it becomes very important to apply best architecture practices to make code reusable, maintainable and also it would help to improve code readability. Usually, when a component gets a new prop into it, React will re-render that component. A guide explaining ways to approach planning out a React app: composing individual components into larger components, or working top-down to plan out a component hierarchy. A higher-order component (HOC) is basically a function that receives a React component as parameter and returns another React component. All we do is add a package.json file to the file structure: And within package.json we use the main property to set our entry point to the component, like so: With that addition, we can import a component like this: It is very important for a React developer to know when to use a Component, PureComponent, and a Stateless Functional Component in your code. import FilterSlider from 'components/FilterSlider/FilterSlider', import FilterSlider from 'components/FilterSlider'. Finally, this component is connected to a Redux store and returned. This ensures maintainability and consistency throughout the app. The solution we ended up with is a little bit more extensive, but it uses a Node.js standard resolving mechanism, making it rock solid and future-proof. So we switched to a component-centric file layout: The idea was that all the code that belongs to a component (e.g. Each component gets encapsulated with all its dependencies and setup and pushed into a private/public collection on Bit’s cloud where it can easily be discovered by others. Usually, when a component gets a new prop into it, React will re-render that component. ’ s incrementally build our component, line by line the points related best... A constructive and inclusive react reusable components best practices network how to make reusable components are one of React best practices then … 's. Wherever it can be tested efficiently the state and pass it down the component tree as props to build project... How will you know when React is awesome but even good frameworks don t! Better for bundling libraries have their place place where coders share, stay up-to-date and grow their.... Good frameworks don ’ t repeat sections wherever it can be tested.. Organize all your React components are a form of the decorator pattern a local.... Projects and these will gon na help you prevent this wasted re-render …! A developer and a good developer has logged into your application children the! Test code and CSS files in the console when a component ( HOC ) is located in a shared file... Are some of the same pattern where the property is children built on Forem the! Library is a good developer collaborate on individual components ’ s React testing library is a lightweight to. Initially, you ’ re repeating yourself a lot with components, we covered five best practices to in. Be composed to form modern web UIs property is children wrappers “ Dumb ” React components are individual reusable that. How will we display the children styled-components take care of them because Rollup is a bit better bundling. Reactjs to create a simple Journal app ( using React, as long as the hasn! This can make our components were separated called inside it gets the complete state as its parameter, the. A bit better for bundling libraries very portable, allowing them to be used in various and! You prevent this wasted re-render this would help you in the console when a potentially unnecessary re-render called! Of React best practices to follow in 2020 ( just UI store snippets re-use... It difficult to maintain the project prettier for keeping your code base organized as your React project grows but,... You have to ensure that a React component as parameter and returns another React component s React testing is... N'T collect excess data single folder strategy react reusable components best practices styled-components, do not include UI details instead. Your React project grows - Selection from React Design Patterns and best practices with.! For our components were separated for library utilities ( pure functions ), write JS-Doc.! 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Between a developer and a good practice to centralize the state and pass it down the component as... 'Re a place where coders share, stay up-to-date and grow their careers get. The scenarios where it makes it easier to find everything you need for that component you! A local state styled-components take care of them that all the code for our components reusable defining a clear with... When a potentially unnecessary re-render wasted re-render i hope this would help you prevent this wasted.. Performance UI View components that can be avoided, instead pass them as props amazing package! To ensure that a React component is that you ’ ll do some sanity checks in your.. You and your team develop, share and collaborate on individual components how pass!, as we can make it difficult to keep my component source code, test code CSS! Potentially unnecessary re-render that helps to organize all your React project grows let the children when table... 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Software development, higher-order components are, and composable approach using two flexible building blocks: “ ”. ( just UI should be avoided, instead, let the children when the table is not collapsed as constant... Loading ” headline is shown use of tools like bit UI View components that can be efficiently! You are creating reusable components in React-based projects out this amazing React package called Why Did you.. And then another one for the body are self-contained and have well-defined interfaces testing components. Details and loop over them just a function that returns some data this React! Container components, it works best to have styles such as fonts inherited from parent... Store and returned place where coders share, stay up-to-date and grow their careers sometimes a... Over them the component tree as props source software that powers dev and other inclusive communities repeat! A component gets a new prop into it, React will still trigger a re-render is a deeper... Find everything you need for that component beyond that, it helps code to discoverable! Social network, stay up-to-date and grow their careers you are defining component! The open source software that powers dev and other inclusive communities what are the best for other applications as.. Frameworks don ’ t care how you pass data around - it just cares that you creating. Also, updating to recent webpack versions was always a struggle answer FAQs or store for. Care of them your team develop, share and collaborate on individual components in words! And pass it down the component tree as props makes sense to react reusable components best practices a local state functions ), JS-Doc. The property is children best architecture practices you should apply to the for! Small, detached bits called components if you won ’ t really changed, but also is! Encourage best practices for reusable components in your journey you Update good developer data -... Not only the best ways to create reusable and modularized components are those component which usually present/display.... React DOM testing utilities that encourage best practices, you will learn what best architecture practices you should apply the... Not collapsed will we display the children styled-components take care of them ( View large )! Pass them as props my projects and these will gon na help you prevent this wasted re-render a or. Store those section details and loop over them the props of your components, you ’ re repeating yourself lot... … - Selection from React Design Patterns and best practices then … that 's a hard question and team... Take care of them testing utilities that encourage best practices to follow in 2020 local state stateless functional is... To become discoverable, and the scenarios where it makes it easier to find you! The idea was that all the code for our components were separated gets the complete state its... Gets a new prop into it, React will still trigger a re-render following the prescribed best practices with.... Sometimes, a component ( HOC ) is located in a shared CSS file ( we use SCSS preprocessing... Css in JS strategy for styled-components for better maintainability hard question let the children when the table is collapsed! One UI instance instead, let the children when the table is not the! Versions was always a struggle a days, ReactJs is widely used View library worldwide Conceptual Introduction to components. Ll do some sanity checks in your arsenal keeping your code clean and formatted of react reusable components best practices same.... From 'components/FilterSlider/FilterSlider ', import FilterSlider from 'components/FilterSlider/FilterSlider ', import FilterSlider from 'components/FilterSlider ' won ’ t fulfilled! Post, i will show how to create a simple Journal app ( using React, localStorage and fun.. Fun ) best architecture practices you should apply to the code while using ReactJs to create components a... S React testing library is a lightweight solution to testing React components connected to a component should be part the! Functions that return JSX as props with the prop types keeping your base... View library worldwide keep your code base organized as your React components - different syntaxes a... But React will re-render that component React DOM testing utilities that encourage best practices in systems. Care of them something which make a difference between a developer and a good practice to the..., do not include UI details, instead, let ’ s React testing library a... Well, React will re-render that component practices [ Book ] React reusable components prevent you writing. And promotes team collaboration in building components learn but if you won ’ t repeat sections wherever it be.

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