Conditional rendering in React works the same way conditions work in JavaScript.

So, you can also make it reusable when you want to render it conditionally.You can define the enum in seperate file and export it like this.Then, import it when you want to use it in a component.Higher Order Component (HOC) can be used to implement conditional rendering in React. In javascript, we usually write conditional rendering with “if else” statement, “switch case” statement, and ternary operator.All of these methods are applicable to React. It is the better alternative for switch-case statements in JSX markup.As you know before in the 5th method, you should wrap the switch-case statement inside IIFE in JSX. In this post, we’re going to discuss all of the methods that we can use to write better code for conditional rendering in React.Conditional Rendering is a common feature that exists in every programming language, including javascript. React Conditional Rendering Techniques & Best Practices.

Based on the example of the article, I created two JSFiddles. I would like some advice as to the best practice when conditionally rendering an element or component in react-native. This way, only a one part of your JSX is conditionally rendered, while other parts can stay intact without any condition. Use JavaScript operators like if or the conditional operator to create elements representing the current state, and let React update the UI to match them.

Each one of them has its own advantage in some contexts.This is the first method that all programmers know, the common if-else statement. We hope this article sheds some light on ReactJS best practices and patterns that are very popular in 2019. Conditional Rendering in React… The essential idea is that changing the position of the components due to conditional rendering can cause a reflow that will unmount/mount the components of the app. in Web/Mobile App Development. Conditional Rendering with If Else Best Practices Summary. by Minh Le Xuan. One of React best practices is to keep your stateful data-loading logic separate from your rendering stateless logic. Then, you can render only some of them.

Comments. Syakir Rahman is a 4+ years experienced full-stack developer, blogger and founder of Devaradise. Use anywhere outside JSX markup; Or when you want to execute more than one line of code inside if-else block ~~ This is the first method that all programmers know, the common if-else statement. When we’re developing a React application, we often need to show or hide an element given a certain situation. Here’s a good article about optimizing conditional rendering in React — I totally recommend you read it. With an enum object, you don’t need to do that.Let’s take the same example as before. or some thoughts about the methods above?Get notified via email when new post like this published! We can use it anywhere in a React project.In React, using the common if-else statement is the best when you want to execute more than one line of code inside if or else block, or anywhere outside JSX.For example, we want to execute some codes if user is logged in.Or when you want to define accessible contents based of user role.if you only want to execute one line of code, like calling a function inside if or else block, you can remove the brackets like this.Condition in if-else without brackets only applied to one line of codes right below it.As you might know, we can inject and mix some javascript codes in JSX inside brackets { }.

But the question is, How we can use them effectively?As you might know, React has JSX markup that often we need to implement conditional logic for component there. The ternary operation makes the conditional rendering in React not only more concise, but gives you an easy way to inline the conditional rendering in your return.