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If it looks familiar that's because it is. That is to create multiple components and render them based on some conditions. If a component has a conditional rendering based on a string, it makes sense to describe the interface of the component with TypeScript:A switch case is a good start for multiple conditional renderings.

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Swift and VR/AR hobbyist. 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. Actually it's possible with a conditional rendering function which is self invoking:Optionally make the switch case more concise with an conditional rendering arrow function:In conclusion, the switch case operator helps you to have multiple conditional renders. Rendering React components is very important since it can make your app behave faster or slower, depending on your approach for rendering components, re-rendering components based on condition or state/props change.Here are a few methods you can use to render React components:Returning null from a component’s render method does not affect the firing of the component’s lifecycle methods.Functions that are executed immediately after they are defined:© Modern React Course for Full Stack Web Developers{"cookieName":"wBounce","isAggressive":false,"isSitewide":true,"hesitation":"500","openAnimation":"fadeIn","exitAnimation":false,"timer":"","sensitivity":"","cookieExpire":"7","cookieDomain":"loadfocus.com","autoFire":"","isAnalyticsEnabled":true} In this example, we have done the conditional rendering based on props, but the conditional rendering could be based on state and hooks too. For now, let’s continue to improve this example.The operator is wrapped in curly braces, and the expressions can contain JSX, optionally wrapped in parentheses to improve readability. Stack Overflow works best with JavaScript enabled

A switch case cannot be used within JSX; can it? Conditional rendering as a term describes the ability to render different UI markup based on certain conditions. If we would still rely on the text property from before, we could use a conditional rendering with a function to retrieve the value too:After all, the enum conditional rendering in React is more elegant than the switch case statement. If the condition is false, React ignores and skips the expression:Now there might be cases where you have multiple conditional renderings. There is no need to add templating components to enable it. #1 If – one of the most popular when using Conditional rendering React. A HOC hides away all the noise from your actual component. In other words, Hooks are functions that let you “hook into” React state and lifecycle features from function components. - Permutations of booleans are possible too:The last example is a bit over the top though and I wouldn't advice to use it.

Consider a complex, nested set of conditions:This can become a mess pretty quickly. In React, conditional rendering works the same way as the conditions work in JavaScript.

Even though the previous example shows you how to use if else statements in React, I suggest to use single if statements every time you want to guard your main return (here: returning the list) as a best practice:This is way more readable than the previous if else conditional rendering.

However, most of the time, the differences don’t matter a lot.But when they do, you’ll need a good understanding of how React works with the virtual DOM and a few tricks to 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.

But here, I’m going to do something a bit different to show you how you can go from an imperative solution to more declarative and functional solutions.As properties, it receives everything it needs to work. I’m going to remove Using a ternary operator, you can declare one component to render either a save or edit button by changing its handler and label correspondingly:As mentioned before, this operator can be applied in different parts of the component. Best practices for react conditional rendering? We know it from Vanilla Javascript and it's called the and operator. When a component has a conditional rendering, the appearance of the rendered component differs based on the condition. I recommend reading. In other words, based on one or several conditions, a component decides which elements it will return. Consider these two components: But is it the best way to do that? My file structure is:Right now I'm leaning towards option 3, but I can't find any evidence with my Google searches of this being a recommended practice. A common practice in React applications is to render certain components based on certain conditions. It can also be applied in different parts of the component.Let’s apply it to the example so you can see this in action. And, as with most things in programming, some are better suited than others depending on the problem you’re trying to solve.This tutorial covers the most popular conditional rendering methods:As an example of how all these methods work, a component with a view/edit functionality will be implemented:Let’s start with the most naive implementation using an if/else block and build it from there.You’ll use one property for the saved text and another for the text that is being edited. The Overflow Blog Depending on various criteria in the parent, I want to display one component and not the other and vice versa.

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