What we can do is, we can create a simple JavaScript component, just to wrap all of the child elements. There are two solutions for this problem, the 1st one is just for an explanation of how it works, and the 2nd one is the actual solution. So, now let me introduce the solution to you. Then you might say, in what parent element should we wrap all the child elements? And that is a valid question. We might not see the problem, but behind the scenes, there's a big issue that you might want to fix & can affect your site performance. It's not considered a better practice, as per the performance perspective, because, React will render these divs. React Fragments Example 3 by SitePoint ( CodePen.Whenever creating new components, we need to wrap each and every element inside a parent element, precisely a div.īut, when our app gets large, there are now too many components, and too many divs, this can cause a div soup. This is where React Fragments can come into play, allowing you to more easily render groups of elements and avoid adding unnecessary extra tags, just like in the following example: When it comes to conditional rendering, React requires you to return a single element in both branches. React Fragments Example 2 by SitePoint ( CodePen. Since React Fragments support the key props, you can harness them to achieve so without introducing any extra markup. This can be achieved by mapping each array element to a corresponding HTML element, which is required by React to have a unique key. Your goal is to render all authors using the data in this array. Please note that this is not the case while using the short syntax.įor example, let’s say you have an array of objects where each element represents an author. React Fragments Example 1 by SitePoint ( CodePen.Īs stated in the React documentation, Fragments declared with the explicit syntax may have keys, and this is useful when dealing with any JavaScript collection. Let’s see them in action while defining a component returning four HTML elements. As seen before, this is the recommended approach, since using any other wrapper tag can lead to invalid HTML. Whenever you have to define a React component that needs to return multiple HTML elements, you should wrap them with the or tag. Wrapping multiple HTML elementsĪs you might have guessed, wrapping multiple HTML elements is the most common use case of React Fragments. There are three use cases where React Fragments are commonly used. On the contrary, see them as a way to avoid unnecessary tags and to get a better markup structure as a result. So, don’t think of Rect Fragments as a replacement for the s in your HTML. īasically, you should use React Fragments any time you would otherwise introduce an unnecessary wrapper to make your component return more than one HTML element. So, keep in mind that the empty tag is a shorthand for. This leads to the same result as the example above. Here’s the code you might use for this: function Table ( ) Second, such an approach can lead to invalid HTML, as you’re going to see.įor example, let’s say you have a Table component which renders an HTML table, whose columns are rendered with another component called Columns. First, by using this approach consistently, you’re making your DOM more nested, and consequently slower to be rendered. From a logical point of view, this extra can usually be considered irrelevant, but it does have consequences. The easiest solution would be to use a wrapper. This is because React requires that components return only one HTML element. To achieve this, you must wrap all these elements with an HTML tag. As stated in the official React documentation, returning more than one HTML element is a commonly desired behavior for React components.
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