There we have react.Fragment vs div, if you want more like this be sure to check out some of my other posts!Īnother article that might interest you is one I have recently written about React.Fragment vs, be sure to check it out. This comes in handy when you are looping over data and creating components off of them so that you can then avoid creating additional HTML DOM elements for each one and you can just provide your key to the React.Fragment directly instead. One of the few attributes/props that a React.Fragment will support is the key prop. Fragments let us deal with this problem in a very effective way. The component must return at most 1 top-level node. When returning JSX from a React component we need to maintain the tree structure of the HTML elements. Before, React forced us to return an element wrapped. ![]() Once again there is an exception to this which is when it comes to React keys.Ī React Key is just a way that React can track components in lists across renders to prevent strange behavior ( read more about keys here). It’s is a common practice in React to render dynamically multiple sibling components. Since version React 16.2.0 we are able to return arrays and strings from the render method. Where a React.Fragment does not get rendered into the DOM it can’t support these things and you will therefore have to make use of an actual html element such as a div. There might be many edge cases to this but some of the main situations that this might occur is when you need to apply styling, add event handlers or add attributes to the root element. When to use a div over a React.FragmentĪs mentioned in the above section, sometimes you can’t always use a react fragment in place of a div because there might be certain things you need the wrapping element to have.Īnd these are the times when you will want to make use of a div (or any other relevant html element) over a React.Fragment. The problem is, it is not always possible to use a React.Fragment in place of a div element because there might be certain things that you will need the wrapping element to have which we will get into in the next section.īut for the most part if you just need to group some components or elements together in a React application then React.Fragment is almost always the better choice to reduce the overall DOM size. When to use a React.Fragment over a divįor the most part it is safe to assume that you will always want to use a React.Fragment over a div wherever possible in order to keep the size of the DOM down. Whilst this is only a small difference here, when looked at across an entire React application it can make a big difference. We can also use, instead of React.Fragment but this shorthand syntax does not accept key attributes.As you can see by using the fragment we have been able to remove the additional div element from our DOM tree. Keys are used for mapping a collection into react fragments, like creating an inventory of descriptions. The shorthand syntax cannot allow keys as attributes. So with ReactJS 16.2 version, we will use the React.Fragment which will remove the need to use an extraneous tag. Why We Use React Fragments The main reason to use fragments tag is: It gets executed faster than div tag or DOM elements. In the above example, we have to use an extra tag to wrap the children JSX elements. ![]() React fragments are introduced in version 16. What comes to your mind when React 16 comes up Context Error Boundary Those are on point. React Fragment is a react component which helps us to return the multiple child elements without using the extra dom nodes. The following sample code shows how to create a simple React application without React Fragments. Render Children in React Using Fragment or Array Components. ![]() ReactJS Fragments were introduced with React 16.2 version to remove the need to define an extra tag which also takes extra memory. React Fragments can be used whenever there are multiple elements, and they need to be wrapped in an enclosing tag. While building a ReactJS application, all the JSX code needed to be wrapped down inside a parent tag.
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