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#Key on react fragment plus#

What do you think about React fragments and are you using them in your own projects? Please leave a comment below, I would love to hear from you!Īlso remember to subscribe to my newsletter, to stay tuned on the latest news and posts about modern web development.

#Key on react fragment plus#

So the fact that fragments eliminate the wrapper div which can cause problems with invalid HTML and with styling of the components plus the fact that they are faster and the DOM is less cluttered, I’d say they are worth using.

Some CSS mechanisms like Flexbox and CSS Grid have a special parent-child relationship, and adding divs in the middle makes it hard to keep the desired layout while extracting logical components.

This only has a real benefit on very large and/or deep trees, but application performance often suffers from death by a thousand cuts.

It’s a tiny bit faster and has less memory usage (no need to create an extra DOM node).

So are fragments worth using instead of say a wrapper div?ĭan Abramov answered this question on StackOverflow: It would probably look something like this.Įnter fullscreen mode Exit fullscreen mode This kind of behaviour results in useless markup and sometimes even invalid HTML to be rendered, which is bad.įor example we could have a component Table that renders an HTML table and inside that table the columns are rendered with another component called Columns. In most cases the wrapper div is “irrelevant” and is only added because React components require you to return only one element.

Usually these elements are wrapped for example inside a div. So what are they and should you start using them? The answer to the latter is YES and the answer for the first question is what this blog post is going to tell you.Īre you new to React? Be sure to read my post 6 Things Every Beginner React Developer Should Know.Īs the React.js docs state, a common pattern in React is for components to return multiple elements. Even though they have been around for a while now, many React developers I have talked to haven’t started to use them yet and the number one reason for this usually is that they have heard of them but haven’t got around to learn about them.

React Fragments were introduced in React 16.2.0.