11/14/2023 0 Comments Java script onclick bug squishWhen the state changes at top-order components, all components below it rerender. React usually rerenders the entire subtree instead of rendering only the relevant nodes: Imagine that the application receives new data and the following nodes, in yellow, need to update: When updating the state or props, React must generate a new tree with minimal changes and keep things predictable.įor instance, the tree can look like this: On each component render, React generates a tree that’s composed of UI elements, and the leaf nodes are the DOM elements. Let’s look at how React handles this under the hood. The usual culprit that causes performance issues is the reconciliation process that React uses to update the virtual DOM. Since it’s easier to scale React compared to other frontend platforms, developers don’t need to rewrite entire modules to make things faster. But, before using these new optimizations, it’s often best to wait to see the actual performance. React is known for its speed and new optimizations are often added to each new update. In this article, we’ll review five generally accepted development practices that you can actually avoid when using React, why they’re avoidable, and alternative approaches that accomplish the same thing. Some of them can compromise performance, readability, and make things unproductive in the long run. In fact, sometimes best practices aren’t so great. It’s a fair question to ask - there isn’t always a firm “right” way of doing things. There is a tremendous amount of interest in React, and new developers are brought to the platform because of its UI-first approach.Īnd while both the library and the entire React ecosystem have matured over the years, there are certain instances when we wonder, “What’s the right way to do this, exactly?” However, it may still contain information that is out of date.Īt this point, React is one of the most loved libraries on the planet. 5 things not to do when building React applicationsĮditor’s note: This post was last updated on 13 August 2021 to reflect any changes in technologies mentioned or updates to code.
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