useIsomorphicLayoutEffect React hook #69
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The Back Story about your Javascript Metaphor
Check this gnarly snippet, dudes and dudettes! We've got ourselves a rad custom hook called
useIsomorphicLayoutEffect
that's ready to shred. This bad boy is like an isomorphic version ofuseLayoutEffect
and can rock out in both server-side rendering and client-side rendering jams. 🎸The javascript Story!
The hook
Usage
This snipp defines athe hook
useIsomorphicLayoutEffect
. The purpose of this hook is to provide an isomorphic version of theuseLayoutEffect
hook, which can be used in both server-side rendering and client-side rendering environments.To understand why this is useful, let's first take a look at the difference between
useLayoutEffect
anduseEffect
.useEffect
is a hook provided by React that allows you to perform side-effects in a functional component after the component has rendered. This can include fetching data from an API, updating the DOM, or subscribing to events.useLayoutEffect
is a similar hook touseEffect
, but it runs synchronously immediately after React has performed all DOM updates. This means that any updates to the DOM made byuseLayoutEffect
will be visible to the user before the browser has a chance to paint the screen. This can result in a smoother and more responsive user experience, but it can also cause performance issues if the updates are too heavy.Now, let's say you are building a React app that needs to support both server-side rendering and client-side rendering. In a server-side rendering environment, there is no browser DOM available, so running
useLayoutEffect
would cause an error. However, you still need to perform some kind of side-effect to ensure that the component renders correctly on the server.This is where
useIsomorphicLayoutEffect
comes in. By usingtypeof window !== 'undefined'
to check if the code is running in a browser environment,useIsomorphicLayoutEffect
can switch betweenuseLayoutEffect
anduseEffect
depending on the environment. This means that your code can be written once and used in both server-side and client-side rendering without any issues.Example
For example, let's say you have a component that needs to fetch data from an API and render it to the DOM. You can use
useIsomorphicLayoutEffect
to perform the fetch on the client side usinguseLayoutEffect
for a smoother user experience, while usinguseEffect
on the server side to ensure that the component renders correctly:fetchData
is a function that returns a Promise that resolves to the data we want to render.useIsomorphicLayoutEffect
is used to perform the fetch on the client side usinguseLayoutEffect
, while usinguseEffect
on the server side. Theif (!data)
check ensures that the component displays a "Loading..." message until the data has been fetched and rendered to the DOM.A Javascript demo/repos link
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PayPal Link for Donation (Javascript Storyteller)
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