swr | React Hooks for Data Fetching | Frontend Framework library
kandi X-RAY | swr Summary
kandi X-RAY | swr Summary
SWR is a React Hooks library for data fetching. The name “SWR” is derived from stale-while-revalidate, a cache invalidation strategy popularized by HTTP RFC 5861. SWR first returns the data from cache (stale), then sends the request (revalidate), and finally comes with the up-to-date data again.
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Lines of Code : 249License : Permissive (MIT)
Copymeson --buildtype=release -Degl=false -Dgallium-vdpau=false -Dgallium-xvmc=false -Dgallium-omx=disabled -Dgallium-drivers=swrast,swr -Dplatforms=x11 -Dglx=gallium-xlib -Dopengl=true -Dvulkan-drivers= -Dtexture-float=true -Dosmesa=gallium -Ddri-drive import useSWR, { SWRConfig } from 'swr'
import { useAuthActions } from 'use-eazy-auth'
import { meCall, refreshTokenCall, loginCall } from './authCalls'
function Dashboard() {
const { data: todos } = useSWR('/api/todos')
// ...
}
function Confi import { createSWR } from 'sswr'
const swr = createSWR({
// Configure a global fetcher for all SWR hooks. This
// can be replaced with anything that returns a promise
// with the data inside, for example: axios.
fetcher: (key) => fetch(ke Community Discussions
Trending Discussions on swr
QUESTION
I have a simple master-detail scenario where on the left side, I load a list of cities using useSwr with a REST service, then on the right side I have a city detail windows that also uses useSwr to load a single city (either from clicked on left, or first load).
In the code below, I'm calling the useEffect function, and then using the data retrieved from useSwr in a state setting call (setSelectedCityId).
This works, and there has always been data associated with the cities array, but I'm wondering if it is guaranteed that useEffect's function will run AFTER the Suspense promise is completed (like it seems to be).
Here is my simple code:
...ANSWER
Answered 2022-Apr-11 at 16:29Yes, in React 18 useEffect always runs when the tree is consistent. So effects fire only after the tree is ready and not suspended.
QUESTION
I was under the impression SWR should return the stale data on page load before updating the view with the new info from the API.
I have made a basic Nextjs app with simple API timeout and it's "loading" - for the 5 second timeout I have added to the API - every time. I was under the impression it should serve the previously cached version before updating once the API call returns?
Vercel URL - https://swr-test-mkhx72bz3-webknit.vercel.app/
repo - https://github.com/webknit/swr-test
index.js
...ANSWER
Answered 2022-Mar-19 at 00:55I'm no expert but by "every time" do you mean every time you reload the webpage? SWR wont cache the value between refreshes of the webpage for you.
Cache in this context means that two components using the same swr key ('/api/hello') will result in just one call to the api. So which ever component calls the swr first will get the api response, and the second component will get the same value from the cache.
But swr can still call the api multiple times later on to "revalidate" and send the updated response to both (or all) components that use that key.
QUESTION
The useSWR hook from swr works everywhere if I explicitly enter the fetcher.
ANSWER
Answered 2021-Oct-22 at 18:07Your First.getLayout property should be a function that accepts a page and returns that page wrapped by the HeaderLayout component.
QUESTION
You guys know what may cause this error? Help will be highly appreciated. This error suddenly started and can't figure out why. Any source I find related to this topic also didn't help, such as npm clear cache etc.
...ANSWER
Answered 2022-Feb-05 at 04:11try revert "next" back to 12.0.9
QUESTION
I'm looking for a way to have a dynamic route that displays for every document in a Firestore collection using Server-side Rendering.
For example, a document called foo would exist at test.com/foo under the [doc] page component. Any time a document is added, it should be able to be accessed through its respective URL.
I've tried this method but I haven't been able to get it to work.
I've also tried implementing getServerSideProps but have not had much success, any pointers would be appreciated.
Code from the method above as follows:
under pages/api/[doc].js
ANSWER
Answered 2021-Sep-04 at 18:17You can try using getServerSideProps:
QUESTION
I am trying to set some UI state that is dependent on if a user is logged in. If a user is logged in, some state in the UI should reflect this.
I am using SSG to statically generate pages and SWR to fetch the user data. When I call my fetcher function and try to call my custom hook to check if the user is logged in, on the initial request, the user is undefined, but when I reload, the user is present.
Why is this the case? Is the fetcher function called before anything else and how can I fix this.
Basically, all I want is to SSG the [parkCode].js pages and fetch some user data to display user specific state.
Here is my code:
...ANSWER
Answered 2022-Jan-13 at 09:44When the page is first rendered, the user variable still has its initial state (null), as the checkUser hook useEffect hasn't run yet. This means that when useSWR('park', fetcher) is called, the user inside the fetcher method will also be null. To prevent this behaviour, you can conditionally fetch the data in the useSWR call only when the user is set.
QUESTION
I'm making this site using Next.JS hosted @ Vercel. One of the packages I'm using is a custom one that I've forked, updated it in my project and after the build, was able to make it work locally. I posted a question here about it.
However, deploy is failing on Vercel's side with a message complaining that that same custom module I'm using couldn't be found. Everything works fine locally.
...ANSWER
Answered 2021-Dec-31 at 07:59There @react-headroom dependency in your package.json points to a github link rather than a dependency version. That seems to be the issue.
QUESTION
I have wrapped the SWR into a custom hook:
...ANSWER
Answered 2021-Dec-30 at 16:19useSWR's first arg should be key.
QUESTION
I'm building a blog website in Next.js, the API for the blog is from some headless CMS.
In a page I want to do the following:
- List some blogs.
- Set of buttons available, based on each button click different set of blogs are loading (should replace the blogs in #1).
Since SEO is needed I'm pretty confused to use which approach should I choose.
What I thinking that I generate the initial list with
getStaticProps (Static Generation), and after loading I want to replace the blogs based on user action (button click).
But I'm confused, is it possible to use static generation and SWR in single page?
Here is my implementation.
pages/index.js
ANSWER
Answered 2021-Dec-28 at 14:55In the FeaturedBlogs component, you can create a state variable to keep track when a new category is selected on the client-side.
QUESTION
I want to put swr data into setState[]
I have code like this.
ANSWER
Answered 2021-Dec-15 at 08:01You don’t need to do this. The data is already part of the component’s state, and SWR is managing it for you. You don’t need to transfer the data into another state variable.
Use data anywhere you were expecting to use contents, and it will work as you expected. You can choose a different name for the variable if you like:
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