score:5
from the docs,
does useeffect run after every render? yes! by default, it runs both after the first render and after every update. (we will later talk about how to customize this.) instead of thinking in terms of “mounting” and “updating”, you might find it easier to think that effects happen “after render”. react guarantees the dom has been updated by the time it runs the effects.
you can provide the empty dependency array / []
as second argument to useeffect
, it is same as componentdidmount
which will executes only once in component life cycle.
useeffect(() => {
fetchdata();
}, []); //this will run only once
score:1
pass empty []
as an second argument to useeffect
method. it will be called on initial render, like below.
useeffect(() => {
fetchdata();
}, []);
Source: stackoverflow.com
Related Query
- React Hook useEffect : fetch data using axios with async await .api calling continuous the same api
- How to integrate axios api in react js with async and await using react hooks
- using useEffect in combination with Axios fetching API data returns null - how to deal with this?
- React component not re-rendering on URL parameter change when using useEffect hook to fetch data
- SetState with react hook and redux after async call to axios API
- Proper async await syntax for fetching data using useEffect hook in React?
- How to fetch data from a custom React hook (API) with onClick and display it in a Div using TypeScript?
- Trying to fetch axios data with redux, and load it in a component using useEffect
- Unable to access/manipulate data from weather API using axios with useEffect in React.js
- react fetch data from multiple apis with async await and hooks
- I'm trying to fetch data from a server using useEffect react hook
- React useEffect looping many times when fetching data and setState using fetch API
- How to use async await in React using the axios in the API call
- I'm fetching a problem when I'm trying to fetch data from an API by using useEffect in react
- Using React useEffect in a loop to fetch data from an API multiple times
- async await fetch api data in react
- react get data from rest api with axios and and useEffect redering empty array plus array with data
- React Hook useEffect async fetch data not passing to tooltip material ui component
- React error when trying to get data from api using useEffect hook
- ReactJS: how to call useEffect hook only once to fetch API data
- Uncaught TypeError: create is not a function using useEffect React Hook with AJAX request
- react native post form data with object and file in it using axios
- Multiple fetch data axios with React Hooks
- React useEffect hook and Async/await own fetch data func?
- Using different API url for development and production with React and axios
- Post an object with fetch using react js and express API server
- Right way to fetch data with react using socket.io
- displaying data from fetch api using react
- Fetch data with a custom React hook
- React useEffect infinite loop fetch data axios
More Query from same tag
- Change state object variable from form input - ReactJS
- React Typescript fetch: useState UseEffect pokeapi
- Cannot read property 'length' of undefined - React tutorial
- adding to an array using useState using the input value - React
- Error "Cannot find name CONTEXT" React Router 6 and useContext
- react dropdown using ref and select tag
- How to filter a list of cars using react-select
- Refresh or manual URL typing in SSR React App changes a className
- react-loadable component does not wait trigger to load
- How to convert json file?
- ReactJS 'Hello World' with JSX and classes prints nothing to browser
- ReactJS, multiple fetches and rendering the data
- Calculating average difference between date() entries in an array (in ms)
- How to update a single key value pair in an array of objects in react?
- Axios POST resolves to undefined
- How to use MediaQuery from react-responsive to hide only one JSX attribute?
- Why react won't set the state after Redux action trigger?
- React Material UI Tab custom css looks like a button
- Wrapping a MUI Button to set some default props
- Material ui icons
- Why does create-react-app creates both App.js and index.js?
- Add number of days to date saved in state
- how can I add a module style, via props other components
- Not getting a return from React-redux
- Cannot Create React App Using create-react-app
- Axios get data from API - React.js
- Datatable functions are not working with Reactjs
- How do I detect when router path '/' is true?
- Simple mail send with fetch js and php
- When should I add Redux to a React app?