Tag: use-effect

Question: The useEffect React hook will run the passed-in function on every change. This can be optimized to let it call only when the desired properties change. What if I want to call an initialization function from componentDidMount and not ...

Question: With React 16.8.6 (it was good on previous version 16.8.3), I get this error when I attempt to prevent an infinite loop on a fetch request: I’ve been unable to find a solution that stops the infinite loop. I ...

Question: I have the following problem. I have a component which needs to call an API when mounted. I do the call in a useCallback like this: And then I call this function inside of a useEffect like this: The ...

Question: I’m trying to rerender my component every 5 seconds. The problem occurs when I open the page the first time- it shows after 5 seconds. How should I make sure to make my component visible instantly after page is ...

Question: I have a loop that will generate an Array with multiple datas. I do this loop in useEffect like this : The console tells me : I tried many ways to set my state differently but no success. How ...

Question: My code is going to be quite explanatory in itself. My code gives customer is undefined error. This is happening because useEffect hook is not executing before return is being executed. How and why is this happening and how ...

Question: I am attempting to show an image in a random position according to dynamic dimensions using a ref. However, when getting the useRef’s current value, I recieve undefined likely because the useRef’s target div hasn’t loaded yet. To overcome ...

Question: I am new to react state hook. Here is the sample code: If I click the button. The console always output 0 instead of 1 where i set the value in useEffect. Please let me know what’s wrong here. ...

Question: I’m having an issue getting my “topic” state to update when using Axios. At first I thought useEffect wasn’t being called but when I put a simple useEffect(() => setTopic("Test")) in it worked fine. So somehow I believe the ...

Question: I am creating a random quote generator. Everything works fine. But the quote doesn’t appear at the page reload. I have to click new quote button to get a new quote. It should also display a quote when the ...