I have an array of integers from 0 to 6 as input I need to return an object with the count of each of those numbers but I can’t do the function for the set of values I am expecting this Can you help me? Thank you very much Answer You can use reduce()
Tag: setstate
How to perform React state update after a form submission and API fetch
I have React class component called SearchLocationForm.js which is a child of App.js. Inside of the SearchLocationForm.js I have this code below I am trying to figure out how I can use the setState() method to update the component state with the API response, and afterwards lift that up to the App.js component in order to make subsequent calls. I
React useState, setState and {state} in return
I come across the rendering issue with React State. The problem is that {state} in return get value one beat late. But the console log in handleChange shows right value. If the previous value of state is 9, current value of state value is 10 then the console.log({state}) in handleChange shows 10 and the <span>{state}<span> in return shows 9. It
Cant Update my state using setstate for paypal paiment
So my problem is that i update my state but when i try to use it to approuve my payment the OrderUrl is empty i undestard that setState is asynchrone but how can i avoid this case and update my state immediately. i have this problem like in two or three page in my website, and i already did some
SetState inside useEffect is causing side effects on select input functionality
Each select menu comes with a help text inside a box. Similar to a tooltip. User can close them when clicking ‘close button’ or clicking outside. My solution works and they are being closed each time you click outside them. The problem is that setState inside the useEffect has a side effect on the select menus. The issue is when
REACT : getting error while re-rendering components using setState hook
I’m trying to change an inline style property of several items that have position info stored in a useState hook as well on the style property of each item rendered. I wanted to change the CSS value of all the items except the one I clicked on. I devised a function to do so, however when I try to update
react native useEffect run into dead loop:
} after the code is executed ,the terminal continues showing : i have confusion about this ,useEffect function should be rendered once .However ,it seems continuing to be redered . Answer You did not add a dependency array to the useEffect function. Therefore, it is bound to be an infinite reRendering. And react does not recommend let. Use the status
Too many rerednders error by trying to show a FlatList
I am trying to display a flatList of numbers like this : (image of what the flat list would look like) To do that I did an array of objects with a numberName and a key, it’s generating with a loop: I dont think the problem is in the loop, but react is recalling the loop without showing the component.
Data fetched and set with setState inside useeffect doesnt appear in console log unless i set a timeout
So I am fetching data from my database for each item in the array groups and then I want to map through this data (twice because it’s an array inside an array) in the jsx part of the component. The problem though is that the state is changed “too late” This is my guess because the console log doesn’t show
React setState not updating
In this code in the else block, when the setState function is called, the state doesnot change Note: Even if it is asynchronous it doesn’t change it all after a long time Could this problem be because of the ES6 destructuring of the state EDIT I logged and checked with a callback and still the state remains unchanged Answer You