I’m new to react functional components and I’m trying to get the weather data on multiple cities on page load but useEffect is now re-rending each call. How can I write this so useEffect doesn’t cause re-renders? Answer You can make the fetchData function to return the data you need without updating the state, then you can fetch x amount
Tag: react-hooks
Cannot read property ‘length’ of undefined – after pressing ‘Enter’ key the value become undefined
Why when I’m pressing the Enter key the value of idNumber becomes undefined ? If I click on the button calling checkID() it shows the input’s string length in the console.log(idNumber) It’s just so weird Thanks for everyone. Answer You shouldn’t be assigning event handlers manually in React, assign onKeyPress the same way as you assign onChange and it works
React – not able to access latest props value inside setInterval
Actually trying to access props inside the setInterval but it’s not giving the latest value. Please find the below. From the parent component, I am passing time and updating time after 1 ms initially it will be null. In child component after 2 ms i am trying to access latest value from the props but its holds the older value
Update one element of State React
I have a problem, a bit hard to explain. I use Hooks to set a state, from the data I receive from my API. I display it on my frontend, no problem. I would like to update ONE value, from ONE element. Here is my full component : So, when I click on my <p>, it transforms to an input.
React controlled component unable to set on change text input
This a small functional component. A list is rendered in a input. Tried changing the key but it dint worked. I am having issues in reflecting Input text changes. Answer In such case, You need to update your list field(text) based on typed matched object by Id or other unique field. Live demo
Closing a modal on clicking outside it with React Hooks
I’m trying to create a pop up subscription box which closes whenever one clicks on the close button or clicks anywhere outside the pop up. I’ve created a modal component and a state showModal which is used to toggle the visibility of this Modal. I have tried to add setShowModal(false) to the outer div element but that just disables the
useState set call not reflecting change immediately prior to first render of app
New to React Hooks and unsure how to solve. I have the following snippet of code within my App.js file below. What I am basically trying to achieve is to get the user logged in by calling the getUser() function and once I have the user id, then check if they are an authorised user by calling the function checkUserAccess()
How can I delete an item from my todolist
I am trying to learn react js , but I don’t know how to delete an item from my list, could you help me ? Actually, I am not professional , but I am really interested in learning, there is my codes which add some new item to my list properly, but I don’t know how to delete them when
reactjs handle click outside an element error
I’m trying to create a function that will detect any click outside of an element. The error says: TypeError: Cannot read property ‘className’ of null The function works just fine when it only contains one of the conditions. Is there any problem with my code? I appreciate any kind of help. Answer There are cases in which the parent element
React: Rendered more hooks than during the previous render? React-spring
I’ve seen similar questions on SO about this error, but I haven’t been able to fix my problem below. The situation The code at this link works: https://codesandbox.io/s/frosty-water-118xp?file=/src/App.js However, what I don’t like about it is that I need to repeat myself in the ‘slides’ array, by outlining the slide structure again and again (as you can see from lines