Here is the parent code: Here is the child code: The expected result is that: When the user picks a month from the MonthPicker, the parent component submit the select month and year to server. Get the result from the server and then send the result to the child component. The actual result is that the child c…
Tag: use-state
FlatList scrollToIndex out of range
I have a FlatList where I’m trying to scroll through each index of my data array every X amount of seconds. There’s only two items in my array right now but there could be more. The current code works for the first two iterations but then it does not seem to reset properly and I get the scrollToIn…
Updating useState without inserting another object
This is the full code of the component, I am so tired that I can’t think much on how to solve this problem These are results of localStorage value, the problem is instead of changing the value of inCart of the specific object, it’s creating a new object with property “inCart”. Any sugg…
Sibling component not re-rerendering on state change (using useEffect, useState and Context)
In my Main.js I create a first global state with a username and a list of users I’m following. Then, both the Wall component and FollowingSidebar render the list of follows and their messages (plus the messages of the main user). So far so good. But in a nested component inside FollowingSidebar called F…
React UseState truthy/falsy
I’m trying to initialize some state for my form component with data from the redux store. If the shippingAddress object is null, I want to set properties of formData object to empty strings. Not sure how to get it to work. Currently I am receiving an error message saying TypeError: Cannot read property …
Usestate increment by 1 not working in setInterval
For some reason this will never go past two when I run the setCurrentPage but if I increment it like this It works as expected. I am guessing it has something to do with the useEffect or the setInterval but not really a 100% sure why. Answer A new handleScroll function is created on every render in your code.…
State from react useState is updated when key property is used but requires useEffect or similar method to update otherwise
I have the following component: It is rendered via the following component: It renders the following list: As you can see props.text and useState item from props.text are rendered equally. If props.text is updated it does not reflect on useState though. https://stackoverflow.com/a/53846698/3850405 I can solve…
React – useState property not updating
I’m having trouble with react useState hook. I’m trying to clean the state on a dialog close. But theres’s always one property that does not gets updated. Buttons: —- Edit —- That button opens a dialog box which has a textfield: This is how the dialog box open and closes: This is…
Do I need to use useEffect to rerender a component?
I had an issue getting a component to update when it´s props changed. I got it to work using useEffect, but am unsure if it is the correct way to solve my problem. This is my code: I was thinking when I updated the props of InputWithDefaultValue it would get rerendered. Is using useEffect to get the component…
How can I store and update multiple values in React useState?
I’ve a series of user data elements which I’m collecting inside a React component using hooks. Each of these are updated as follows. Is there a more succint way to do this using an object as the variable? Answer You should add name attributes to input tags. Each name must refer to key in AllValues…