I am attempting to send form data from my react client to my nodejs server; however, upon submitting the form, only the last property of the state is sent to my server. I know this is a client side issue, since with Postman, my entire form data is sent to my database. It seems when I add a value to
Tag: react-hooks
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…
Why can’t `useCallback` always return the same ref
I don’t understand why useCallback always returns a new ref each time one of the deps is updated. It results in many re-render that React.memo() could have avoided. What is, if any, the problem with this implementation of useCallback? Using this instead of the built-in implementation sure has a signific…
Can’t set state in js react-native
Getting error while trying to setState in React Native. Code Error TypeError: undefined is not an object (evaluating ‘_this.setState’) Answer useState Hook Functional components don’t have access to setState method but useState hook. useState hook works by defining the name of value, e.g. fo…
Using external script (in JavaScript) in Gatsby JS
I am trying to load a JavaScript code on my gatsby app. Inside my static folder on my root folder I created a code called script.js. Here’s the snippet inside: Then on my Layout component, I tried to use helmet to include this: But this returns this error: I am not sure if I should place my script insid…
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…
Passing a component to the useState() hook
I’m trying to make a system where my App component’s state stores another component, which it will render. Any component should be able to update this state, forcing the App component to re-render. I know how to make the state accessible by any component, but I’m having some issues with rend…
How to update cart quantity if item already exist in Cart – reactjs?
in this code, instead of showing “The product has been added to cart.” alert message, I want to update cart quantity if item already exist in cart, please help me out. Answer I am making some assumptions here as to what your variables look like, but generally, here is what you need:
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 functional component with mapped Child functional component with onClick function
Hi I have mapped some json data named “projectsData” and I am trying to “bind” an onClick event with a setState hook. The mapping works except for the “onClick” does not work when clicking the grid item. In my case I want to update filterproject value with the project.id va…