How can I dynamically set the name of the array in state, to get it from state.  onCheckBoxItemClickList(e, value, path) {     console.log(e.target.checked)     if (e.target.checked) {         //append to array         this.setState({             [pa...
Returning the (changed) previous state within a setState that one gets from the useState hook doesn't seem to alter state. Run the following straight forward snippet    function App(){   const [state, setState] = React.useState([{x: 0}])   functi...
I have a react component in which user can upload Image and he's also shown the preview of uploaded image. He can delete the image by clicking delete button corresponding to Image. I am using react-dropzone for it. Here's the code:  class Upl...
I am attempting to track the value of two login input fields by getting their value on change and storing this value in the local state so that when the user submits the login, I can just get the current values from the state. However, this results i...
I don't understand why React not update my object. In another component through the dispatch I update the state. In this (in code below) code in mapStateToProps categories are changing (console log show one more category). But component not reren...
there! The App component is a container for three different components:   Map renders a map with visual marks on it representing addresses the user has provide. List component contains all added addresses as list items. Input allows a user to add a n...
I am developing a React + Redux web application. I am having a problem with the state management.  I have a component called EditEventComponent with the following definition.  class EditEventComponent extends React.Component{      constructor(props)...
I'm a newbie in React Native and struggling in cleaning up the state of the screen.   Like screen A has some states --> screen B, back to screen A, old states are clear. I'm using React Navigation V5  What I'm trying to do is:    After...
I  have something like:  const initialState={  hide: true  product:[          {name: ''           price: ''},           {name: ''           price: ''},           {name: ''           price: ''},...
React 16.8 brought the state and setState functionality into function based Component.  My question is: In the case of Function based component is there any way to change the state outside the function ?  Example:  import {useState} from 'react&#...

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