Changing all object values to true with React useState

In a certain file, I have defined an object with the following structure:

export const items = {
  first: false,
  second: false,
  third: false
}

Within a component, I am using this object as shown below:

import { items } from 'file';
const [elements, setElements] = useState(items);

When a button is clicked, a method is called to update all values in elements to true.

Although the statement below successfully changes the values, it does not trigger a re-render of the component (which is necessary):

Object.keys(elements).forEach(element => elements[element] = true);

What is the correct way to use setElements to update all values in elements?

Answer №1

The issue you are encountering arises from modifying the state object directly, causing prevState === nextState to be true and preventing React from re-rendering. One approach is to create a new object and transfer the properties like so, using a combination of Object.keys and forEach, but with an additional step:

setState(prevState => {
  const nextState = {}
  Object.keys(prevState).forEach(key => {
    nextState[key] = true
  })
  return nextState
})

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