8 июл. 2019 г. · Here is an example on how to dynamically add new key-value pairs to the object in your state.

1 авг. 2019 г. · You can use a javascript object as your value. This way you can put more variables in your object and in one place.

11 июл. 2017 г. · Since id is a variable that is having the state key value, so you need to use [] , what it will happen is, the id will get replaced by it's value.

26 сент. 2020 г. · To update the current state, pass a function to the setter setProductQuantity(state => ({ ...state, [ id ]: e.target.value })) This updates the existing state ...

8 окт. 2021 г. · To add to the current state a new key value pair: onClick={() => { setChoice( currentState => { return {...currentState, Key:Val} } }}

11 апр. 2019 г. · 3 Answers 3 · I am using arrow functions to define your class methods, but if you chose to not do so, don't forget to bind it in the constructor ...

23 мар. 2021 г. · I fixed my issue by first creating a new object with the current state and than deleting the key-value pair of the deleted field in the ...

26 февр. 2021 г. · I have a state const [options, setOptions] = useState({}); I want to append a key/value to object while also preserving the key/value that I have push before.

26 июн. 2020 г. · I'm trying to add a key-value pair to an object using useState inside map function. However, the spread operation in setContainer({...container, [data.pk]: data. ...

16 апр. 2020 г. · I am trying to update a key/value pair of a nested object in the state while the user types in the form.