How to add a new value to state in React?

Question

React

I want to use state to transfer data between two components and I want the parent component to add new values ​​\u200b\u200bin the state at the right time, thereby the child component updates the table when the data in the state changes. How is this possible to do??
Thanks

Answer 1

If you need to dynamically add a new value, then

1. create an array (for example state = {array : []})
   
2. in the parent component, push data into it
   

   const newArray = this.state.array
   newArray.push('test')
   this.setState({array : newArray})

   
   
3. There is more data in total, and there is no need to dynamically create new variables in the state, we must understand what state is there initially
   

Answer 2

https://ru.reactjs.org/docs/lifting-state-up.html