How can I insert into React's state array with setState?

Question

I\'m looking to modify and array in react and insert elements on specific index. This is how my state looks like:

this.state = {arr: [\'\', \'\', \'\', \'\' ]}
<         


        

Answer 1

UPDATE

Just use Object.assign() as suggested here to make a copy of your state.

Thus, you can do it as follows :

let new_state = Object.assign({}, this.state); 
let a = new_state.arr;
a[index] = "random element";
this.setState({arr: a});

Hope it helps.