Why can't I push values in my state array in react.js?

Question

I can add 1 item to the array it logs [\"50\"] in the console. But when I try to add a second value I get this error \"currentScores.push is not a f

Answer 1

Push returns the new length property of the object upon which the method was called.

You set the state of scores to the new length each time.

addScore() {
        console.log(this.state.scores);
        this.setState(state=> ({
            scores: [...state.scores, state.scoreInput]
            })
         );
      }