I have a let: valorImput, coming from an e.target.value from input. I use this value to compare it with a value in an array and it works. But when I want to get its value it said undefined and I'm not able to use it in future functions. This is a link to Codesand with the whole code.

let valorImput = ""; 
dropDown.onchange = (e) => {
          valorImput = e.target.value;
          console.log("dropdown onchange console", e.target.value);
};
    
btn.onclick = (e) => {
      const existe = productos.find((x) => x.titulo === valorImput);
      existe ? (precio = existe.precio) : console.log("NO hay Nada");
      document.getElementById("valorDeSelect").value = precio;
       Swal.fire("El precio esta expresado en Dolares!", "USD " + precio, "success");
console.log("valor input", valorImput);
};