Access selected value from react's Select Component - reactjs

Question

Hello dear community,
I want to create a very basic website for my school assignment.
I have a dropdown menu with a Select Component as its implementation. I need to access the selected value, which is a currency in my case, in order to update the information displayed on the page once a currency has been selected.
I am kind of frustrated since I wasn't able to find a helpfull solution to my relatively basic problem (I think it's basic :D)
My component class here:
import { Component } from "react";
import Select from 'react-select';
interface DropdownMenuProps {
values: [{}]
defaultValue: string
}
interface DropdownMenuState { }
/**
* Represents a Dropdown Menu
*/
export default class DropdownMenu extends Component<DropdownMenuProps, DropdownMenuState> {
render() {
return (
<div style={{ width: '120px' }}>
<Select id="dropdown-menu"
placeholder={this.props.defaultValue}
options={this.props.values}
// getOptionValue={(option) => option.value}
// getOptionLabel={(option) => option.label}
/>
</div>
)
}
}
This is how I create a dropdown menu compent:
<DropdownMenu defaultValue="Currency" values={[{ label: "EUR", value: "EUR" }, { label: "GBP", value: "GBP" }, { label: "USD", value: "USD" }]} ></DropdownMenu>
I'm glad for any tips :)

Answer 1

You have to use the onChange prop of react-select:
<select
id="dropdown-menu"
onChange={handleSelectChange}
>
and in this function you could handle the changes:
const handleSelectChange = (selectedVal) => console.log(selectedVal)

Answer 2

I recommend you using directly onChange and save it into a state:
1st:
Create state with the name you want:
const [selectValue, setSelectValue] = useState({});
2nd: Create options:
const options = [
{ label: "Tomate", value: 1 },
{ label: "Queso", value: 2 }
];
3rd: add method onChange in select and pass options:
const onChange = (ev) => {
setSelectValue(ev);
//console.log(ev);
console.log(selectValue);
};
<Select
id="dropdown-menu"
placeholder={"e"}
options={options}
onChange={onChange}
/>
I have created demo here:
https://codesandbox.io/s/ancient-pond-96h53?file=/src/App.js