Set value in Select (Input) of reactstrap

Question

Code:

const [frequency, setFrequency] = useState({});

function handleSelect(event) {
    const target = event.target;
    const value = target.value;
    const name = target.name;
    setFrequency({
        ...frequency,
        [name]: value
    })
} 

<FormGroup>
    <Label for="exampleSelect">Select</Label>
    <Input type="select" name="select" id="exampleSelect" onChange= {handleSelect} >
    // I tried the below, But it does not seem to work
    <Input type="select" name="frequency" id="frequency" value={frequency.frequency}>
      <option>1</option>
      <option>2</option>
      <option>3</option>
      <option>4</option>
      <option>5</option>
    </Input>
  </FormGroup>

Dropdown:

Selected value:

When I select the value it renders in the input but when I want to set the selected value.

Meaning, I want to set the value such that when I load it should start from a selected value not from 1.

So how can I set the value?

I can setState by calling some select function. But in input tag I just want a value any value so when I refresh dropdown should show xyx...1,2,3,4.

Answer 1

If you write value="xyx", the value of select will always be xyz no matter what option you select.

So, instead of that you can provide value from react state and a handleChange function to change the value on select.

If you want to select the "first option" i.e. xyz at start, you can initialize the state with xyz:

export default function App() {
  const [frequency, setFrequency] = useState({ frequency: "xyz" });

  function handleSelect(e) {
    setFrequency((prev) => ({
      ...prev,
      [e.target.name]: e.target.value,
    }))
  }

  return (
    <>
      {JSON.stringify(frequency)}
      <FormGroup>
        <Label for="exampleSelect">Select</Label>
        <Input
          type="select"
          name="frequency"
          id="frequency"
          value={frequency.frequency}
          onChange={handleSelect}
        >
          <option>xyz</option>
          <option>1</option>
          <option>2</option>
          <option>3</option>
          <option>4</option>
          <option>5</option>
        </Input>
      </FormGroup>
    </>
  );
}

Here is a demo