CODE EXAMPLE FOR JAVASCRIPT

react select and react hook form

import Select from "react-select";
import { useForm, Controller } from "react-hook-form";

const {
  control
} = useForm();

<Controller
  control={control}
  defaultValue={options.map(c => c.value)}
  name="options"
  render={({ field: { onChange, value, ref }}) => (
    <Select
      inputRef={ref}
      value={options.filter(c => value.includes(c.value))}
      onChange={val => onChange(val.map(c => c.value))}
      options={options}
      isMulti
    />
  )}
/>