How to correctly update <select multiple ...> in React?

In a react app, you should control a <select>. It's real easy with a single select:

const ExampleSelect = () => {
  const [value, setValue] = React.useState()
  return (
    <select
      value={value}
      onChange={(e) => setValue(e.currentTarget.value)}
    >
      <option value='foo'>Foo</option>
      <option value='bar'>Bar</option>
      <option value='baz'>Baz</option>
    </select>
  )
}

But when you add the multiple prop to a <select> things get weird. Functions passed to onChange that iterate through the options and take actions based on which ones have option.selected === true only seem to work on desktop -- in Safari on iOS, a select with multiple === true seems impossible to control.

I feel like this is a really basic question, but I can't find anything on it. I'm not looking to install a whole library that comes with pre-styled components just to be able to select multiple options in a <select> inside a react app.

Here are a few onChange functions I've tried:

type Setter = React.Dispatch<React.SetStateAction<string[] | undefined>>
type SelectChange = React.ChangeEvent<HTMLSelectElement>

export const handleMultiSelectChange = <S extends Function = Setter>(
  value: string[] | undefined, setter: S
) => (
    e: SelectChange
  ): void => {
    const v = e.currentTarget.value
    if (value && value.length > 0) {
      const index = value.indexOf(v)
      if (index >= 0) {
        const newValue = value.filter((opt) => opt !== v)
        setter(newValue)
      } else {
        setter([...value, v])
      }
    } else {
      setter([v])
    }
  }

type Setter = React.Dispatch<React.SetStateAction<string[] | undefined>>
type SelectChange = React.ChangeEvent<HTMLSelectElement>

export const handleChangeMultiple = <S extends Function = Setter>(
  value: string[] | undefined = [], setter: S
) => (
    event: SelectChange
  ): void => {
    const {options} = event.currentTarget
    for (let i = 0, l = options.length; i < l; i += 1) {
      const option = options[i]
      if (option.selected) {
        alert(value.includes(option.value))
        if (value.includes(option.value)) {
          const index = value.indexOf(option.value)
          value.splice(index, 1)
        } else {
          value.push(option.value)
        }
      }
    }
    setter(value)
  }

(those ones are used like this:)

const ExampleSelect = () => {
  const [value, setValue] = React.useState()
  return (
    <select
      multiple
      value={value}
      onChange={handleChangeMultiple(value, setValue)}
    >
      <option value='foo'>Foo</option>
      <option value='bar'>Bar</option>
      <option value='baz'>Baz</option>
    </select>
  )
}

(though that's not working correctly for me)

For select, e.target gives you options array and you can loop thru it getselected option. Use map to grab the actual values and store them in your state.

select

   <select
        onChange={handleChangeNormalSelect}
        multiple
        value={val}
        options={options}
      >
        {options.map(item => {
          return <option value={item.value}>{item.label}</option>;
        })}
      </select>

onChange

...
const [val, setVal] = useState([]);
...
const handleChangeNormalSelect = e => {
    const updatedOptions = [...e.target.options]
      .filter(option => option.selected)
      .map(x => x.value);
    console.log("updatedOptions", updatedOptions);
    setVal(updatedOptions);
  };
...

Working code sample(html multi select) is here