Function isOptionSelected

packages/react-select/src/Select.tsx:583–598

(
  props: Props<Option, IsMulti, Group>,
  option: Option,
  selectValue: Options<Option>
)

    : false;
}
function isOptionSelected<
  Option,
  IsMulti extends boolean,
  Group extends GroupBase<Option>
>(
  props: Props<Option, IsMulti, Group>,
  option: Option,
  selectValue: Options<Option>
): boolean {
  if (selectValue.indexOf(option) > -1) return true;
  if (typeof props.isOptionSelected === 'function') {
    return props.isOptionSelected(option, selectValue);
  }
  const candidate = getOptionValue(props, option);
  return selectValue.some((i) => getOptionValue(props, i) === candidate);
}
function filterOption<
  Option,
  IsMulti extends boolean,