cal.pub0.org/packages/ui/v2/form/Select.tsx

import ReactSelect, { components, GroupBase, InputProps, Props } from "react-select";

import classNames from "@calcom/lib/classNames";

export type SelectProps<
  Option,
  IsMulti extends boolean = false,
  Group extends GroupBase<Option> = GroupBase<Option>
> = Props<Option, IsMulti, Group>;

export const InputComponent = <Option, IsMulti extends boolean, Group extends GroupBase<Option>>({
  inputClassName,
  ...props
}: InputProps<Option, IsMulti, Group>) => {
  return (
    <components.Input
      // disables our default form focus hightlight on the react-select input element
      inputClassName={classNames("focus:ring-0 focus:ring-offset-0", inputClassName)}
      {...props}
    />
  );
};

function Select<
  Option,
  IsMulti extends boolean = false,
  Group extends GroupBase<Option> = GroupBase<Option>
>({ className, ...props }: SelectProps<Option, IsMulti, Group>) {
  return (
    <ReactSelect
      theme={(theme) => ({
        ...theme,
        borderRadius: 6,
        colors: {
          ...theme.colors,
          primary: "var(--brand-color)",

          primary50: "rgba(209 , 213, 219, var(--tw-bg-opacity))",
          primary25: "rgba(244, 245, 246, var(--tw-bg-opacity))",
        },
      })}
      styles={{
        option: (provided, state) => ({
          ...provided,
          color: state.isSelected ? "var(--brand-text-color)" : "black",
          ":active": {
            backgroundColor: state.isSelected ? "" : "var(--brand-color)",
            color: "var(--brand-text-color)",
          },
        }),
      }}
      components={{
        ...components,
        IndicatorSeparator: () => null,
        Input: InputComponent,
      }}
      className={className}
      {...props}
    />
  );
}

export default Select;