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TypeScriptでstyled-componentsを使う時propsでstyleの制御ができなくて困った時の解決法

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概要

TypeScriptでstyled-componentsを使いたくて公式ドキュメントのコードを写経していたら、
"Adapting based on props"の節の以下のコードが通らなくて困った。

const Button = styled.button`
  /* Adapt the colors based on primary prop */
  background: ${props => props.primary ? "palevioletred" : "white"};
  color: ${props => props.primary ? "white" : "palevioletred"};

  font-size: 1em;
  margin: 1em;
  padding: 0.25em 1em;
  border: 2px solid palevioletred;
  border-radius: 3px;
`;

原因

原因はpropsの部分に以下のエラーが出ていた。

> any
> プロパティ 'primary' は型 'ThemedStyledProps<Pick<DetailedHTMLProps<ButtonHTMLAttributes<HTMLButtonElement>, HTMLButtonElement>,
 "form" | ... 264 more ... | "value"> & { ...; }, any>' に存在しません。ts(2339)

解決法

interfaceを以下の様に定義してあげるとコンパイルが通った。

import styled, { StyledComponent } from 'styled-components';

interface ButtonProps {
  primary: boolean;
}

export const Button = styled.button<ButtonProps>`
  /* Adapt the colors based on primary prop */
  background: ${({primary}) => (primary ? 'palevioletred' : 'white')};
  color: ${({primary}) => (primary ? 'white' : 'palevioletred')};

  font-size: 1em;
  margin: 1em;
  padding: 0.25em 1em;
  border: 2px solid palevioletred;
  border-radius: 3px;
`;

ちなみにこのButtonコンポーネントを使う側のコードは以下の様になる。

import React from 'react';
import Button from '../../atoms/Button';

export const App: React.FC = () => {
  return (
    <>
      <Button primary={false}> Button </Button>
    </>
  );
};

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