"TS7017: Element implicitly has an 'any' type ... has no index signature" 当我使用 react-transition-group

Question

这是我的代码：

 renderSoundWave = () => {
    const defaultStyle = {
      opacity: 1,
      transition: `opacity ${DURATION}ms ease-in-out`,
    }

    const transitionStyles = {
      entering: { opacity: 1 },
      entered:  { opacity: 0 },
    };
    return (

    <Transition timeout={DURATION} in={this.animate}>
      {(state) => (
        <div className={styles.soundWaves}
             style={{ ...defaultStyle, ...transitionStyles[state]}}> {/* Error here! */
          <SoundWaves/>
        </div>
        )}
    </Transition>
      );
  }

我想在 react-transition-group 中使用 Transition 为图标 SoundWave 设置动画。

但是我收到这个错误：

error TS7017: Element implicitly has an 'any' type because type '{ entering: { opacity: number; }; entered: { opacity: number; }; }' has no index signature.

错误指向

上面的 ...transitionStyles[state]

我不明白为什么会抛出这个错误。是什么导致了这种类型错误？

Answer 1

我最终通过将 transitionStyles 更改为

来修复它

const transitionStyles: { [id: string]: React.CSSProperties } = {
  entering: { opacity: 1 },
  entered:  { opacity: 0 },
};