流程 - 缺少类型注释

Question

流程很新，正在尝试修复我的代码以包含流程。这是我目前的代码，我添加了流类型检查，但现在出现错误，因此我需要正确注释我的代码：

// @flow
import React, { Component } from 'react';
import { Manager, Reference, Popper } from 'react-popper';

import cx from 'classnames';
import css from './Tooltip.css';
import animationsCss from './TooltipAnimations.css';

type Props = {
  theme: string,
  eventsEnabled: boolean,
}
class Tooltip extends Component<Props> {
  static defaultProps = {
    theme: 'light',
    eventsEnabled: true
  };

  firstOrderPlacement(placement) {
    if (!placement) return null;
    return placement.split('-')[0];
  }

  arrowDirectionClass(firstOrderPlacement) {
    switch (firstOrderPlacement) {
      case 'right':
        return css.arrowLeft;
      case 'left':
        return css.arrowRight;
      case 'top':
        return css.arrowDown;
      case 'bottom':
        return css.arrowUp;
      default:
        return css.arrowUp;
    }
  }

  render() {
    const { placement, className, children, fadeIn, theme, eventsEnabled } = this.props;

    return (
      <Popper placement={placement} eventsEnabled={eventsEnabled}>
        {({ ref, style, placement }) => {
          const firstOrderPlacement = this.firstOrderPlacement(placement);
          const arrowDirectionClass = this.arrowDirectionClass(firstOrderPlacement);
          const subContainerStyle = {
            display: 'flex',
            flexDirection:
              firstOrderPlacement === 'top' || firstOrderPlacement === 'bottom' ? 'column' : 'row',
          };
          const childrenContainerClassName = cx(
            css.childrenContainer,
            css.wrapper,
            theme === "dark" ? css.dark : css.light
          );
          const content = <div className={childrenContainerClassName}>{children}</div>;
          const subContainerClassName = fadeIn ? cx(animationsCss.fadeIn, className) : className;

          return (
            <div
              ref={ref}
              className={cx(css.container, css.mobileTooltip)}
              style={style}
              data-placement={placement}
            >
              <div className={subContainerClassName} style={subContainerStyle}>
                {(firstOrderPlacement === 'left' || firstOrderPlacement === 'top') && content}
                <div>
                  <div className={cx(css.arrow, arrowDirectionClass)} />
                </div>
                {(firstOrderPlacement === 'right' || firstOrderPlacement === 'bottom') && content}
              </div>
            </div>
          );
        }}
      </Popper>
    );
  }
}

export { Manager as TooltipManager, Reference as TooltipReference, Tooltip };

我认为我需要将这些添加到我的道具中。这些正确吗？

  placement: string,
  className?: string,
  children?: any,
  fadeIn: any,

我缺少这两个的类型注释，我不确定如何继续：

  firstOrderPlacement(placement) {..}

  arrowDirectionClass(firstOrderPlacement) {..}

有什么帮助吗？

Answer 1

Are these correct?

试试看就知道了！

不过请记住，使用 any 是一种快捷方式，基本上只是关闭输入。对于 children 你期望反应元素的地方，你通常应该只使用 React.node。如果您基本上想要任意嵌套的 DOM-like 内容，如反应元素、元素数组、文本字符串等，这将起作用。fadeIn 看起来像是可能一个字符串, 但如果不看它的来源就很难分辨。

I'm missing type annotation for these two which I'm not sure how to proceed:

Flow 希望您键入函数的参数。类似于：

firstOrderPlacement(placement: string) {

或其他什么。

Answer 2

注释Props喜欢：

type Props = {
  ...
  placement: string,
  className?: string,
  children?: any,
  fadeIn: any,
  ...
}

Placement 参数是 string firstOrderPlacement(placement) {..} 和 return 函数的值是 null 或 string,所以你可以使用 maybe type 进行注释：

firstOrderPlacement(placement: string): ?string => {...}

或联合类型，因为 maybe type 涵盖 undefined。

type FirstOrder = string | null;

firstOrderPlacement函数的结果是arrowDirectionClass的参数。所以参数类型：

arrowDirectionClass(firstOrderPlacement: ?string): string => {...}

或：

arrowDirectionClass(firstOrderPlacement: FirstOrder): string => {...}

流程 - 缺少类型注释

Flow - missing type annotation

reactjs

flowtype