redux-devtools/packages/redux-devtools-ui/src/Button/Button.tsx

import React, { Component, ReactNode } from 'react';
import type { Base16Theme } from 'react-base16-styling';
import createStyledComponent from '../utils/createStyledComponent';
import * as styles from './styles';
import { commonStyle, tooltipStyle } from './styles/common';

const ButtonWrapper = createStyledComponent(styles, 'button');
const TooltipWrapper = createStyledComponent(tooltipStyle);
const CommonWrapper = createStyledComponent(commonStyle);

export type TooltipPosition =
  | 'top'
  | 'bottom'
  | 'left'
  | 'right'
  | 'bottom-left'
  | 'bottom-right'
  | 'top-left'
  | 'top-right';

export type Size = 'big' | 'normal' | 'small';

export type Mark =
  | 'base08'
  | 'base09'
  | 'base0A'
  | 'base0B'
  | 'base0C'
  | 'base0D'
  | 'base0E'
  | 'base0F';

export interface ButtonProps {
  children: ReactNode;
  title?: string;
  tooltipPosition: TooltipPosition;
  onClick?: React.MouseEventHandler<HTMLButtonElement>;
  type?: 'button' | 'reset' | 'submit';
  disabled?: boolean;
  primary?: boolean;
  size?: Size;
  mark?: Mark | false;
  theme?: Base16Theme;
}

export default class Button extends Component<ButtonProps> {
  shouldComponentUpdate(nextProps: ButtonProps) {
    return (
      nextProps.children !== this.props.children ||
      nextProps.disabled !== this.props.disabled ||
      nextProps.mark !== this.props.mark ||
      nextProps.size !== this.props.size ||
      nextProps.primary !== this.props.primary ||
      nextProps.tooltipPosition !== this.props.tooltipPosition ||
      nextProps.title !== this.props.title
    );
  }

  onMouseUp: React.MouseEventHandler<HTMLButtonElement> = (e) => {
    e.currentTarget.blur();
  };

  render() {
    const button = (
      <ButtonWrapper
        theme={this.props.theme}
        aria-label={this.props.title}
        primary={this.props.primary}
        disabled={this.props.disabled}
        onMouseUp={this.onMouseUp}
        onClick={this.props.onClick}
        type={this.props.type}
      >
        {this.props.children}
      </ButtonWrapper>
    );

    const Wrapper = this.props.title ? TooltipWrapper : CommonWrapper;
    return (
      <Wrapper
        theme={this.props.theme}
        tooltipTitle={this.props.title}
        tooltipPosition={this.props.tooltipPosition}
        size={this.props.size}
        mark={this.props.mark}
      >
        {button}
      </Wrapper>
    );
  }

  static defaultProps = {
    tooltipPosition: 'top',
  };
}