ionic-framework/packages/react/src/components/navigation/IonTabButton.tsx

import type { JSX as LocalJSX } from '@ionic/core/components';
import React from 'react';

import type { RouterOptions } from '../../models';
import type { IonicReactProps } from '../IonicReactProps';
import { IonTabButtonInner } from '../inner-proxies';

type Props = LocalJSX.IonTabButton &
  IonicReactProps & {
    routerOptions?: RouterOptions;
    ref?: React.Ref<HTMLIonTabButtonElement>;
    onClick?: (e: CustomEvent) => void;
    onPointerDown?: React.PointerEventHandler<HTMLIonTabButtonElement>;
    onTouchEnd?: React.TouchEventHandler<HTMLIonTabButtonElement>;
    onTouchMove?: React.TouchEventHandler<HTMLIonTabButtonElement>;
    children?: React.ReactNode;
  };

export class IonTabButton extends React.Component<Props> {
  shouldComponentUpdate(): boolean {
    return true;
  }

  constructor(props: Props) {
    super(props);
    this.handleIonTabButtonClick = this.handleIonTabButtonClick.bind(this);
  }

  handleIonTabButtonClick() {
    if (this.props.onClick) {
      this.props.onClick(
        new CustomEvent('ionTabButtonClick', {
          detail: {
            tab: this.props.tab,
            href: this.props.href,
            routeOptions: this.props.routerOptions,
          },
        })
      );
    }
  }

  render() {
    /**
     * onClick is excluded from the props, since it has a custom
     * implementation within IonTabBar.tsx. Calling onClick within this
     * component would result in duplicate handler calls.
     */
    // eslint-disable-next-line @typescript-eslint/no-unused-vars
    const { onClick, ...rest } = this.props;
    return <IonTabButtonInner onIonTabButtonClick={this.handleIonTabButtonClick} {...rest}></IonTabButtonInner>;
  }

  static get displayName() {
    return 'IonTabButton';
  }
}