ionic-framework/core/src/components/nav-link/nav-link-utils.ts

import type { AnimationBuilder, ComponentProps } from '../../interface';
import type { NavComponent } from '../nav/nav-interface';
import type { RouterDirection } from '../router/utils/interface';

export const navLink = (
  el: HTMLElement,
  routerDirection: RouterDirection,
  component?: NavComponent,
  componentProps?: ComponentProps,
  routerAnimation?: AnimationBuilder
) => {
  const nav = el.closest('ion-nav');
  if (nav) {
    if (routerDirection === 'forward') {
      if (component !== undefined) {
        return nav.push(component, componentProps, { skipIfBusy: true, animationBuilder: routerAnimation });
      }
    } else if (routerDirection === 'root') {
      if (component !== undefined) {
        return nav.setRoot(component, componentProps, { skipIfBusy: true, animationBuilder: routerAnimation });
      }
    } else if (routerDirection === 'back') {
      return nav.pop({ skipIfBusy: true, animationBuilder: routerAnimation });
    }
  }
  return Promise.resolve(false);
};