What is the best way to implement swipe navigation in Angular 2?

Question

I'm new to Angular 2 and am looking for a way to implement a good tab touch swipe navigation for mobile users with a swipe transition to the next tab view.

So far I've found a package called angular2-useful-swiper although am not to keen on using it as I end up initializing my components early even though they are not in view.

Does anyone know a good way to implement a tab swipe based navigation for Angular 2? Any feedback will be greatly appreciated. : )

Answer 1

For the swipe detection here is a simpler solution than adding HammerJS:

In app.component.html:

<div (touchstart)="swipe($event, 'start')" (touchend)="swipe($event, 'end')">
  App content here
</div>

In app.component.ts:

private swipeCoord?: [number, number];
private swipeTime?: number;

swipe(e: TouchEvent, when: string): void {
  const coord: [number, number] = [e.changedTouches[0].clientX, e.changedTouches[0].clientY];
  const time = new Date().getTime();

  if (when === 'start') {
    this.swipeCoord = coord;
    this.swipeTime = time;
  } else if (when === 'end') {
    const direction = [coord[0] - this.swipeCoord[0], coord[1] - this.swipeCoord[1]];
    const duration = time - this.swipeTime;

    if (duration < 1000 //
      && Math.abs(direction[0]) > 30 // Long enough
      && Math.abs(direction[0]) > Math.abs(direction[1] * 3)) { // Horizontal enough
        const swipe = direction[0] < 0 ? 'next' : 'previous';
        // Do whatever you want with swipe
    }
  }
}

Note: I tried the HammerJS solution but configuring it to ignore mouse gestures was impossible because you don't have direct access to the Hammer object. So selecting some text was forcing navigation to the next page...