ios – Can we customise iPhone Safari’s scroll-to-top habits for an online web page?

Customizing Scroll-to-High Habits for an iframe on iPhone Safari

To customise the scroll-to-top habits for an online web page that makes use of an iframe as the primary content material on iPhone Safari, you’ll be able to pay attention for the primary window’s scroll occasion and set off the scroll-to-top motion on the iframe when the primary window scrolls to the highest. This is how one can obtain this:

How:

1. Add a Scroll Occasion Listener to the Window:

   Connect an occasion listener to the primary window that listens for the 'scroll' occasion.

2. Test if the Window is Scrolled to the High:

   Contained in the occasion handler, examine if the window’s scroll place is on the high utilizing window.scrollY === 0.

3. Scroll the iframe Content material to the High:

   If the window is on the high, use iframe.contentWindow.scrollTo(0, 0) to scroll the iframe’s content material to the highest.

4. Take into account Safety Restrictions:

   Make sure that the iframe’s content material is from the identical origin as the primary web page to keep away from cross-origin safety restrictions.

Instance Code:

Have in mind:

• Heuristic for Standing Bar Faucet:

  To distinguish between a standing bar faucet and guide scrolling to the highest, you would possibly contemplate including a small delay or utilizing further heuristics.

• Cross-Origin Iframes:

  If the iframe content material is from a special area, accessing iframe.contentWindow might be restricted because of the same-origin coverage. In such circumstances, you would possibly want to make use of various approaches, corresponding to posting messages between the primary web page and the iframe.

• Different Method:

  You’ll be able to add a customized scroll-to-top button contained in the iframe for customers to scroll to the highest immediately, offering a constant expertise throughout gadgets.

By implementing this resolution, you’ll be able to customise the scroll-to-top habits in your net web page’s iframe content material on iPhone Safari, enhancing the person expertise.