Or how about this?!
We leap to an irrelevant section when is disabled?
And here’s the first video of screen spinning with anchoring handicapped, in contrast to the view with scroll anchoring.
We have found that our implementation of this specification can pick inadequate anchors on pages with table layouts or significant content within of overflow: hidden.
You have been studying headlines, but an advertisement loads and moves everything you were reading off the display.

However, what happens when an ad loads on a webpage over where you’re currently reading?

The scroll anchoring feature in Firefox has been developed by a lot of people. Thanks go out to Daniel Holbert, David Baron, Emilio Cobos Álvarez, and Hiroyuki Ikezoe for their advice and many reviews.

New features are excellent, but do they violate websites for consumers?

By monitoring the distance you are from the top of the 14, browsers scroll. Your distance increases or decreases from the top, as you scroll around.
Additionally, a new CSS property was introduced, overflow-anchor, to allow websites to opt-out of scroll anchoring.

You are kept by the browser at the same distance from the top of the page, but currently there’s more content between what you ’ re the very best along with reading. In effect, this moves the observable part of the page away from everything you’re reading (and oftentimes into the ad which ’s only loaded).
Or, what if your telephone rotates ?
This sort of workaround comes with some risk, as present websites have expectations regarding how scrolling functions.
Of course there are possible incompatibilities with existing websites. If you see a brand new issue caused by scroll anchoring, please file a bug!
Have you ever had this experience before?

To go for an anchor node, scroll anchoring employs the anchor choice algorithm. Near the top of the page and the algorithm attempts to select. The exact steps are slightly complicated, but about it works by iterating over the elements in the DOM and choosing the first one that is visible on the screen.

To fixing these issues, the key insight is that users don’t care what distance. They care about their position relative to the material they’re looking at!

Following is a webpage with a slider that changes the elevation of a component near the top of the page. Scroll anchoring prevents the element over the viewport.

Web compatibility

  1. If the anchor is too large, it is likely that content inside of it will enlarge or shrink in a manner we won’t adjust for.
  2. When the anchor is too far in the top of the screen, it’s possible that content under what you’re considering will enlarge and cause undesirable scroll adjustments.

How it works

Future perform

Scroll anchoring is the most effective when it chooses an anchor that’s small and near the top of your display.

The end result is that changes to the layout of a page over the anchor node aren’t able to modify the relative position of the anchor node on the screen.

Let’s take a look at a few examples of anchoring in actions.
There’s a frequent cause for both of these issues.
Scroll anchoring mitigates the danger with various heuristics to disable the feature in situations which have caused problems with existing websites.

It’s similar to how browsers functioned to prevent popup-ads in earlier times and the continuing work to stop autoplaying audio and video.

Scroll anchoring works to anchor the consumer to the material that they’re looking at. The page scrolls to keep you as ads, display rotations, display resizes, or other causes move this content.
You can now ’ t find the paragraph that you just read, although your phone rotates.
The edition of scroll anchoring shipping now in Firefox 66 is the initial implementation. In the months ahead we will continue to improve it.

Scroll anchoring functions by first selecting a component of the DOM to function as anchor node and then trying to keep that node at exactly the same relative place on the screen.
It breaks behaviour of the internet to fix an annoyance for consumers.
Following is a webpage with CSS animations and transforms to change the height of elements on the page. Anchoring keeps you looking even though it’s been moved by animations.
This is due to a fuzzy subject of the specification where we picked a strategy different than Chrome’therefore execution. This is one of the values of numerous browser implementations: We’ve gained expertise with scroll anchoring and hope to bring that to the specification, so it is not defined by one browser’s implementation information.

To use it, simply add overflow-anchor: no one on any scrolling element where you don’t want to utilize scroll anchoring. Additionally, you may add overflow-anchor: none to certain elements you want to exclude from being chosen as anchor nodes.

The most critical effort will entail improving the algorithm used to pick an anchor.


Every time a new element is inserted into the webpage, or the display is rotated/resized, the webpage layout has to be recalculated. During this process, we check to find out whether the anchor node has been transferred to a new location. If this is so , we scroll to maintain the page in the same relative position to the anchor node.

It’s predicated on a brand new CSS specification that was first implemented by Chrome, and is presently available in Firefox.