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overflow-anchor

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The overflow-anchor CSS property provides a way to opt out of the browser's scroll anchoring behavior, which adjusts scroll position to minimize content shifts.

Scroll anchoring behavior is enabled by default in any browser that supports it. Therefore, changing the value of this property is typically only required if you are experiencing problems with scroll anchoring in a document or part of a document and need to turn the behavior off.

Try it

overflow-anchor: auto;

overflow-anchor: none;

<section class="default-example" id="default-example">
  <div class="whole-content-wrapper">
    <button id="playback" type="button">Start lottery</button>
    <p>Magic numbers for today are:</p>
    <div id="example-element"></div>
  </div>
</section>

.whole-content-wrapper {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
}

#example-element {
  height: 100%;
  border: 2px dashed dodgerblue;
  padding: 0.75em;
  text-align: left;
  overflow: scroll;
}

#playback {
  font-size: 1em;
  width: 10em;
  height: 4em;
  font-weight: bold;
  margin: 1em auto;
  background-color: aliceblue;
  border: solid 2px dodgerblue;
  border-radius: 5px;
}

#playback:hover {
  border-color: lightseagreen;
}

#playback:active {
  filter: brightness(0.9);
}

const example = document.getElementById("example-element");
const button = document.getElementById("playback");
let intervalId;

function setInitialState() {
  example.innerHTML = "";
  Array.from({ length: 10 }, (_, i) => i).forEach(addContent);
  example.scrollTop = example.scrollHeight;
}

function addContent() {
  console.log("adding content");
  const magicNumber = Math.floor(Math.random() * 10000);
  example.insertAdjacentHTML(
    "afterbegin",
    `<div class="new-content-container">New Magic Number: ${magicNumber}</div>`,
  );
}

button.addEventListener("click", () => {
  if (example.classList.contains("running")) {
    example.classList.remove("running");
    button.textContent = "Start lottery";
    clearInterval(intervalId);
  } else {
    example.classList.add("running");
    button.textContent = "Stop lottery";
    setInitialState();
    intervalId = setInterval(addContent, 1000);
  }
});

Syntax

/* Keyword values */
overflow-anchor: auto;
overflow-anchor: none;

/* Global values */
overflow-anchor: inherit;
overflow-anchor: initial;
overflow-anchor: revert;
overflow-anchor: revert-layer;
overflow-anchor: unset;

Values

auto: The element becomes a potential anchor when adjusting scroll position.
none: The element won't be selected as a potential anchor.

Formal definition

Initial value	`auto`
Applies to	all elements
Inherited	no
Computed value	as specified
Animation type	discrete

Formal syntax

overflow-anchor = 
  auto  |
  none

Examples

Prevent scroll anchoring

To prevent scroll anchoring in a document, use the overflow-anchor property.

* {
  overflow-anchor: none;
}

Specifications

Specification
CSS Scroll Anchoring Module Level 1> # exclusion-api>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`overflow-anchor`	56	79	66	43	preview	56	66	43	No	6.0	56	No
`auto`	56	79	66	43	No	56	66	43	No	6.0	56	No
`none`	56	79	66	43	No	56	66	43	No	6.0	56	No