The scroll-behavior CSS property sets the behavior for a scrolling box when scrolling is triggered by the navigation or CSSOM scrolling APIs.

/* Keyword values */ scroll-behavior: auto; scroll-behavior: smooth;  /* Global values */ scroll-behavior: inherit; scroll-behavior: initial; scroll-behavior: revert; scroll-behavior: unset; 

scroll-behavior

The scroll-behavior CSS property sets the behavior for a scrolling box when scrolling is triggered by the navigation or CSSOM scrolling APIs.

Note that any other scrolls, such as those performed by the user, are not affected by this property. When this property is specified on the root element, it applies to the viewport instead. This property specified on the body element will not propagate to the viewport.

User agents are allowed to ignore this property.

Syntax

/* Keyword values */ scroll-behavior: auto; scroll-behavior: smooth;  /* Global values */ scroll-behavior: inherit; scroll-behavior: initial; scroll-behavior: revert; scroll-behavior: unset; 

The scroll-behavior property is specified as one of the keyword values listed below.

Values

auto

The scrolling box scrolls instantly.

smooth

The scrolling box scrolls in a smooth fashion using a user-agent-defined timing function over a user-agent-defined period of time. User agents should follow platform conventions, if any.

Formal definition

Initial value	auto
Applies to	scrolling boxes
Inherited	no
Computed value	as specified
Animation type	discrete

Formal syntax

auto | smooth

Examples

Setting smooth scroll behavior

HTML

<nav>   <a href="#page-1">1</a>   <a href="#page-2">2</a>   <a href="#page-3">3</a> </nav> <div class="scroll-container">   <div class="scroll-page" id="page-1">1</div>   <div class="scroll-page" id="page-2">2</div>   <div class="scroll-page" id="page-3">3</div> </div> 

CSS

a {   display: inline-block;   width: 50px;   text-decoration: none; } nav, .scroll-container {   display: block;   margin: 0 auto;   text-align: center; } nav {   width: 339px;   padding: 5px;   border: 1px solid black; } .scroll-container {   width: 350px;   height: 200px;   overflow-y: scroll;   scroll-behavior: smooth; } .scroll-page {   display: flex;   align-items: center;   justify-content: center;   height: 100%;   font-size: 5em; } 

Result

Specifications

Specification
CSS Overflow Module Level 3 # smooth-scrolling

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