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CSS Properties

accent-color align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function backdrop-filter backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-repeat background-size border border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-decoration-break box-shadow box-sizing break-after break-before break-inside caption-side caret-color @charset clear clip clip-path color column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns content counter-increment counter-reset cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face font-family font-feature-settings font-kerning font-size font-size-adjust font-stretch font-style font-variant font-variant-caps font-weight gap grid grid-area grid-auto-columns grid-auto-flow grid-auto-rows grid-column grid-column-end grid-column-gap grid-column-start grid-gap grid-row grid-row-end grid-row-gap grid-row-start grid-template grid-template-areas grid-template-columns grid-template-rows hanging-punctuation height hyphens image-rendering @import isolation justify-content @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-bottom margin-left margin-right margin-top mask-image mask-mode mask-origin mask-position mask-repeat mask-size max-height max-width @media min-height min-width mix-blend-mode object-fit object-position opacity order orphans outline outline-color outline-offset outline-style outline-width overflow overflow-wrap overflow-x overflow-y padding padding-bottom padding-left padding-right padding-top page-break-after page-break-before page-break-inside perspective perspective-origin pointer-events position quotes resize right row-gap scroll-behavior tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-decoration-thickness text-indent text-justify text-overflow text-shadow text-transform top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function unicode-bidi user-select vertical-align visibility white-space widows width word-break word-spacing word-wrap writing-mode z-index



CSS animation-timing-function Property


Example

Play an animation with the same speed from beginning to end:

div {
  animation-timing-function: linear;
}
Try it Yourself »

More "Try it Yourself" examples below.


Definition and Usage

The animation-timing-function specifies the speed curve of an animation.

The speed curve defines the TIME an animation uses to change from one set of CSS styles to another.

The speed curve is used to make the changes smoothly.

Default value: ease
Inherited: no
Animatable: no. Read about animatable
Version: CSS3
JavaScript syntax: object.style.animationTimingFunction="linear" Try it

Browser Support

The numbers in the table specify the first browser version that fully supports the property.

Numbers followed by -webkit-, -moz-, or -o- specify the first version that worked with a prefix.

Property
animation-timing-function 43.0
4.0 -webkit-
10.0 16.0
5.0 -moz-
9.0
4.0 -webkit-
30.0
15.0 -webkit-
12.0 -o-


CSS Syntax

animation-timing-function: linear|ease|ease-in|ease-out|ease-in-out|step-start|step-end|steps(int,start|end)|cubic-bezier(n,n,n,n)|initial|inherit;

The animation-timing-function uses a mathematical function, called the Cubic Bezier curve, to make the speed curve. You can use your own values in this function, or use one of the pre-defined values:

Property Values

Value Description Demo
linear The animation has the same speed from start to end Play it »
ease Default value. The animation has a slow start, then fast, before it ends slowly Play it »
ease-in The animation has a slow start Play it »
ease-out The animation has a slow end Play it »
ease-in-out The animation has both a slow start and a slow end Play it »
step-start Equivalent to steps(1, start)
step-end Equivalent to steps(1, end)
steps(int,start|end) Specifies a stepping function, with two parameters. The first parameter specifies the number of intervals in the function. It must be a positive integer (greater than 0). The second parameter, which is optional, is either the value "start" or "end", and specifies the point at which the change of values occur within the interval. If the second parameter is omitted, it is given the value "end"
cubic-bezier(n,n,n,n) Define your own values in the cubic-bezier function
Possible values are numeric values from 0 to 1
initial Sets this property to its default value. Read about initial
inherit Inherits this property from its parent element. Read about inherit

Tip: Try the different values in the "More Examples" section below.


More Examples

Example

To better understand the different timing function values;
Here are five different <div> elements with five different values:

#div1 {animation-timing-function: linear;}
#div2 {animation-timing-function: ease;}
#div3 {animation-timing-function: ease-in;}
#div4 {animation-timing-function: ease-out;}
#div5 {animation-timing-function: ease-in-out;}
Try it Yourself »

Example

Same as the example above, but the speed curves are defined with the cubic-bezier function:

#div1 {animation-timing-function: cubic-bezier(0,0,1,1);}
#div2 {animation-timing-function: cubic-bezier(0.25,0.1,0.25,1);}
#div3 {animation-timing-function: cubic-bezier(0.42,0,1,1);}
#div4 {animation-timing-function: cubic-bezier(0,0,0.58,1);}
#div5 {animation-timing-function: cubic-bezier(0.42,0,0.58,1);}
Try it Yourself »

Related Pages

CSS tutorial: CSS Animations

HTML DOM reference: animationTimingFunction property