CSS transition

The CSS transition property is a shortcut property for defining CSS transitions. It combines the four transition properties into a single property.

Specifically, the transition property combines the following properties: transition-property, transition-duration, transition-timing-function, and transition-delay.

Note that order is important. The values must be provided in the order as specified in the "Syntax" section below.

Syntax

transition: [<'transition-property'> || <'transition-duration'> || <'transition-timing-function'> || <'transition-delay'> [, [<'transition-property'> || <'transition-duration'> || <'transition-timing-function'> || <'transition-delay'>]]*

Possible Values

<'transition-property'>
Specifies which property to apply the transition to. For more information on this property, see transition-property.
<'transition-duration'>
Specifies how long the transition will last. For more information on this property, see transition-duration.
<'transition-timing-function'>
Specifies how the transition speeds up or slows down. Based on a cubic bézier curve. For more information on this property, see transition-timing-function.
<'transition-delay'>
Specifies how long to wait until the transition effect begins. For more information on this property, see transition-delay.

In addition, all CSS properties also accept the following CSS-wide keyword values as the sole component of their property value:

initial
Represents the value specified as the property's initial value.
inherit
Represents the computed value of the property on the element's parent.
unset
This value acts as either inherit or initial, depending on whether the property is inherited or not. In other words, it sets all properties to their parent value if they are inheritable or to their initial value if not inheritable.

Basic Property Information

Initial Value
See individual properties: transition-property, transition-duration, transition-timing-function, and transition-delay.
Applies To
All elements, and the :before and :after pseudo elements
Inherited?
No
Media
Interactive

Example Code

Basic CSS

transition: width 0.5s linear 1s;

Working Example within an HTML Document

<!DOCTYPE html>
<title>Example</title>
<style>
.resize { 
  background-color: yellowgreen;
  color: olivedrab;
  width: 40%;
  height: 20px; 
  padding: 10px;
  font-size: 1em;
  font-family: sans-serif;
  transition: width 0.5s cubic-bezier(0.25, 0.1, 0.25, 1.4) 0s, height 0.5s cubic-bezier(0.25, 0.1, 0.25, 1.4) 0s, font-size 0.5s cubic-bezier(0.25, 0.1, 0.25, 1.4) 0s;
}
.resize:hover {  
  width: 70%;
  height: 150px;
  font-size: 2em;
  font-weight: bold;
  background-color: beige;
} 
</style>

<div class="resize">Hover over me...</div>

Try it with the Online Editor

CSS Specifications

Browser Support

The following table provided by Caniuse.com shows the level of browser support for this feature.

Vendor Prefixes

For maximum browser compatibility many web developers add browser-specific properties by using extensions such as -webkit- for Safari, Google Chrome, and Opera (newer versions), -ms- for Internet Explorer, -moz- for Firefox, -o- for older versions of Opera etc. As with any CSS property, if a browser doesn't support a proprietary extension, it will simply ignore it.

This practice is not recommended by the W3C, however in many cases, the only way you can test a property is to include the CSS extension that is compatible with your browser.

The major browser manufacturers generally strive to adhere to the W3C specifications, and when they support a non-prefixed property, they typically remove the prefixed version. Also, W3C advises vendors to remove their prefixes for properties that reach Candidate Recommendation status.

Many developers use Autoprefixer, which is a postprocessor for CSS. Autoprefixer automatically adds vendor prefixes to your CSS so that you don't need to. It also removes old, unnecessary prefixes from your CSS.

You can also use Autoprefixer with preprocessors such as Less and Sass.