ACCELERATE Attribute | accelerate Property | Internet Development Index |
Sets or retrieves a value that applies an acceleration to an element's timeline.
Syntax
HTML <ELEMENT ACCELERATE = fRate... > Scripting object.accelerate [ = fRate ]
Possible Values
fRate Floating-point number that specifies a value between 0 and 1 that represents the portion of the timeline over which the acceleration is applied. The timeline refers to that timeline associated with a particular HTML element (such as a div or span), rather than the timeline associated with the entire document.
0 Default. Acceleration is not applied to the element's timeline. The property is read/write. The property has a default value of 0.
Remarks
If the REPEATCOUNT or REPEATDUR attribute is set on an element, the acceleration occurs each time the element repeats.
The ACCELERATE attribute is especially well suited to animation content and behaviors. Setting this attribute to a nonzero value does not affect the duration of the timeline.
The sum of the values for the ACCELERATE and DECELERATE attributes must not exceed 1. If the individual values of the ACCELERATE and DECELERATE attributes are between 0 and 1 and the sum is greater than 1, then both the ACCELERATE and DECELERATE attributes will be ignored and the timed element will behave as if neither attribute was specified.
This property is also commonly known as "ease-in" in some systems.
Example
This example uses the accelerate element to demonstrate an accelerated element's timeline.
<HTML XMLNS:t ="urn:schemas-microsoft-com:time"> <HEAD> <TITLE>accelerate Property</TITLE> <STYLE> .time { behavior: url(#default#time2) } </STYLE> <?IMPORT namespace="t" implementation="#default#time2"> </HEAD> <BODY TOPMARGIN=0 LEFTMARGIN=0 BGPROPERTIES="fixed" BGCOLOR="#FFFFFF" LINK="#000000" VLINK="#808080" ALINK="#000000"> <DIV ID="oDIV" CLASS="time" STYLE="position:absolute;top:75px;left:25px; height:50px;width:100px;background-color:yellow;text-align:center; font-color:black;font-size:large">Accelerating DIV </DIV> <t:ANIMATE targetElement="oDIV" attributeName="left" to="400" dur="3" accelerate="1" repeatCount="3"/> </BODY> </HTML>This feature requires Microsoft?Internet Explorer 5.5 or later. Click the following icon to install the latest version. Then reload this page to view the sample.
Standards Information
This property is defined in Synchronized Multimedia Integration Language (SMIL) 2.0
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Applies To
t:TRANSITIONFILTER, t:ANIMATE, t:ANIMATECOLOR, t:ANIMATEMOTION, t:ANIMATION, t:AUDIO, t:EXCL, t:IMG, t:MEDIA, t:PAR, t:REF, t:SEQ, time2, t:VIDEO
See Also
decelerate, Introduction to HTML+TIME