Progress Bar support to animate the progress by using animation property. Enable the animation by setting enable property and also you can control the speed by using duration property.
<ejs-progressbar id="container" minimum="0" maximum="100" type='Linear' value=90
trackColor="#FFFFFF">
<e-progressbar-animation enable=true duration=2000 delay=0></e-progressbar-animation>
</ejs-progressbar>