Add sonar as a class to any element to activate.
Use sonar-infinite to make the animation loop forever.
You can use sonar-stroke for border animation, or sonar-fill for background animation.
Use sonar-delay to set the animation delay to 1s. You can also use sonar-delay-short, sonar-delay-shorter, sonar-delay-long and sonar-delay-longer for different timings
Sonar will inherit the border/background colors. But sonar supports all the bootstrap colors, so you can use sonar-default, sonar-primary, sonar-success, sonar-info, sonar-warning, and sonar-danger.
All colors are compatible with sonar-stroke and sonar-fill