The SVGAnimatedString interface represent string attributes which can be animated from each SVG declaration. You need to create SVG attribute before doing anything else, everything should be declared inside this.

Documentation SVGAnimatedString by Mozilla Contributors, licensed under CC-BY-SA 2.5.

See:

Variables

read onlyanimVal:String

This is a DOMString representing the animation value. If the given attribute or property is being animated it contains the current animated value of the attribute or property. If the given attribute or property is not currently being animated, it contains the same value as baseVal.

baseVal:String

This is a DOMString representing the base value. The base value of the given attribute before applying any animations. Setter throws DOMException.