ReadonlylengthThe length property of the SVGLengthList interface returns the number of items in the list.
ReadonlynumberThe numberOfItems property of the SVGLengthList interface returns the number of items in the list.
The clear() method of the SVGLengthList interface clears all existing items from the list, with the result being an empty list.
The getItem() method of the SVGLengthList interface returns the specified item from the list.
The removeItem() method of the SVGLengthList interface removes an existing item at the given index from the list.
The
SVGLengthListinterface defines a list of SVGLength objects.MDN Reference