SVGNumberList

The length property of the SVGNumberList interface returns the number of items in the list. It is an alias of numberOfItems to make SVG lists more array-like.

The numberOfItems property of the SVGNumberList interface returns the number of items in the list. length is an alias of it.

The appendItem() method of the SVGNumberList interface inserts a new item at the end of the list. If the given item is already in a list, it is removed from its previous list before it is inserted into this list. The inserted item is the item itself and not a copy.

The clear() method of the SVGNumberList interface clears all existing items from the list, with the result being an empty list.

The getItem() method of the SVGNumberList interface returns the specified item from the list. The returned item is the item itself and not a copy. Any changes made to the item are immediately reflected in the list. The first item is indexed 0.

The initialize() method of the SVGNumberList interface clears all existing items from the list and re-initializes the list to hold the single item specified by the parameter. If the inserted item is already in a list, it is removed from its previous list before it is inserted into this list. The inserted item is the item itself and not a copy. The return value is the item inserted into the list.

The insertItemBefore() method of the SVGNumberList interface inserts a new item into the list at the specified position. The first item is indexed 0. The inserted item is the item itself and not a copy.

The removeItem() method of the SVGNumberList interface removes an existing item at the given index from the list.

The replaceItem() method of the SVGNumberList interface replaces an existing item in the list with a new item. If the new item is already in a list, it is removed from its previous list before it is inserted into this list. The inserted item is the item itself and not a copy. If the item is already in this list, note that the index of the item to replace is before the removal of the item.