• void clear()
• DOMString initialize(in DOMString newItem)
• DOMString getItem(in unsigned long index)
• DOMString insertItemBefore(in DOMString newItem, in unsigned long index)
• DOMString replaceItem(in DOMString newItem, in unsigned long index)
• DOMString removeItem(in unsigned long index)
• DOMString appendItem(in DOMString newItem)

• readonly unsigned long numberOfItems
• readonly unsigned long length

Clears all existing current items from the list, with the result being an empty list.

Exceptions:

• a DOMException with code NO_MODIFICATION_ALLOWED_ERR is raised when the list corresponds to a read only attribute or when the object itself is read only.

Clears all existing current 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.

Exceptions:

• a DOMException with code NO_MODIFICATION_ALLOWED_ERR is raised when the list corresponds to a read only attribute or when the object itself is read only.

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 number 0.

Exceptions:

• a DOMException with code NO_MODIFICATION_ALLOWED_ERR is raised when the list corresponds to a read only attribute or when the object itself is read only.

Inserts a new item into the list at the specified position. The first item is number 0. If newItem 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 insert before is before the removal of the item. If the index is equal to 0, then the new item is inserted at the front of the list. If the index is greater than or equal to numberOfItems, then the new item is appended to the end of the list.

Exceptions:

• a DOMException with code NO_MODIFICATION_ALLOWED_ERR is raised when the list corresponds to a read only attribute or when the object itself is read only.

Replaces an existing item in the list with a new item. If newItem 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.

Exceptions:

• a DOMException with code NO_MODIFICATION_ALLOWED_ERR is raised when the list corresponds to a read only attribute or when the object itself is read only.
• a DOMException with code INDEX_SIZE_ERR is raised if the index number is greater than or equal to numberOfItems.

Removes an existing item from the list.

Exceptions:

• a DOMException with code NO_MODIFICATION_ALLOWED_ERR is raised when the list corresponds to a read only attribute or when the object itself is read only.
• a DOMException with code INDEX_SIZE_ERR is raised if the index number is greater than or equal to numberOfItems.

Inserts a new item at the end of the list. If newItem 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.

Exceptions:

• a DOMException with code NO_MODIFICATION_ALLOWED_ERR is raised when the list corresponds to a read only attribute or when the object itself is read only.