Web/API/SVGNumberList

SVG number list interface

The SVGNumberList defines a list of SVGNumber objects.

An SVGNumberList object can be designated as read only, which means that attempts to modify the object will result in an exception being thrown.

Note: Starting in Gecko 5.0,the SVGNumberList DOM interface is now indexable and can be accessed like arrays.

Interface overview

Also implement	`None`
Methods	`void clear()` `SVGNumber` `initialize(in SVGNumber` `newItem`) `SVGNumber` `getItem(in unsigned long index)` `SVGNumber` `insertItemBefore(in SVGNumber` `newItem`, in unsigned long `index`) `SVGNumber` `replaceItem(in SVGNumber` `newItem`, in unsigned long `index`) `SVGNumber` `removeItem(in unsigned long index)` `SVGNumber` `appendItem(in SVGNumber` `newItem`)
Properties	readonly unsigned long `numberOfItems` readonly unsigned long `length` '
Normative document	SVG 1.1 (2nd Edition)

Properties

Name	Type	Description
`numberOfItems`	unsigned long	The number of items in the list.
`length` '	unsigned long	The number of items in the list.

Methods

Name & Arguments	Return	Description
`clear()`	`void`	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.
`initialize(in SVGNumber` `newItem`)	`SVGNumber`	Clears all existing current items from the list and re-initializes the list to hold the single item specified by `newItem`. 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.
`getItem(in unsigned long index)`	`SVGNumber`	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.
`insertItemBefore(in SVGNumber` `newItem`, in unsigned long `index`)	`SVGNumber`	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.
`replaceItem(in SVGNumber` `newItem`, in unsigned long `index`)	`SVGNumber`	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 `index` is greater than or equal to `numberOfItems`.
`removeItem(in unsigned long index)`	`SVGNumber`	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 `index` is greater than or equal to `numberOfItems`.
`appendItem(in SVGNumber` `newItem`)	`SVGNumber`	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.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`SVGNumberList`	Chrome Full support Yes	Edge Full support ≤18	Firefox Full support Yes	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support: Full support
Compatibility unknown: Compatibility unknown

SVGNumberList by Mozilla Contributors is licensed under CC-BY-SA 2.5.