SVGNumberList: insertItemBefore() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
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.
- If the new item is already in a list, it is removed from its previous list before it is inserted into this list.
- 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 the
length, then the new item is appended to the end of the list.
Syntax
js
insertItemBefore(newItem, index)
Parameters
Return value
The SVGNumber that was added to the list.
Exceptions
NoModificationAllowedErrorDOMException-
Thrown if the
SVGNumberListcorresponds to a read-only attribute or when the object itself is read-only.
Specifications
| Specification |
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| Scalable Vector Graphics (SVG) 2 # __svg__SVGNameList__insertItemBefore |
Browser compatibility
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Legend
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- Full support
- Full support