SVGLengthList: 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 January 2020.
The insertItemBefore()
method of the SVGLengthList
interface inserts a new item into the list at the specified position. The first item is indexed 0. 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 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
insertItemBefore(newItem, index)
Parameters
Return value
The SVGLength
that was added to the list.
Exceptions
DOMException
NoModificationAllowedError
-
Thrown when the list is read-only.
Examples
See SVGLengthList
for a complete example.
Specifications
No specification found
No specification data found for api.SVGLengthList.insertItemBefore
.
Check for problems with this page or contribute a missing spec_url
to mdn/browser-compat-data. Also make sure the specification is included in w3c/browser-specs.
Browser compatibility
BCD tables only load in the browser