SVGPointList: 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 SVGPointList interface inserts a DOMPoint before another item in the list.
Syntax
insertItemBefore(obj, index)
Parameters
obj-
A
DOMPointobject containing the coordinates of the point to be inserted. index-
The index of the item the object should be inserted before. If the index passed in is greater than the length of the list, then index will be set to the list length and the item inserted before the last item in the list.
Return value
The DOMPoint object that was inserted.
Exceptions
NoModificationAllowedErrorDOMException-
Thrown if the list is read-only.
Examples
The following example shows an SVG which contains a <polyline> with five coordinate pairs. A new DOMPoint is created, and inserted before the point at index 2.
<svg id="svg" viewBox="-10 -10 120 120" xmlns="http://www.w3.org/2000/svg">
<polyline
id="example"
stroke="black"
fill="none"
points="50,0 21,90 98,35 2,35 79,90" />
</svg>
const example = document.getElementById("example");
const point = document.getElementById("svg").createSVGPoint();
point.y = 10;
point.x = 10;
console.log(example.points.insertItemBefore(point, 2));
Specifications
| Specification |
|---|
| Scalable Vector Graphics (SVG) 2 # __svg__SVGNameList__insertItemBefore |
Browser compatibility
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