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 January 2020.

The insertItemBefore() method of the SVGPointList interface inserts a point before another item in the list.

Syntax

js
insertItemBefore(obj, index)

Parameters

obj

An SVGPoint object 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 SVGPoint object that was inserted.

Exceptions

NoModificationAllowedError DOMException

Thrown if the list is read-only.

Examples

The following example shows an SVG which contains a <polyline> with five coordinate pairs. A new SVGPoint is created, and inserted before the point at index 2.

html
<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>
js
let example = document.getElementById("example");
let svgPoint = document.getElementById("svg").createSVGPoint();
svgPoint.y = 10;
svgPoint.x = 10;
console.log(example.points.insertItemBefore(svgPoint, 2));

Specifications

Specification
Scalable Vector Graphics (SVG) 2
# __svg__SVGNameList__insertItemBefore

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
insertItemBefore

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support