This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The numberOfItems property of the SVGLengthList interface returns the number of items in the list. length is an alias of it.
A non-negative integer that represents the number of items in the list.
See SVGLengthList for a complete example.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
numberOfItems |
1 | 12 | 1.5 | ≤12.1 | 3 | 18 | 4 | ≤12.1 | 1 | 1.0 | 3 | 1 |
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https://developer.mozilla.org/en-US/docs/Web/API/SVGLengthList/numberOfItems