This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The x read-only property of the SVGRectElement interface describes the horizontal coordinate of the position of an SVG rectangle as a SVGAnimatedLength. The <coordinate> is a length in the user coordinate system that is the given distance from the origin of the user coordinate system along the x-axis. Its syntax is the same as that for <length>.
It reflects the <rect> element's x geometric attribute value. The CSS x property takes precedence over the SVG x geometric attribute, so the value may not reflect the element's appearance. The default value is 0.
const rectangle = document.querySelector("rect");
const leftPosition = rectangle.x;
console.log(leftPosition.baseVal.value); // the `x` value
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
x |
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/SVGRectElement/x