Opacity (SVG)The fill-opacity, and stroke-opacity SVG attributes and CSS properties control the transparency of a stroke or fill of an SVG element.svgSVGwidely≤2020-03-24≤2022-09-24https://w3c.github.io/svgwg/svg2-draft/render.html#ObjectAndGroupOpacityPropertieshttps://developer.mozilla.org/docs/Web/CSS/Reference/Properties/fill-opacitycss.properties.fill-opacitycss.properties.stroke-opacitysvg.global_attributes.fill-opacitysvg.global_attributes.stroke-opacityhttps://nowyoucanuse.com/features--opacity-svg.html