0๐
d3.select(`._${item.index}`)
.style("stroke-width", 2)
.style("fill", "black");
<circle
:r="item.radius"
:cx="item.x"
:cy="item.y"
:fill="item.fill"
:stroke="item.stroke"
:stroke-width="item.strokeWidth"
:class="`_${item.index}`"
/>
It was actually very simple, just added a class attribute and used that to select with d3.select
Source:stackexchange.com