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Transitions
{
const svg = d3.select(html`<svg height = 300 width = 600 style = "border:1px black solid"></svg>`)
yield svg.node()
const circle = svg.append("circle")
.attr("r",30)
.attr("fill","steelblue")
.attr("stroke","black")
.attr("cx",0)
.attr("cy",0)
await circle.transition().duration(1000).ease(d3.easeBounceOut).attr("cx",600).end()
circle.transition().duration(1000).ease(d3.easeBounceOut).attr("cy",300)
}
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