d3-force node move example

<!DOCTYPE html>
<html>
<head>
	<script src='https://cdnjs.cloudflare.com/ajax/libs/d3/4.13.0/d3.min.js'></script>
</head>
<button id="clickMe" type="button">Move Nodes</button>
<body>
	<svg id="svg" width="1200" height="500"></svg>

const trtCenter = width / 5
    const cntrlCenter = width / 1.5
    
    let sampleData = d3.range(24).map((d,i) => ({r: 40 - i * 0.5}))
    
    // define force
    let force = d3.forceSimulation()
    	.force('charge', d3.forceManyBody().strength(1))
    	force.force('x', d3.forceX().strength(.3).x( width / 2))
		force.force('y', d3.forceY().strength(.3).y(height / 3.5))
    	.force('collision', d3.forceCollide(d => 12))    	
    	.nodes(sampleData)
    	.on('tick', changeNetwork)

let dots = svg.selectAll('.dot')
    	.data(sampleData)
    	.enter()
    	.append('g')
    	.attr('class', 'dot')
    	.attr('group', (d,i) => i % 2 == 0 ? 'trt' : 'ctrl')
    	.append('circle')
    	.attr('r', 10)
    	.attr('fill', (d,i) => i % 2 == 0 ? 'pink' : 'olive')
    	.attr('stroke', 'black')
    	.attr('stroke-width', .4)

function nodeTreatmentPos(d) {
      return d.index % 2 == 0 ? trtCenter : cntrlCenter;
    }

function changeNetwork() {
      d3.selectAll('g.dot')
      	.attr('transform', d=> `translate(${d.x}, ${d.y})`)
    }
  
    // 
	function moveNodes() {
	  force.force('center', null)
		.force('collision', d3.forceCollide(d => 12))
		.alphaDecay(.08)
		force.force('x', d3.forceX().strength(1).x(nodeTreatmentPos))
		force.force('y', d3.forceY().strength(1).y(height / 3.5))
        force.alpha(.4).restart();
	}

// force for center
	function moveCenter() {
		force.force('center', null)
		.force('collision', d3.forceCollide(d => 12))
		force.force('x', d3.forceX().strength(1.).x( width / 2))
		force.force('y', d3.forceY().strength(1).y(height / 3.5))
		force.alpha(.7).restart();
		}

// resolve locations of node on cliks
	let toCenter = true;

d3.select('#clickMe')
		.on('click', function() {
			toCenter === true ? moveNodes() : moveCenter()
			toCenter = !toCenter
		})

</script>
</body>
</html>

https://cdnjs.cloudflare.com/ajax/libs/d3/4.13.0/d3.min.js