首先，布局將更高級別的節點放在中心，因此您的內部節點應該有級別 2，而外部節點應該有級別 1。其次，我不知道 levelWidth 選項是如何工作的，但是使用默認值而不是 2 工作.
var cy = window.cy = cytoscape({
container: document.getElementById('cy'),
style: [{
selector: 'node',
css: {
'content': 'data(id)'
}
},
{
selector: 'edge',
css: {
'curve-style': 'straight',
}
}
],
elements: [
{data: {
id: 'innerA', level: 2 },
group: 'nodes'
},
{data: {
id: 'innerB', level: 2 },
group: 'nodes'
},
{data: {
id: 'innerC', level: 2 },
group: 'nodes'
},
{data: {
id: 'innerD', level: 2 },
group: 'nodes'
},
{data: {
id: 'outA', level: 1 },
group: 'nodes'
},
{data: {
id: 'outB', level: 1 },
group: 'nodes'
},
{data: {
id: 'outC', level: 1 },
group: 'nodes'
},
{data: {
id: 'outD', level: 1 },
group: 'nodes'
},
{data: {
id: 'outE', level: 1 },
group: 'nodes'
},
{data: {
id: 'outF', level: 1 },
group: 'nodes'
},
{data: {
id: 'outG', level: 1 },
group: 'nodes'
},
{data: {
id: 'outH', level: 1 },
group: 'nodes'
},
{
data: { source: 'innerA', target: 'outA' },
group: 'edges',
},
{
data: { source: 'innerB', target: 'outC' },
group: 'edges',
},
{
data: { source: 'innerC', target: 'outE' },
group: 'edges',
},
{
data: { source: 'innerD', target: 'outG' },
group: 'edges',
},
],
layout: {
name: 'concentric',
concentric: function( node ){
return node.data("level");
},
minNodeSpacing: 50
}
});
body {
font: 14px helvetica neue, helvetica, arial, sans-serif;
}
#cy {
height: 95%;
width: 95%;
left: 0;
top: 0;
position: absolute;
}
<html>
<head>
<meta charset=utf-8 />
<meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
<script src="https://unpkg.com/[email protected]/dist/cytoscape.min.js">
</script>
</head>
<body>
<div id="cy"></div>
</body>
</html>
