Stroke

Nodes have two strokes: the inner stroke (controlled by the innerStroke attribute) and the outer stroke (controlled by the outerStroke attribute).

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <script src="../build/ogma.min.js"></script>
  <style>
    #graph-container { top: 0; bottom: 0; left: 0; right: 0; position: absolute; margin: 0; overflow: hidden; }
  </style>
</head>
<body>
  <div id="graph-container"></div>

<script>
'use strict';

var ogma = new Ogma({
  container: 'graph-container'
});

// Define the default stroke appearance
// innerStroke is the node border
ogma.styles.addNodeRule({
  innerStroke: {
    color: 'black',
    width: 2,
    minVisibleSize: 5
  }
});

// Define the stroke appearance on hover
ogma.styles.setHoveredNodeAttributes({
  outerStroke: {
    width: 10,
    color: 'red'
  }
});

// Define the stroke appearance on selection
ogma.styles.setSelectedNodeAttributes({
  innerStroke: {
    color: 'white'
  },
  outerStroke: {
    width: 7,
    color: 'red'
  }
});

// Generate a random graph and assign it to Ogma
ogma.generate.random({
  nodes: 10,
  edges: 5
}).then(function(graph) {
  ogma.setGraph(graph);
  ogma.view.locateGraph();
});
</script>
</body>
</html>