GoJS

To create a diagram, you need an HTML element to host it, a go.Diagram instance, templates to define how nodes and links look, and a model to provide the data. The following example demonstrates a basic graph with nodes and links using the fluent add() API and data binding.

<div id="myDiagramDiv" style="width:400px; height:200px;"></div>

<script src="https://cdn.jsdelivr.net/npm/gojs"></script>

<script>
  const myDiagram = new go.Diagram('myDiagramDiv', {
    // create a Diagram for the HTML div element
    'undoManager.isEnabled': true // enable undo & redo
  });

  // define a simple Node template
  // the Shape will automatically surround the TextBlock
  myDiagram.nodeTemplate = new go.Node('Auto')
    .add(  // add a Shape and a TextBlock to this "Auto" Panel
      new go.Shape('RoundedRectangle', { strokeWidth: 0, fill: 'white' }) // no border; default fill is white
        .bind('fill', 'color'), // Shape.fill is bound to Node.data.color
      new go.TextBlock({ margin: 8, font: 'bold 14px sans-serif', stroke: '#333' }) // some room around the text
        .bind('text', 'key') // TextBlock.text is bound to Node.data.key
    );

  // but use the default Link template, by not setting Diagram.linkTemplate

  // create the model data that will be represented by Nodes and Links
  myDiagram.model = new go.GraphLinksModel(
    [
      { key: 'Alpha', color: 'lightblue' },
      { key: 'Beta', color: 'orange' },
      { key: 'Gamma', color: 'lightgreen' },
      { key: 'Delta', color: 'pink' }
    ],
    [
      { from: 'Alpha', to: 'Beta' },
      { from: 'Alpha', to: 'Gamma' },
      { from: 'Beta', to: 'Beta' },
      { from: 'Gamma', to: 'Delta' },
      { from: 'Delta', to: 'Alpha' }
    ]
  );
</script>