image.png

• link.source()
• link.target()
• link.clone()
• link.addTo()
• link.vertices()
• link.router()
• link.connector()
• link.attr()

var graph = new joint.dia.Graph;
    
var paper = new joint.dia.Paper({
    el: document.getElementById('myholder'),
    model: graph,
    width: 600,
    height: 300,
    // gridSize: 1,
    drawGrid: true,
    background: {
        color: 'rgba(0, 255, 0, 0.3)'
    }
});

var rect = new joint.shapes.standard.Rectangle();
rect.position(100, 30);
rect.resize(100, 40);
rect.attr({
    body: {
        fill: 'blue'
    },
    label: {
        text: 'Hello',
        fill: 'white'
    }
});
rect.addTo(graph);

var rect2 = new joint.shapes.standard.Rectangle();
rect2.position(400, 30);
rect2.resize(100, 40);
rect2.attr({
    body: {
        fill: '#2C3E50',
        rx: 5,
        ry: 5,
        strokeWidth: 2
    },
    label: {
        text: 'World',
        fill: '#3498DB',
        fontSize: 18,
        fontWeight: 'blod',
        fontVariant: 'small-caps'
    }
});
rect2.addTo(graph);

var link = new joint.shapes.standard.Link();
link.source(rect);
link.target(rect2);
link.attr({
    line: {
        stroke: 'blue',
        strokeWidth: 1,
        sourceMarker: {
            'type': 'path',
            'stroke': 'black',
            'fill': 'red',
            'd': 'M 10 -5 0 0 10 5 Z'
        },
        targetMarker: {
            'type': 'path',
            'stroke': 'black',
            'fill': 'yellow',
            'd': 'M 10 -5 0 0 10 5 Z'
        }
    }
});
link.labels([{
    attrs: {
        text: {
            text: 'Hello World!'
        }
    }
}]);
link.addTo(graph);

var rect3 = new joint.shapes.standard.Rectangle();
rect3.position(100, 130);
rect3.resize(100, 40);
rect3.attr({
    body: {
        fill: '#e74c3c',
        rx: 20,
        ry: 20,
        strokeWidth: 0
    },
    label: {
        text: 'Hello',
        fill: '#ecf0f1',
        fontSize: 11,
        fontVariant: 'small-caps'
    }
});
rect3.addTo(graph);

var rect4 = new joint.shapes.standard.Rectangle();
rect4.position(400, 130);
rect4.resize(100, 40);
rect4.attr({
    body: {
        fill: '#8e44ad',
        strokeWidth: 0
    },
    label: {
        text: 'World!',
        fill: 'white',
        fontSize: 13
    }
});
rect4.addTo(graph);

var link2 = new joint.shapes.standard.Link();
link2.source(rect3);
link2.target(rect4);
link2.vertices([
    new g.Point(250, 100),
    new g.Point(300, 150),
    new g.Point(350, 200)
]);
link2.router('orthogonal');
link2.connector('rounded');
link2.attr({
    line: {
        stroke: 'gray',
        strokeWidth: 4,
        strokeDasharray: '4 2',
        sourceMarker: {
            'type': 'image',
            'xlink:href': 'http://cdn3.iconfinder.com/data/icons/49handdrawing/24x24/left.png',
            'width': 24,
            'height': 24,
            'y': -12
        },
        targetMarker: {
            'type': 'image',
            'xlink:href': 'http://cdn3.iconfinder.com/data/icons/49handdrawing/24x24/left.png',
            'width': 24,
            'height': 24,
            'y': -12
        }
    }
});
link2.addTo(graph);

var link3 = new joint.shapes.standard.Link();
link3.source(rect3);
link3.target(rect4);
link3.connector('jumpover', { size: 10 });
link3.addTo(graph);

var rect5 = new joint.shapes.standard.Rectangle();
rect5.position(100, 230);
rect5.resize(100, 40);
rect5.attr({
    body: {
        fill: '#2ECC71',
        strokeDasharray: '10,2'
    },
    label: {
        text: 'Hello',
        fill: 'black',
        fontSize: 13
    }
});
rect5.addTo(graph);

var rect6 = new joint.shapes.standard.Rectangle();
rect6.position(400, 230);
rect6.resize(100, 40);
rect6.attr({
    body: {
        fill: '#F39C12',
        rx: 20,
        ry: 20,
        strokeDasharray: '1,1'
    },
    label: {
        text: 'World!',
        fill: 'gray',
        fontSize: 18,
        fontWeight: 'bold',
        fontVariant: 'small-caps',
        textShadow: '1px 1px 1px black'
    }
});
rect6.addTo(graph);

var link4 = new joint.shapes.standard.Link();
link4.source(rect5);
link4.target(rect6);
link4.attr({
    line: {
        stroke: '#3498DB',
        strokeWidth: 3,
        strokeDasharray: '5 5',
        strokeDashoffset: 7.5,
        sourceMarker: {
            'type': 'path',
            'stroke': 'none',
            'fill': '#3498DB',
            'd': 'M 20 -10 0 0 20 10 Z \
                M 40 -10 20 0 40 10 Z'
        },
        targetMarker: {
            'type': 'path',
            'stroke': 'none',
            'fill': '#3498DB',
            'd': 'M 7.5 -10 2.5 -10 2.5 10 7.5 10 Z \
                M 17.5 -10 12.5 -10 12.5 10 17.5 10 Z \
                M 40 -10 20 0 40 10 Z'
        }
    }
});
link4.addTo(graph);

參考
Joint tutorial