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   http://www.apache.org/licenses/LICENSE-2.0

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<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="lib/simpleRequire.js"></script>
        <script src="lib/config.js"></script>
        <script src="lib/jquery.min.js"></script>
    </head>
    <body>
        <style>
            html, body, #main {
                width: 100%;
                height: 100%;
                /*border: 1px solid #000;*/
            }
        </style>
        <div id="main"><div>
        <script>
            require(['echarts'], function (echarts) {

                var chart = echarts.init(document.getElementById('main'), null, {});

                window.onresize = function () {
                    chart.resize();
                };

                var testData =  {
                    nodes: [
                        {
                            name: 'a',
                        },
                        {
                            name: 'b',
                            depth: 2
                        },
                        {
                            name: 'a1',
                            depth: 4
                        },
                        {
                            name: 'b1'
                        },
                        {
                            name: 'c',
                            depth: 3
                        },
                        {
                            name: 'e',
                            depth: 1
                        }
                    ],
                    links: [
                        {
                            source: 'a',
                            target: 'a1',
                            value: 5
                        },
                        {
                            source: 'e',
                            target: 'b',
                            value: 3
                        },
                        {
                            source: 'a',
                            target: 'b1',
                            value: 0
                        },
                        {
                            source: 'b1',
                            target: 'a1',
                            value: 1
                        },
                        {
                            source: 'b1',
                            target: 'c',
                            value: 3
                        },
                        {
                            source: 'b',
                            target: 'c',
                            value: 3
                        }
                    ]
                };

                for (var i = 0; i < testData.nodes.length; i++) {
                    testData.nodes[i].tooltip = {
                        formatter: function () {
                            return 'hello';
                        }
                    }
                }

                chart.setOption({
                    color: ['#67001f', '#b2182b', '#d6604d', '#f4a582', '#fddbc7', '#d1e5f0', '#92c5de', '#4393c3', '#2166ac', '#053061'],
                    tooltip: {
                        trigger: 'item',
                        triggerOn: 'mousemove'
                    },
                    animation: false,
                    series: [
                        {
                            type: 'sankey',
                            bottom: '10%',
                            focusNodeAdjacency: true,
                            data: testData.nodes,
                            links: testData.links,
                            label: {
                                position: 'left'
                            },
                            // Used to test when the data is null whether it is work well.
                            // data: [],
                            // links: [],
                            lineStyle: {
                                normal: {
                                    color: 'source',
                                    curveness: 0.5
                                }
                            }
                        }
                    ]
                });
            });
        </script>
    </body>
</html>