test/sankey.html

<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="esl.js"></script>
        <script src="config.js"></script>
        <script src="config.js"></script>
        <script src="lib/jquery.min.js"></script>
    </head>
    <body>
        <style>
            html, body, #main {
                width: 100%;
                height: 90%;
                /*border: 1px solid #000;*/
            }
        </style>
        <div id="main"><div>
        <script>
            require([
                'echarts',
                'echarts/chart/sankey',
                'echarts/component/tooltip'
                ], function (echarts) {

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

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

                    $.getJSON('./data/energy.json')
                    .done(function(data) {
                        chart.setOption({
                            tooltip: {
                                trigger: 'item',
                                triggerOn: 'mousemove'

                            },
                            series: [
                                {
                                    type: 'sankey',
                                    layout:'none',
                                    data: data.nodes,
                                    links: data.links,
                                    lineStyle: {
                                        normal: {
                                            curveness: 0.5
                                        }
                                    }
                                }
                            ]
                        });
                    });
                });
        </script>
    </body>
</html>