Echarts在线免费图表

 
            option = {
    series: {
        type: 'sankey',
        data: [{
            name: 'a'
        }, {
            name: 'b'
        },
        {
            name: 'e',
            depth: 0
        }],
        levels: [{
            depth: 0,
            itemStyle: {opacity: 0}
        }],
        links: [{
            source: 'e',
            target: 'a',
            value: 15
        },{
            source: 'a',
            target: 'b',
            value: 3
        }]
    }
};