[Echart]图谱中的富文本标签

series-graph.links.label.rich

option = {
  title: {
    text: 'Basic Graph'
  },
  tooltip: {},
  animationDurationUpdate: 1500,
  animationEasingUpdate: 'quinticInOut',
  series: [
    {
      type: 'graph',
      // layout: 'force',
      symbolSize: 50,
      roam: true,
      label: {
        show: true
      },
      edgeSymbol: ['circle', 'arrow'],
      edgeSymbolSize: [4, 10],
      edgeLabel: {
        fontSize: 20
      },
      data: [
        {
          name: 'Node 1',
          x: 300,
          y: 300
        },
        {
          name: 'Node 2',
          x: 800,
          y: 300
        },
        {
          name: 'Node 3',
          x: 550,
          y: 100
        },
        {
          name: 'Node 4',
          x: 550,
          y: 500
        }
      ],
      // links: [],
      links: [
        {
          source: 0,
          target: 0,
          symbolSize: [5, 20],
          label: {
            show: true,
            formatter: [
              '{a|这段文本采用样式a}'
            ].join('\n'),
            rich: {
              a: {
                width: 6,
                fontSize: 14,
                fontWeight: 700,
                padding: [0, 0, 175, 0],
                backgroundColor: {
                  image:
                    'data:image/png;base64,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'
                }
              }
            }
          },
          lineStyle: {
            width: 5,
            curveness: 0.2
          }
        },
        {
          source: 'Node 2',
          target: 'Node 1',
          label: {
            show: true
          },
          lineStyle: {
            curveness: 0.2
          }
        },
        {
          source: 'Node 1',
          target: 'Node 3'
        },
        {
          source: 'Node 2',
          target: 'Node 3'
        },
        {
          source: 'Node 2',
          target: 'Node 4'
        },
        {
          source: 'Node 1',
          target: 'Node 4'
        }
      ],
      lineStyle: {
        opacity: 0.9,
        width: 2,
        curveness: 0
      }
    }
  ]
};