echarts In graph，when the node link to it self ，the line is invisible almost

Version

4.9.0

Steps to reproduce

option = {
    title: {
        text: 'Graph 简单示例'
    },
    tooltip: {},
    animationDurationUpdate: 1500,
    animationEasingUpdate: 'quinticInOut',
    series: [
        {
            type: 'graph',
            layout: 'none',
            symbolSize: 10,
            roam: true,
            label: {
                show: true
            },
            edgeSymbol: ['circle', 'arrow'],
            edgeSymbolSize: [4, 10],
            edgeLabel: {
                fontSize: 20
            },
            data: [{
                name: '节点1',
                x: 300,
                y: 300
            }, {
                name: '节点2',
                x: 800,
                y: 300
            }],
            // links: [],
            links: [{
                source: 0,
                target: 1,
                symbolSize: [5, 20],
                label: {
                    show: true
                },
                lineStyle: {
                    curveness: 0.2
                }
            }, {
                source: '节点2',
                target: '节点1',
                label: {
                    show: true
                },
                lineStyle: {
                    curveness: 0.2
                }
            }, {
                source: '节点1',
                target: '节点1',
                // label: {
                //     show: true
                // },
                lineStyle: {
                    curveness: 0.2
                }
            }, ],
            lineStyle: {
                opacity: 0.9,
                width: 2,
                curveness: 0
            }
        }
    ]
};

What is expected?

the link invisible almost

What is actually happening?

the link obvious

Nov 09 '20 08:11 hellokidder

Hi! We've received your issue and please be patient to get responded. 🎉 The average response time is expected to be within one day for weekdays.

In the meanwhile, please make sure that you have posted enough image to demo your request. You may also check out the API and chart option to get the answer.

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