echart 关于显示图片的几个方法

1.项目文件夹内图片

 {
          //别墅图片
          type: "scatter",
          coordinateSystem: "geo",
          itemStyle: {
            color: "#f00",
          },
          //此处加载项目文件夹内图片
          symbol: function (value, params,index) {
            return  'image://'+ require(`@/assets/villa/${params.dataIndex + 1}.png`)
          },
          tooltip: {
            formatter: '{b0}: {c0}<br />{b1}: {c1}'
          },
          symbolSize: [50, 50],
          symbolOffset: [0, -20],
          z: 999999,
          data: mapDate,
        },

2.创建元素方式

var domImg = document.createElement('img');
domImg.style.height = domImg.height = domImg.width = domImg.style.width = '8px';
domImg.src =
    'data:image/png;base64,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';

var domImgHover = document.createElement('img');
domImgHover.style.height = domImgHover.height = domImgHover.width = domImgHover.style.width = '8px';
domImgHover.src =
    'data:image/png;base64,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';
    
    
    

//地图
                {
                    type: 'map',
                    roam: true,
                    label: {
                        normal: {
                            show: false,
                            textStyle: {
                                color: '#fff',
                            },
                        },
                        emphasis: {
                            textStyle: {
                                color: '#fff',
                            },
                        },
                    },
                    itemStyle: {
                        normal: {
                            borderColor: '#2ab8ff',
                            borderWidth: 1,
                            areaColor: {
                                image: domImg,//加载之前声明的文件
                                repeat: 'repeat',
                            },
                            shadowColor: 'rgba(0, 0, 0, 0.5)',
                            shadowBlur: 0,
                            shadowOffsetX: 0,
                            shadowOffsetY: 1,
                        },
                        emphasis: {
                            areaColor: {
                                image: domImgHover,
                                repeat: 'repeat',
                            },
                            borderColor: '#2ab8ff',
                            borderWidth: 1,
                            shadowColor: 'rgba(0, 255, 255, 0.7)',
                            shadowBlur: 10,
                            shadowOffsetX: 0,
                            shadowOffsetY: 1,
                            label: {
                                show: false,
                            },
                        },
                    },
                    zoom: 1.1,
                    roam: false,
                    map: 'bd',
                },

3.base64

4.网络图片格式

'image://http://xxx.xxx.xxx/a/b.png'