echarts折线图点击空白处获取值
如图
点击空白处获取 当前值
使用gerZr能监听空白处,但是值不知道怎么获取
https://echarts.apache.org/examples/zh/editor.html?c=line-simple
let upInstaValue = [],
upMaxHold = [],
upMinHold = [];
for (let i = 0; i < 100; i++) {
//随机生成0-100数据
upInstaValue.push(Math.floor(Math.random() * 50) + 10);
upMaxHold.push(Math.floor(Math.random() * 50) + 10);
upMinHold.push(Math.floor(Math.random() * 50) + 10);
}
let upInstaValue2 = [],
upMaxHold2 = [],
upMinHold2 = [];
// x轴起始值
let up = 870;
// x轴终止值
let down = 915;
let step = (915 - 870) / upInstaValue.length; // 计算每个数据点的间隔
for (var i = 0; i < upInstaValue.length; i++) {
up = Math.round((up + step) * 1000) / 1000;
down = Math.round((down + step) * 1000) / 1000;
upInstaValue2.push([up, upInstaValue[i]]);
upMinHold2.push([up, upMinHold[i]]);
upMaxHold2.push([up, upMaxHold[i]]);
}
var option = {
tooltip: {
trigger: 'axis',
valueFormatter: function (value) {
return value + 'M';
}
},
dataZoom: {
type: 'inside'
},
xAxis: {
type: 'value',
boundaryGap: false,
min: 870,
max: 915,
axisLine: { onZero: false }
},
yAxis: {
type: 'value',
axisLine: {
show: true //坐标轴线
}
},
grid: {
x: 40,
y: 10,
x2: 30,
y2: 30
},
series: [
{
name: '当前值',
type: 'line',
smooth: true,
symbolSize: 0,
data: upInstaValue2
},
{
name: '最大值',
type: 'line',
smooth: true,
symbolSize: 0,
data: upMaxHold2
},
{
name: '最小值',
type: 'line',
smooth: true,
symbolSize: 0,
data: upMinHold2
}
]
};
myChart.getZr().on('click',function(params){
let point=[params.offsetX,params.offsetY];
console.log(point);
})