Do not display the dividing line (background line) of the Echarts coordinate axis in the grid area

 1. The dividing line of the coordinate axis in the grid area. 

 

        Link:---->   Separating line

 yAxis: [
      {
        type: "value",
        name: "",
        splitLine: {
          show: false,
        },
      }
]

        If there are two Y-axes, you need to add splitLine to both Y-axes

 

 yAxis: [
      {
        type: "value",
        name: "",
        splitLine: {
          show: false,
        },
      },
      {
        type: "value",
        name: "",
        splitLine: {
          show: false,
        },
      }
]