Chart.js v2 - hiding grid lines

If you want them gone by default, you can set:

Chart.defaults.scale.gridLines.display = false;

From version 3.x, onwards use this syntax. Refer to chart.js migration guide: https://www.chartjs.org/docs/latest/getting-started/v3-migration.html

scales: {
  x: {
    grid: {
      display: false
    }
  },
  y: {
    grid: {
      display: false
    }
  }
}

I found a solution that works for hiding the grid lines in a Line chart.

Set the gridLines color to be the same as the div's background color.

var options = {
    scales: {
        xAxes: [{
            gridLines: {
                color: "rgba(0, 0, 0, 0)",
            }
        }],
        yAxes: [{
            gridLines: {
                color: "rgba(0, 0, 0, 0)",
            }   
        }]
    }
}

or use

var options = {
    scales: {
        xAxes: [{
            gridLines: {
                display:false
            }
        }],
        yAxes: [{
            gridLines: {
                display:false
            }   
        }]
    }
}

options: {
    scales: {
        xAxes: [{
            gridLines: {
                drawOnChartArea: false
            }
        }],
        yAxes: [{
            gridLines: {
                drawOnChartArea: false
            }
        }]
    }
}