(async function() { const chartData = { datasets: [{ label: 'Wind Speed', data: [{"x":0,"y":46.080000000000005},{"x":-1,"y":41.76},{"x":-2,"y":44.64},{"x":-3,"y":44.64},{"x":-4,"y":45},{"x":-5,"y":16.56},{"x":-6,"y":4.32},{"x":-7,"y":9},{"x":-8,"y":5.760000000000001},{"x":-9,"y":13.68},{"x":-10,"y":13.32},{"x":-11,"y":11.16},{"x":-12,"y":7.920000000000001},{"x":-13,"y":9},{"x":-14,"y":3.24},{"x":-15,"y":3.24},{"x":-16,"y":3.6},{"x":-17,"y":3.24},{"x":-18,"y":3.24},{"x":-19,"y":1.4400000000000002},{"x":-20,"y":6.84},{"x":-21,"y":9.72},{"x":-22,"y":18.720000000000002},{"x":-23,"y":25.2}], backgroundColor: '#0053AA' }] } ctx = document.getElementById('windSpeed').getContext('2d'); chart = new Chart(ctx, { type: 'scatter', data: chartData, showLine: true, options: { scales: { x: { title: { display: true, text: 'Hours', font: { size: 16 }, } }, y: { title: { display: true, text: 'km/hr', font: { size: 16 }, } } } } }) if(chartData.datasets[0].data.length === 0) { const width = chart.width const height = chart.height const chart_ctx = chart.ctx; var fontSize = (height / 114).toFixed(2); chart_ctx.font = fontSize + "em sans-serif"; chart_ctx.fillStyle = "red"; chart_ctx.textBaseline = "middle"; var text = 'No Data', textX = Math.round((width - ctx.measureText(text).width) / 2), textY = height / 2; ctx.fillText(text, textX, textY); } })();