<!doctype html> <html> <head> <title>Line Chart</title> <script src="../dist/Chart.bundle.js"></script> <script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script> <style> canvas { -moz-user-select: none; -webkit-user-select: none; -ms-user-select: none; } </style> </head> <body> <div style="width:75%;"> <canvas id="canvas"></canvas> </div> <br> <br> <button id="randomizeData">Randomize Data</button> <button id="addDataset">Add Dataset</button> <button id="removeDataset">Remove Dataset</button> <button id="addData">Add Data</button> <button id="removeData">Remove Data</button> <script> var MONTHS = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]; var randomScalingFactor = function() { return Math.round(Math.random() * 100 * (Math.random() > 0.5 ? -1 : 1)); }; var randomColorFactor = function() { return Math.round(Math.random() * 255); }; var randomColor = function(opacity) { return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',' + (opacity || '.3') + ')'; }; var config = { type: 'line', data: { labels: ["January", "February", "March", "April", "May", "June", "July"], datasets: [{ label: "My First dataset", data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()], fill: false, borderDash: [5, 5], }, { label: "My Second dataset", data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()], }] }, options: { responsive: true, title:{ display:true, text:"Chart.js Line Chart - Tooltip Hooks" }, tooltips: { mode: 'label', callbacks: { beforeTitle: function() { return '...beforeTitle'; }, afterTitle: function() { return '...afterTitle'; }, beforeBody: function() { return '...beforeBody'; }, afterBody: function() { return '...afterBody'; }, beforeLabel: function() { return '...beforeLabel'; }, afterLabel: function() { return '...afterLabel'; }, beforeFooter: function() { return '...beforeFooter'; }, footer: function() { return 'Footer'; }, afterFooter: function() { return '...afterFooter'; }, } }, hover: { mode: 'label' }, scales: { xAxes: [{ display: true, scaleLabel: { show: true, labelString: 'Month' } }], yAxes: [{ display: true, scaleLabel: { show: true, labelString: 'Value' } }] } } }; $.each(config.data.datasets, function(i, dataset) { dataset.borderColor = randomColor(0.4); dataset.backgroundColor = randomColor(0.5); dataset.pointBorderColor = randomColor(0.7); dataset.pointBackgroundColor = randomColor(0.5); dataset.pointBorderWidth = 1; }); window.onload = function() { var ctx = document.getElementById("canvas").getContext("2d"); window.myLine = new Chart(ctx, config); }; $('#randomizeData').click(function() { $.each(config.data.datasets, function(i, dataset) { dataset.data = dataset.data.map(function() { return randomScalingFactor(); }); }); window.myLine.update(); }); $('#addDataset').click(function() { var newDataset = { label: 'Dataset ' + config.data.datasets.length, borderColor: randomColor(0.4), backgroundColor: randomColor(0.5), pointBorderColor: randomColor(0.7), pointBackgroundColor: randomColor(0.5), pointBorderWidth: 1, data: [], }; for (var index = 0; index < config.data.labels.length; ++index) { newDataset.data.push(randomScalingFactor()); } config.data.datasets.push(newDataset); window.myLine.update(); }); $('#addData').click(function() { if (config.data.datasets.length > 0) { var month = MONTHS[config.data.labels.length % MONTHS.length]; config.data.labels.push(month); $.each(config.data.datasets, function(i, dataset) { dataset.data.push(randomScalingFactor()); }); window.myLine.update(); } }); $('#removeDataset').click(function() { config.data.datasets.splice(0, 1); window.myLine.update(); }); $('#removeData').click(function() { config.data.labels.splice(-1, 1); // remove the label first config.data.datasets.forEach(function(dataset, datasetIndex) { dataset.data.pop(); }); window.myLine.update(); }); </script> </body> </html>