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- <!doctype html>
- <html>
- <head>
- <title>Tooltip Hooks</title>
- <script src="../../dist/Chart.min.js"></script>
- <script src="../utils.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>
- <script>
- var config = {
- type: 'line',
- data: {
- labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
- datasets: [{
- label: 'My First dataset',
- borderColor: window.chartColors.red,
- backgroundColor: window.chartColors.red,
- data: [
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor()
- ],
- fill: false,
- }, {
- label: 'My Second dataset',
- borderColor: window.chartColors.blue,
- backgroundColor: window.chartColors.blue,
- data: [
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor(),
- randomScalingFactor()
- ],
- fill: false,
- }]
- },
- options: {
- responsive: true,
- title: {
- display: true,
- text: 'Chart.js Line Chart - Custom Information in Tooltip'
- },
- tooltips: {
- mode: 'index',
- callbacks: {
- // Use the footer callback to display the sum of the items showing in the tooltip
- footer: function(tooltipItems, data) {
- var sum = 0;
- tooltipItems.forEach(function(tooltipItem) {
- sum += data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
- });
- return 'Sum: ' + sum;
- },
- },
- footerFontStyle: 'normal'
- },
- hover: {
- mode: 'index',
- intersect: true
- },
- scales: {
- xAxes: [{
- display: true,
- scaleLabel: {
- show: true,
- labelString: 'Month'
- }
- }],
- yAxes: [{
- display: true,
- scaleLabel: {
- show: true,
- labelString: 'Value'
- }
- }]
- }
- }
- };
- window.onload = function() {
- var ctx = document.getElementById('canvas').getContext('2d');
- window.myLine = new Chart(ctx, config);
- };
- </script>
- </body>
- </html>
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