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<!doctype html> <html> <head> <title>Line Chart with Custom Tooltips</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; } #chartjs-tooltip { opacity: 1; position: absolute; background: rgba(0, 0, 0, .7); color: white; border-radius: 3px; -webkit-transition: all .1s ease; transition: all .1s ease; pointer-events: none; -webkit-transform: translate(-50%, 0); transform: translate(-50%, 0); } .chartjs-tooltip-key { display: inline-block; width: 10px; height: 10px; margin-right: 10px; } </style> </head> <body> <div id="canvas-holder1" style="width:75%;"> <canvas id="chart"></canvas> </div> <script> Chart.defaults.global.pointHitDetectionRadius = 1; var customTooltips = function(tooltip) { // Tooltip Element var tooltipEl = document.getElementById('chartjs-tooltip'); if (!tooltipEl) { tooltipEl = document.createElement('div'); tooltipEl.id = 'chartjs-tooltip'; tooltipEl.innerHTML = '<table></table>'; this._chart.canvas.parentNode.appendChild(tooltipEl); } // Hide if no tooltip if (tooltip.opacity === 0) { tooltipEl.style.opacity = 0; return; } // Set caret Position tooltipEl.classList.remove('above', 'below', 'no-transform'); if (tooltip.yAlign) { tooltipEl.classList.add(tooltip.yAlign); } else { tooltipEl.classList.add('no-transform'); } function getBody(bodyItem) { return bodyItem.lines; } // Set Text if (tooltip.body) { var titleLines = tooltip.title || []; var bodyLines = tooltip.body.map(getBody); var innerHtml = '<thead>'; titleLines.forEach(function(title) { innerHtml += '<tr><th>' + title + '</th></tr>'; }); innerHtml += '</thead><tbody>'; bodyLines.forEach(function(body, i) { var colors = tooltip.labelColors[i]; var style = 'background:' + colors.backgroundColor; style += '; border-color:' + colors.borderColor; style += '; border-width: 2px'; var span = '<span class="chartjs-tooltip-key" style="' + style + '"></span>'; innerHtml += '<tr><td>' + span + body + '</td></tr>'; }); innerHtml += '</tbody>'; var tableRoot = tooltipEl.querySelector('table'); tableRoot.innerHTML = innerHtml; } var positionY = this._chart.canvas.offsetTop; var positionX = this._chart.canvas.offsetLeft; // Display, position, and set styles for font tooltipEl.style.opacity = 1; tooltipEl.style.left = positionX + tooltip.caretX + 'px'; tooltipEl.style.top = positionY + tooltip.caretY + 'px'; tooltipEl.style.fontFamily = tooltip._bodyFontFamily; tooltipEl.style.fontSize = tooltip.bodyFontSize + 'px'; tooltipEl.style.fontStyle = tooltip._bodyFontStyle; tooltipEl.style.padding = tooltip.yPadding + 'px ' + tooltip.xPadding + 'px'; }; var lineChartData = { labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'], datasets: [{ label: 'My First dataset', borderColor: window.chartColors.red, pointBackgroundColor: window.chartColors.red, fill: false, data: [ randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor() ] }, { label: 'My Second dataset', borderColor: window.chartColors.blue, pointBackgroundColor: window.chartColors.blue, fill: false, data: [ randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor() ] }] }; window.onload = function() { var chartEl = document.getElementById('chart'); window.myLine = new Chart(chartEl, { type: 'line', data: lineChartData, options: { title: { display: true, text: 'Chart.js Line Chart - Custom Tooltips' }, tooltips: { enabled: false, mode: 'index', position: 'nearest', custom: customTooltips } } }); }; </script> </body> </html>