Open hrmj008 opened 4 months ago
just want to change point coler when hover line, where to implement onhover function
following is my code
const line_chart = new Chart(ctx, { type: 'line', data: data2, options: { interaction: { mode: 'point' }, onHover: (_, elements) => { line_chart.data.datasets[0].pointBackgroundColor = 'red' line_chart.update() }, responsive: true, maintainAspectRatio: false, plugins: { legend: { // position: 'top', display: false, }, title: { display: false, }, tooltip: { // Disable the on-canvas tooltip enabled: false, external: function(context) { // line_chart.data.datasets[0].pointBackgroundColor = 'red' // Tooltip Element let tooltipEl = document.getElementById('dashboard_chart_tooltip'); tooltipEl.style.display = 'flex'; const tooltipModel = context.tooltip; if (tooltipModel.opacity === 0) { tooltipEl.style.display = 'none'; // line_chart.data.datasets[0].pointBackgroundColor = 'transparent' // line_chart.update() return; } const position = context.chart.canvas.getBoundingClientRect(); const bodyFont = Chart.helpers.toFont(tooltipModel.options.bodyFont); // let data = fake_data.daily.find(item => item.label == tooltipModel.title[0]) document.getElementById('dashboard_chart_tooltip_item_title').innerHTML = 1 document.getElementById('dashboard_chart_tooltip_item_alert_data').innerHTML = 2 document.getElementById('dashboard_chart_tooltip_item_feedback_data').innerHTML = 3 document.getElementById('dashboard_chart_tooltip_item_feedback_in_time_data').innerHTML = 4 // Display, position, and set styles for font tooltipEl.style.opacity = 1; tooltipEl.style.position = 'absolute'; tooltipEl.style.left = position.left + window.pageXOffset + tooltipModel.caretX + 'px'; tooltipEl.style.top = position.top + window.pageYOffset + tooltipModel.caretY + 'px'; tooltipEl.style.font = bodyFont.string; tooltipEl.style.padding = tooltipModel.padding + 'px ' + tooltipModel.padding + 'px'; tooltipEl.style.pointerEvents = 'none'; tooltipEl.style.marginLeft = '20px'; // line_chart.update() } } }, scales: { x: { display: false, }, y: { display: false } } }, });
but on hover function trigger when mouse reach canvas (not line)
need code example
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just want to change point coler when hover line, where to implement onhover function
following is my code
but on hover function trigger when mouse reach canvas (not line)
Your Proposal for Changes
need code example
Example
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