I've been experimenting with a bar graph in Chart.js, and I'm attempting to implement custom tooltips. After doing some research, it appears that adding
tooltipTemplate: "<%= value %>% test"
to my options section should append the word 'test' after the data value in the tooltip. Despite following this advice, my tooltip remains unaltered. Any suggestions on how to resolve this?
Appreciate any help!
Below is a demonstration showcasing a customized tooltip label:
https://i.sstatic.net/dSkaw.png
let context = document.getElementById("myChart");
let chartData = {
labels: ["Jan/16", "Feb/16", "Mar/16", "Abr/16", "May/16", "Jun/16", "Jul/16"],
datasets: [{
type: 'bar',
label: "Revenue (US$)",
data: [4000, 4850, 5900, 6210, 2500, 4000, 6500],
backgroundColor: 'rgba(0, 0, 255, 0.3)'
}]
};
let myCustomChart = new Chart(context,
{
type: 'bar',
data: chartData,
options: {
responsive: true,
tooltips: {
callbacks: { // CUSTOMIZING THE LABELS
title: function() {
return '***** My customized label title *****';
},
beforeLabel: function(tooltipItem, data) {
return 'Month: ' + tooltipItem.xLabel;
},
label: function(tooltipItem, data) {
return data.datasets[tooltipItem.datasetIndex].label + ': ' + tooltipItem.yLabel;
},
afterLabel: function(tooltipItem, data) {
return '***** Test *****';
},
}
},
scales: {
xAxes: [{
display: true,
labels: {
show: true,
}
}],
yAxes: [{
type: "linear",
display: true,
position: "left",
labels: { show: true },
ticks: {
beginAtZero: true
}
}]
}
}
});
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