I am creating a bo chart with Chart.JS and it is a bar/line bo. The labels for dataset[0] I want to show with a % sign and the labels for dataset[1] I want to show with a $ sign. Now when I refer to labels I mean what displays when you hover over the bar/line and it displays the info. I attempted the below syntax, but this will not even have a chart display (I altered my code to add an if statement to try to account for dataset[0] & dataset[1])
What would be the proper way to have dataset[0] show a % sign and dataset[1] show a $ sign?
var labelsarr = ["Red 12", "Red 13", "Yellow 12", "Yellow 13", "Blue 12", "Blue 13"],
;
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: labelsarr,
datasets: [{
type: 'line',
fill: false,
label: 'Percent',
backgroundColor: 'rgba(255,0,0,1)',
borderColor: 'rgba(255,0,0,1)',
data: [3, 4, 10, 5, 8, 7],
}, {}
data: [12, 19, 3, 5, 2, 3],
label: 'Total Revenue',
backgroundColor: 'rgba(0, 129, 214, 0.8)',
}]
},
options: {
tooltips: {
callbacks: {
if (chart.data.datasets = [1]) {
label: function(t, d) {
var xLabel = d.datasets[t.datasetIndex].label;
var yLabel = t.yLabel >= 1000 ? '$' + t.yLabel.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",") : '$' + t.yLabel;
return xLabel + ': ' + yLabel;
}
}
if (chart.data.datasets = [0]) {
label: function(value) {
return value + "%"
}
}
}
}
},
legend: {
display: false,
position: 'top',
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true,
callback: function(value, index, values) {
if (parseInt(value) >= 1000) {
return '$' + value.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
} else {
return '$' + value;
}
}
}
}]
}
},
plugins: [{
beforeDraw: function(chart) {
var labels = chart.data.labels;
labels.forEach(function(e, i) {
var bar = chart.data.datasets[1]._meta[0].data[i]._model;
var dataPoint = e.split(/\s/)[1];
if (dataPoint === '12')
bar.backgroundColor = 'blue';
else if (dataPoint === '13')
bar.backgroundColor = 'orange';
});
}
}]
});
I am creating a bo chart with Chart.JS and it is a bar/line bo. The labels for dataset[0] I want to show with a % sign and the labels for dataset[1] I want to show with a $ sign. Now when I refer to labels I mean what displays when you hover over the bar/line and it displays the info. I attempted the below syntax, but this will not even have a chart display (I altered my code to add an if statement to try to account for dataset[0] & dataset[1])
What would be the proper way to have dataset[0] show a % sign and dataset[1] show a $ sign?
var labelsarr = ["Red 12", "Red 13", "Yellow 12", "Yellow 13", "Blue 12", "Blue 13"],
;
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: labelsarr,
datasets: [{
type: 'line',
fill: false,
label: 'Percent',
backgroundColor: 'rgba(255,0,0,1)',
borderColor: 'rgba(255,0,0,1)',
data: [3, 4, 10, 5, 8, 7],
}, {}
data: [12, 19, 3, 5, 2, 3],
label: 'Total Revenue',
backgroundColor: 'rgba(0, 129, 214, 0.8)',
}]
},
options: {
tooltips: {
callbacks: {
if (chart.data.datasets = [1]) {
label: function(t, d) {
var xLabel = d.datasets[t.datasetIndex].label;
var yLabel = t.yLabel >= 1000 ? '$' + t.yLabel.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",") : '$' + t.yLabel;
return xLabel + ': ' + yLabel;
}
}
if (chart.data.datasets = [0]) {
label: function(value) {
return value + "%"
}
}
}
}
},
legend: {
display: false,
position: 'top',
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true,
callback: function(value, index, values) {
if (parseInt(value) >= 1000) {
return '$' + value.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
} else {
return '$' + value;
}
}
}
}]
}
},
plugins: [{
beforeDraw: function(chart) {
var labels = chart.data.labels;
labels.forEach(function(e, i) {
var bar = chart.data.datasets[1]._meta[0].data[i]._model;
var dataPoint = e.split(/\s/)[1];
if (dataPoint === '12')
bar.backgroundColor = 'blue';
else if (dataPoint === '13')
bar.backgroundColor = 'orange';
});
}
}]
});
1 Answer
Reset to default 2Use the following tooltips callback function :
callbacks: {
label: function(t, d) {
if (t.datasetIndex === 0) {
var xLabel = d.datasets[t.datasetIndex].label;
var yLabel = t.yLabel + '%';
return xLabel + ': ' + yLabel;
} else if (t.datasetIndex === 1) {
var xLabel = d.datasets[t.datasetIndex].label;
var yLabel = t.yLabel >= 1000 ? '$' + t.yLabel.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",") : '$' + t.yLabel;
return xLabel + ': ' + yLabel;
}
}
}
ᴡᴏʀᴋɪɴɢ ᴇxᴀᴍᴘʟᴇ
var labelsarr = ["Red 12", "Red 13", "Yellow 12", "Yellow 13", "Blue 12", "Blue 13"];
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: labelsarr,
datasets: [{
type: 'line',
fill: false,
label: 'Percent',
backgroundColor: 'rgba(255,0,0,1)',
borderColor: 'rgba(255,0,0,1)',
data: [3, 4, 10, 5, 8, 7],
}, {
data: [12, 19, 3, 5, 2, 3],
label: 'Total Revenue',
backgroundColor: 'rgba(0, 129, 214, 0.8)',
}]
},
options: {
tooltips: {
callbacks: {
label: function(t, d) {
if (t.datasetIndex === 0) {
var xLabel = d.datasets[t.datasetIndex].label;
var yLabel = t.yLabel + '%';
return xLabel + ': ' + yLabel;
} else if (t.datasetIndex === 1) {
var xLabel = d.datasets[t.datasetIndex].label;
var yLabel = t.yLabel >= 1000 ? '$' + t.yLabel.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",") : '$' + t.yLabel;
return xLabel + ': ' + yLabel;
}
}
}
},
legend: {
display: false,
position: 'top',
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true,
callback: function(value, index, values) {
if (parseInt(value) >= 1000) {
return '$' + value.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
} else {
return '$' + value;
}
}
}
}]
}
},
plugins: [{
beforeDraw: function(chart) {
var labels = chart.data.labels;
labels.forEach(function(e, i) {
var bar = chart.data.datasets[1]._meta[0].data[i]._model;
var dataPoint = e.split(/\s/)[1];
if (dataPoint === '12')
bar.backgroundColor = 'blue';
else if (dataPoint === '13')
bar.backgroundColor = 'orange';
});
}
}]
});<script src="https://cdnjs.cloudflare./ajax/libs/Chart.js/2.6.0/Chart.min.js"></script>
<canvas id="myChart"></canvas>some syntax issues have been fixed, look for those carefully.