I'm using the newest version of chart.js (3.2.1). Padding works if I'm set it to positive values.
But padding 0 (or negative values) doesn't set the line graph exactly at the borders of canvas
options: {
layout: {
padding:0
},
interaction: {
intersect: false,
},
plugins: {
tooltip: {
backgroundColor: 'transparent',
displayColors: false,
bodyFontSize: 14,
titleColor: 'rgba(83,255,228,1)',
callbacks: {
label: function (tooltipItems, data) {
return 'BMI: ' + tooltipItems.raw;
}
}
},
legend: {
display: false,
},
},
elements: {
point: {
radius: 6,
hitRadius: 6,
hoverRadius: 6
}
},
scales: {
xAxes: {
display: false,
},
yAxes: {
display: false,
},
}
}
The padding in the chart config is not for styling of the canvas to other elements, the only thing the padding does is adding the ability of making a bit of space between the canvas edge and the line, from the image you provided it seems like it goes to the end of the canvas and the empty space is another element beneath the canvas.
As you can see in this example, the canvas background is colored gray and with padding: 0 the line touches the end of the canvas as expected
var options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderWidth: 1
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderWidth: 1
}
]
},
options: {
plugins: {
tooltip: {
backgroundColor: 'transparent',
displayColors: false,
bodyFontSize: 14,
titleColor: 'rgba(83,255,228,1)',
callbacks: {
label: function(tooltipItems, data) {
return 'BMI: ' + tooltipItems.raw;
}
}
},
legend: {
display: false,
},
},
interaction: {
intersect: false,
},
layout: {
padding: 0
},
elements: {
point: {
radius: 0
}
},
scales: {
y: {
display: false
},
x: {
display: false
}
}
}
}
var ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
canvas {
background-color: #eee;
}
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.2.0/chart.js" integrity="sha512-opXrgVcTHsEVdBUZqTPlW9S8+99hNbaHmXtAdXXc61OUU6gOII5ku/PzZFqexHXc3hnK8IrJKHo+T7O4GRIJcw==" crossorigin="anonymous"></script>
</body>
Related
I have a chart (chartjs) with labels (datalabels).
When my data changes, my chart updates automatically. However, the largest datalabels are most of the time hidden by the automatic resizing of the y axis. Do you have any idea to fix that ?
It should be a 3 up there :)
Here is my code:
const completionOptions = {
responsive: true,
plugins: {
legend: {
display: false,
},
tooltip: {
backgroundColor: 'rgb(85, 85, 85, 1)',
displayColors: false,
// https://www.chartjs.org/docs/latest/configuration/tooltip.html
},
datalabels: {
color: 'rgb(203, 203, 203)',
anchor: 'end',
align: 'end',
labels: {
title: {
font: {
family: 'karla',
weight: '600',
size: 12,
},
}
}
}
},
scales: {
display: false,
y: {
beginAtZero: true,
display: false,
grid: {
display: false,
},
ticks: {
padding: 10
}
},
x: {
grid: {
display: false,
},
ticks: {
autoSkip: false,
maxRotation: 0,
minRotation: 0,
font: {
size: 20,
}
}
},
}
}
You can use the grace option to add extra space to the y axes:
Chart.register(ChartDataLabels)
const options = {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 20, 3, 5, 2, 3],
backgroundColor: 'pink'
}]
},
options: {
scales: {
y: {
grace: '10%'
}
},
plugins: {
legend: {
display: false
},
datalabels: {
anchor: 'end',
align: 'end'
}
}
}
}
const ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.8.0/chart.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-datalabels/2.0.0/chartjs-plugin-datalabels.js"></script>
</body>
I have this chart, starting at 0 and I want the Y axis to begin at 20. It surprises me how there is nothing related to this in the official ChartJS docs. Is this possible in any way?
I have tried several ways to do it, eg. with ticks or min value and so on but nothing worked.
The application is written in Nuxt3 and the ChartJS library used is vue-chart-3.
const options = computed(() => ({
responsive: true,
plugins: {
legend: {
display: false,
},
title: {
display: false,
}
},
scales: {
x: {
stacked: true,
},
y: {
stacked: true,
}
}
}));
const chartData = computed(() => ({
labels: ['Provider'],
datasets: [
{
data: [selectedDataset.value?.score.uncustomized],
backgroundColor: ['#00b7c4'],
},
{
data: [selectedDataset.value?.score.difference],
backgroundColor: ['#204992'],
},
],
}));
const { barChartProps, barChartRef } = useBarChart({
chartData,
options,
});
Any help would be appreciated.
If you want the axis to start at a given number you need to use the min property:
const options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderColor: 'pink'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'orange'
}
]
},
options: {
scales: {
y: {
min: 6
}
}
}
}
const ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.1/chart.js"></script>
</body>
I am trying to reduce padding and increase title text font size , I went though few example but dont seem to work. Even on placing the parameter at multiple places.
const labels1_1 = ['1','2','3', '4', '5','6','7', '8','9+'];
const data1_1 = {
labels: labels1_1,
datasets: [{
label: 'Trucks',
data: [1,2,3, 4, 5,6,7, 8,9],
backgroundColor: '#4472C4',
borderColor: '#4472C4',
borderWidth: 1
}]
};
const config1_1 = {
type: 'bar',
data: data1_1,
options: {
title:{
padding:5,
fontSize:18
},
plugins: {
title: {
display: true,
text: 'Number of SS vs Number of Trucks',
padding:5,
fontSize:18
},
datalabels: {
align: 'end',
anchor: 'end',
backgroundColor: '#3472C4'
},
},
scales: {
y: {
display:true,
beginAtZero: true,
title: {
display: true,
text: 'SS'
}
},
}
},
};
const myChart1_1 = new Chart(
document.getElementById('myChart1_1'), config1_1);
I went through https://www.chartjs.org/docs/2.8.0/configuration/title.html but didnt help. Also how to mention it globally so all titles have bigger font. text: 'Number of SS vs Number of Trucks' is the title.
The Title options have evolved quite a bit in v2 of Chartjs. I found that the title was hidden entirely until I added padding - for one example
options: {
plugins: {
title: {
display: true,
text: "Title" ,
padding: {
top: 10,
bottom: 10
},
font: {
size: 24,
style: 'italic',
family: 'Helvetica Neue'
}
}
},
... other options here
}
The reason it didn't help is because you are looking at the docs for version 2.8.0 as you can see in the url, the latest version is 3.6.2 and has some breaking changes against v2.
To adjust the font propertys you will need to define them in the font object in the title config like so:
const options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderColor: 'pink'
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'orange'
}
]
},
options: {
plugins: {
title: {
display: true,
text: 'Number of SS vs Number of Trucks',
font: {
size: 30
}
}
}
}
}
const ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.6.2/chart.js"></script>
</body>
latest V3 documentation: https://www.chartjs.org/docs/latest/
I'm using Chart.JS with chartjs-plugin-annotation for drawing base line in chart bar. And I wanna hide it ( this red line) when hide first data set.
let data1 = {
labels: charts['str-err'].labels,
datasets: [{
label: 'Strength',
data: charts['str-err'].data,
backgroundColor: ['rgba(0,102,204,0.5)']
},{
label: 'Avg data, %',
data: p_model,
backgroundColor: ['rgba(0,102,204,0.6)']
}]
};
let options = {
scales: {
x: {
grid: {
drawBorder: false,
display: false,
}
},
y: {
grid: {
drawBorder: false,
display: true,
drawOnChartArea: true,
drawTicks: false,
borderDash: [5, 5]
}
}
},
plugins: {
legend:{align: 'start'},
annotation: {
annotations: {
line1: {
type: 'line',
yMin: avg_err,
yMax: avg_err,
borderColor: 'rgba(234,6,6,0.7)',
borderWidth: 1,
borderDash: [2,2],
display: true
}
}
}
},
};
I wanna hide line1 when 'Strength' dataset was hidden, and turn it back when show 'Strength' chart bar. I know how to hide line1 but can't understand how to catch event that dataset was hidden
let displayAnnotation = function(chart, d){
chart.options.plugins.annotation.annotations.line1.display = d;
chart.update();
};
Thx
You can make use of the legend onClick handler like so:
const defaultLegendClickHandler = Chart.defaults.plugins.legend.onClick;
const pieDoughnutLegendClickHandler = Chart.controllers.doughnut.overrides.plugins.legend.onClick;
const options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: 'Strength',
data: [12, 19, 3, 5, 2, 3],
borderColor: 'pink'
},
{
label: 'Avg data, %',
data: [7, 11, 5, 8, 3, 7],
borderColor: 'orange'
}
]
},
options: {
plugins: {
legend: {
onClick: (evt, legendItem, legend) => {
const type = legend.chart.config.type;
if (type === 'pie' || type === 'doughnut') {
pieDoughnutLegendClickHandler(evt, legendItem, legend)
} else {
defaultLegendClickHandler(evt, legendItem, legend);
}
if (legendItem.text !== 'Strength') {
return;
}
legend.chart.options.plugins.annotation.annotations.line1.display = !legend.chart.getDatasetMeta(0).hidden;
legend.chart.update();
}
},
annotation: {
annotations: {
line1: {
type: 'line',
yMin: 4,
yMax: 6,
borderColor: 'rgba(234,6,6,0.7)',
borderWidth: 1,
borderDash: [2, 2],
display: true
}
}
}
}
}
}
const ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.1/chart.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-annotation/1.0.2/chartjs-plugin-annotation.js"></script>
</body>
I would like to increase the size of the following elements. Could you please edit the code below to make these elements bigger:
the label text size (the NaCl and SalinityDrift boxes above the
chart)
the numbers themselves in x,y,y2 axes
Script:
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.1/chart.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.30.1/date_fns.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-date-fns/dist/chartjs-adapter-date-fns.bundle.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/hammer.js/2.0.8/hammer.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-zoom/1.1.1/chartjs-plugin-zoom.min.js"></script>
<canvas id="myChart"></canvas>
<script type="text/javascript">
$("#myChart").width( $(window).width() *0.97 );
$("#myChart").height( $(window).height() * 0.8 );
var ctx = document.getElementById('myChart').getContext('2d');
const options = {
type: 'line',
data: {
datasets: [
{
label: 'NaCl',
data: natriumChrolideData,
borderColor: 'blue',
yAxisID: 'y',
},
{
label: 'Salinity drift',
data: salinityDriftData,
borderColor: 'red',
yAxisID: 'y2',
},
]
},
options: {
parsing: false,
normalized: true,
animation: false,
responsive: false,
scales: {
x: {
type: 'time',
title: {
display: true,
text: 'Time (client time zone)',
font: {
size: 24
}
},
},
y: {
title: {
display: true,
text: 'NaCl storage, kg',
font: {
size: 24
}
}
},
y2: {
title: {
display: true,
text: 'Salinity drift, %',
font: {
size: 24
},
ticks: {
min: 0,
},
}
},
},
plugins: {
zoom: {
pan: {
enabled: true,
onPanStart({chart, point}) {
// alert("pan works!");
},
mode: 'x',
},
zoom: {
wheel: {
enabled: true,
},
pinch: {
enabled: true
},
mode: 'x',
}
}
},
}
}
new Chart(ctx, options);
</script>
Produced plot example:
Note: I found some solutions to use fontSize or tick.font or tick.fontSize, but either I implemented them wrongly or they do not work for some reason.
You are putting the ticks config in the scale title while its supposed to be on the root of the scale itself. Also for the boxes font size on top you need to configure it in the options.plugins.legend.labels namespace.
Live example:
var options = {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderWidth: 1
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderWidth: 1
}
]
},
options: {
plugins: {
legend: {
labels: {
font: {
size: 20
}
}
}
},
scales: {
x: {
ticks: {
font: {
size: 20
}
}
},
y: {
ticks: {
font: {
size: 20
}
}
}
}
}
}
var ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.1/chart.js"></script>
</body>