We Keep Coding

How to remove all gridlines, border and show only ticks on a chartjs horizontal bar chart

Following on from the answer in this post
I have the following chart which can also be found here
const d0 = new Date("2023-02-15T00:00:00.721Z").getTime()
const d1 = new Date("2023-02-15T01:00:00.721Z").getTime()
const d2 = new Date("2023-02-15T02:30:00.721Z").getTime()
const d3 = new Date("2023-02-15T03:20:00.721Z").getTime()
const d4 = new Date("2023-02-15T05:05:00.721Z").getTime()
let values = [d0, d1, d2, d3, d4];
let data = {
labels: [''],
datasets: [{
label: 'up',
axis: 'y',
data: [d1],
backgroundColor: 'red',
},{
label: 'down',
axis: 'y',
data: [d2],
backgroundColor: 'yellow',
},{
label: 'out',
axis: 'y',
data: [d3],
backgroundColor: 'green',
},{
label: 'up',
axis: 'y',
data: [d4],
backgroundColor: 'red',
}
]
};
const config = {
data,
type: 'bar',
options:{
elements: {
bar: {
borderWidth: 0
}
},
ticks: {
display: true
},
interaction: {
mode: 'dataset'
},
tooltip: {
mode: 'dataset'
},
hover: {
mode: 'dataset'
},
onClick: function (e) {
// debugger;
var activePointLabel =
this.getElementsAtEventForMode(e, 'dataset', { intersect: true }, false)
alert(activePointLabel[0].datasetIndex);
}
,
plugins: {
legend: {
display: false,
},
title: {
display: false,
},
},
indexAxis: 'y',
responsive: true,
maintainAspectRatio: false,
scales: {
x: {
grid: {
display: true
},
min: d0,
ticks: {
callback: function(value, index, ticks) {
return moment(value).format('HH:mm');
}
},
// afterBuildTicks: axis => axis.ticks = values.map(v => ({ value: v }))
},
y: {
grid: {
display: false
},
stacked: true
},
}
}};
new Chart(document.getElementById("chart"), config);
This produces this...
]1
I would like to get rid of all the grids lines , except the ticks, but if I set the gird displays false the tick also disappear, and it also leave a border around the chart, etg something like
Is there a way to do this?

Just add border: {display: false}, to the scales configuration. (here is the link to the documentation)
...
scales: {
x: {
border: {
display: false,
},
...
},
...
}
...
Update added full running example:
const d0 = moment.duration('07:00:00').asMinutes();
const d1 = moment.duration('09:00:00').asMinutes();
const d2 = moment.duration('10:45:00').asMinutes();
const d3 = moment.duration('17:35:00').asMinutes();
const d4 = moment.duration('19:00:00').asMinutes();
let values = [d0, d1, d2, d3, d4];
let data = {
labels: [''],
datasets: [{
label: 'up',
axis: 'y',
data: [d1],
backgroundColor: 'red',
},{
label: 'down',
axis: 'y',
data: [d2],
backgroundColor: 'yellow',
},{
label: 'out',
axis: 'y',
data: [d3],
backgroundColor: 'green',
},{
label: 'up',
axis: 'y',
data: [d4],
backgroundColor: 'red',
}
]
};
const config = {
data,
type: 'bar',
options:{
plugins: {
tooltip: {
mode: 'dataset',
callbacks: {
label: function(item){
return moment().startOf('day').add({ minute: item.raw}).format('HH:mm');
}
}
},
legend: {
display: false,
},
title: {
display: false,
},
},
indexAxis: 'y',
responsive: true,
maintainAspectRatio: false,
scales: {
x: {
min: d0,
border: { display: false },
ticks: {
callback: function(value, index, ticks) {
return moment().startOf('day').add({ minute: value}).format('HH:mm');
}
},
afterBuildTicks: axis => axis.ticks = values.map(v => ({ value: v }))
},
y: {
stacked: true,
grid: { display: false },
},
}
}};
new Chart(document.getElementById("chart"), config);
<script src="//cdn.jsdelivr.net/npm/chart.js"></script>
<script src="//cdn.jsdelivr.net/npm/moment#^2"></script>
<script src="//cdn.jsdelivr.net/npm/chartjs-adapter-moment#^1"></script>
<div class="chart" style="height:84px; width:350px;">
<canvas id="chart" ></canvas>
</div>

use tickColor (see below config) for v 3.8.2
scales: {
x: {
...
grid: {
display: true,
drawTicks: true, //show ticks
borderColor: "transparent", //horizontal line color above ticks (x-axis)
color: "transparent", //grid lines color
tickColor: "#868e96" //ticks color (little line above points)
},
},
...
}

Chart JS Tooltip Currency Problem - Stacked Bar Chart

I use ChatJS and i want to add an € Symbol after every number in the Tooltip.
On my most charts it works perfectly but the Stacked Bar Chart makes me problems.
Here is an example Code like mine (Just a basic Example)
var barChart = new Chart(ctx_barChart, {
type: 'bar',
data: {
labels: ["Fruits"],
datasets: [{
label: [
["Apple"]
],
data: [12],
backgroundColor: 'blue',
barThickness: 80,
},
{
label: ["Banana"],
data: [15],
backgroundColor: 'red',
barThickness: 80,
},
]
},
options: {
maintainAspectRatio: false,
indexAxis: 'y',
responsive: true,
scales: {
x: {
stacked: true,
display: false,
},
y: {
stacked: true,
display: false,
mirror: true,
}
},
plugins: {
tooltip: {
callbacks: {
label: function(context) {
let label = context.dataset.label || '';
if (label) {
label += ': ';
}
if (context.parsed.y !== null) {
label += new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'EUR'
}).format(context.parsed.y);
}
return label;
}
}
},
legend: {
display: false
},
title: {
display: false,
},
},
},
});
The tooltips both show 0,00$, but not my Values 12 and 15. Anyone have an suggestiont?

You should use context.parsed.x instead of context.parsed.y since it's a horizontal bar chart.
Please take a look at your amended code and see how it works.
new Chart('barChart', {
type: 'bar',
data: {
labels: ["Fruits"],
datasets: [{
label: "Apple",
data: [12],
backgroundColor: 'blue',
barThickness: 80,
},
{
label: "Banana",
data: [15],
backgroundColor: 'red',
barThickness: 80,
},
]
},
options: {
maintainAspectRatio: false,
indexAxis: 'y',
responsive: true,
scales: {
x: {
stacked: true,
display: false,
},
y: {
stacked: true,
display: false,
mirror: true,
}
},
plugins: {
tooltip: {
callbacks: {
label: ctx => ctx.dataset.label + ': ' + new Intl.NumberFormat('de-DE', { style: 'currency', currency: 'EUR' }).format(ctx.parsed.x)
}
},
legend: {
display: false
},
title: {
display: false,
},
},
},
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.7.1/chart.min.js"></script>
<canvas id="barChart" height="100"></canvas>

How do I create a legend for a bar chart?

How do I create legends like the following:
So far I have the following:
I can't figure out how to specify labels for the legend. They don't provide examples either.
https://www.chartjs.org/docs/latest/configuration/legend.html
So far I have the following code:
var topClickSourcesChart = new Chart('dashboard-click-source-chart', {
type: 'bar',
data: {
labels: ["Facebook","Google","NONE",],
datasets: [{
data: [10,5,3,],
backgroundColor: ['#4D90C3', '#866DB2', '#EA6F98', '#61BDF6', '#768BB7'],
}],
},
options: {
scales: {
xAxes: [{
display: false,
}]
},
legend: {
position: 'right',
labels: {
boxWidth: 10,
}
}
}
});

To show a legend you need to set the label property of a dataset, so the type of output you are expecting can be built by creating a chart from the code as shown below. Fiddle -> https://jsfiddle.net/6nkcx8sq/
var topClickSourcesChart = new Chart('dashboard-click-source-chart', {
type: 'bar',
data: {
labels: ["Number of users"],
datasets: [{
label: 'Facebook',
data: [10],
backgroundColor: '#4D90C3',
},
{
label: 'Instagram',
data: [15],
backgroundColor: '#866DB2',
},
{
label: 'Twitter',
data: [7],
backgroundColor: '#EA6F98',
}],
},
options: {
scales: {
xAxes: [{
display: false,
}],
yAxes: [{
ticks: {
beginAtZero: true
}
}]
},
legend: {
position: 'right',
labels: {
boxWidth: 10,
}
}
}
});

I was able to get it with the following, but it was a pain in the ass for loops due to the backgroundColor having to be inside the dataset.
var topClickSourceChart = new Chart('dashboard-click-source-chart', {
type: 'bar',
data: {
labels: ["Facebook","Google","NONE",],
datasets: [
{label: "Facebook", data: [10]},{label: "Google", data: [5]},{label: "NONE", data: [3]},
]
},
options: {
scales: {
xAxes: [{
display: false,
}],
yAxes: [{
ticks: {
beginAtZero: true,
}
}]
},
legend: {
position: 'right',
labels: {
boxWidth: 10,
}
}
}
});
if (topClickSourceChart.data.datasets.length > 0) topClickSourceChart.data.datasets[0].backgroundColor = '#4D90C3';
if (topClickSourceChart.data.datasets.length > 1) topClickSourceChart.data.datasets[1].backgroundColor = '#866DB2';
if (topClickSourceChart.data.datasets.length > 2) topClickSourceChart.data.datasets[2].backgroundColor = '#EA6F98';
if (topClickSourceChart.data.datasets.length > 3) topClickSourceChart.data.datasets[3].backgroundColor = '#61BDF6';
if (topClickSourceChart.data.datasets.length > 4) topClickSourceChart.data.datasets[4].backgroundColor = '#768BB7';
Here is the JSP/JSTL loop:
data: {
labels: [<c:forEach items="${clickSources}" var="cs">"${cs.key}",</c:forEach>],
datasets: [
<c:forEach items="${clickSources}" var="cs">{label: "${cs.key}", data: [${cs.value}]},</c:forEach>
]
},
I still could not find a way to make the top of the bars rounded.

how to change the Y-axis values from float number to integer in chartjs?

i want to change Yaxis from real number to integer and here is image, and please help me solve this problem
here is my code
var lineChartData = {
labels: time,
datasets: [{
label: "Số người đăng kí ủng hộ",
borderColor: window.chartColors.red,
pointBackgroundColor: window.chartColors.red,
fill: false,
data: people_isProcessing
}, {
label: "Số người đã ủng hộ",
borderColor: window.chartColors.purple,
pointBackgroundColor: window.chartColors.purple,
fill: false,
data: people_isReceived
}]
};
and here is my option for my chart
window.onload = function() {
var chartEl = document.getElementById("chart");
window.myLine = new Chart(chartEl, {
type: 'line',
data: lineChartData,
options: {
title: {
display: true,
text: 'Kindmate - Chart Static Donate'
},
tooltips: {
enabled: true,
mode: 'index',
position: 'nearest',
custom: customTooltips
}
}
});
});

In your case, you can set stepSize property to 1 for y-axis ticks, to change the y-axis values from float number to integer.
options: {
scales: {
yAxes: [{
ticks: {
stepSize: 1
}
}]
},
...
}
ᴅᴇᴍᴏ
var chart = new Chart(ctx, {
type: 'line',
data: {
labels: ['Jan', 'Feb', 'Mar', 'Apr'],
datasets: [{
label: '# of votes',
data: [1, 2, 3, 4]
}]
},
options: {
scales: {
yAxes: [{
ticks: {
stepSize: 1
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js"></script>
<canvas id="ctx"></canvas>

Try this:
window.onload = function() {
var chartEl = document.getElementById("chart");
window.myLine = new Chart(chartEl, {
type: 'line',
data: lineChartData,
options: {
title:{
display:true,
text:'Kindmate - Chart Static Donate'
},
tooltips: {
enabled: true,
mode: 'index',
position: 'nearest',
custom: customTooltips
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true,
callback: function(value) {if (value % 1 === 0) {return value;}}
}
}]
}
}
});

chartjs: How to remove specific label

I have a Bar Chart with these data and options:
var data = {
labels: periodnames,
datasets: [
{
yAxisID: "bar-stacked",
data: rcash,
backgroundColor: "#FFCE56",
label:""
},
{
yAxisID:"bar-stacked",
data: pcash,
backgroundColor: "#FFCE56",
label: "cash"
}
]
};
var options = {
animation: {
animateScale: true
},
scales: {
xAxes: [{
stacked: true,
}],
yAxes: [
{
display:false,
id: "line-axis",
},
{
id: "bar-stacked",
stacked: true,
}
]
}
}
finactivityGraphChart = new Chart(ctx, {
type: 'bar',
data: data,
options: options
});
The result chart is this:
My problem is that I don't want to show the first dataset's label. If I don't define it, it shows the yellow box with the value "undefine" next to it. I suppose that I must modify the Chart.js file. Any suggestions?

This could be achieved, using the filter function of legend­*'s* label.
see Legend Label Configuration
In short, add the following in your chart options ...
legend: {
labels: {
filter: function(label) {
if (label.text === 'cash') return true;
}
}
},
ᴅᴇᴍᴏ
var ctx = document.querySelector('#c').getContext('2d');
var data = {
labels: ['Jan', 'Feb', 'Mar'],
datasets: [{
yAxisID: "bar-stacked",
data: [1, 2, 3],
backgroundColor: "#FFCE56",
label: "gold"
}, {
yAxisID: "bar-stacked",
data: [-1, -2, -3],
backgroundColor: "#FFCE56",
label: "cash"
}]
};
var options = {
legend: {
labels: {
filter: function(label) {
if (label.text === 'cash') return true; //only show when the label is cash
}
}
},
animation: {
animateScale: true
},
scales: {
xAxes: [{
stacked: true,
}],
yAxes: [{
display: false,
id: "line-axis",
}, {
id: "bar-stacked",
stacked: true,
}]
}
}
finactivityGraphChart = new Chart(ctx, {
type: 'bar',
data: data,
options: options
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.js"></script>
<canvas id="c"></canvas>