Develop Reference

Add an feature DateOfTheDay in my Chart.js

I looked for a lot of things to add a feature to my chart but
I couldn't find it in the documentation or here,
I would like to add a visual addition of today's date, on the bottom legend for example,
does anyone have any examples or ideas? thank you in advance
new Chart(canvas, {
type: 'line',
data: {
labels: [ <?php echo $txt_labels; ?> ],
datasets: [{
label: 'Réelle',
yAxisID: 'A',
data: [ <?php echo $txt_series1; ?> ],
borderColor: 'rgba(238, 121, 83, 1)',
backgroundColor: 'rgba(0, 0, 0, 0)',
pointBackgroundColor: "rgba(238, 121, 83, 1)",
pointRadius: 5,
}, {
label: 'Attendue',
yAxisID: 'B',
data: [ <?php echo $txt_series2; ?> ],
borderColor: 'rgba(167, 172, 200, 1)',
backgroundColor: 'rgba(0, 0, 0, 0)',
pointBackgroundColor: "rgba(167, 172, 200, 1)",
pointRadius: 5,
}]
},
options: {
animation: {
animateScale: true,
animateRotate: true,
duration: 1500,
easing: 'easeInOutSine',
},
scales: {
x:{
grid: {
borderColor: 'rgba(16, 16, 18, 0.5)',
offset: true,
},
},
A: {
type: 'linear',
position: 'left',
grid: {
display: false,
borderColor: 'rgba(16, 16, 18, 0.5)',
},
ticks: {
font: {
size: 14,
},
callback: function(value, index, values) {
return value.toString().replace(/\B(?=(\d{3})+(?!\d))/g, " ");
}
},
},
B: {
type: 'linear',
position: 'right',
}
},
},
},
}
});

How to draw comparison of two mixed bar charts in chart.js?

So, i have this graphic by chart.js: http://jsfiddle.net/wdxk1nsb/1/
there is no problems, but now i want to compare this bars like this: http://jsfiddle.net/kyo3bqzh/
or here:
var data = {
labels: ["1_jan", "2_jan", "3_jan"],
datasets: [
{
type: 'bar',
label: 'fees',
data: [-5,-5,-6],
backgroundColor: 'yellow',
borderColor: 'black',
fill: false,
pointRadius: 6,
pointHoverRadius: 6,
bezierCurve: false,
stack: 1
},
{
type: 'bar',
label: 'net revenue',
data: [20,32,20],
backgroundColor: 'pink',
borderColor: 'black',
fill: false,
pointRadius: 6,
pointHoverRadius: 6,
bezierCurve: false,
order: 1,
stack: 1
},
{
type: 'line',
label: 'net revenue',
data: [20,32,20],
backgroundColor: 'pink',
borderColor: 'black',
fill: false,
pointRadius: 8,
pointHoverRadius: 8,
bezierCurve: false,
order: 2,
stack: 1
},
{
type: 'bar',
label: 'refunds',
data: [-1,-5,-6],
backgroundColor: 'lightblue',
borderColor: 'black',
fill: false,
pointRadius:6,
pointHoverRadius: 6,
bezierCurve: false,
stack: 1
},
{
type: 'bar',
label: 'taxes',
backgroundColor: 'blue',
data: [-1,-5,-6],
borderColor: 'black',
fill: false,
pointRadius: 6,
pointHoverRadius: 6,
bezierCurve: false,
stack: 1
},
{
type: 'bar',
label: 'fees',
data: [-10,-10,-16],
backgroundColor: 'yellow',
borderColor: 'black',
fill: false,
pointRadius: 6,
pointHoverRadius: 6,
bezierCurve: false,
stack: 2
},
{
type: 'bar',
label: 'net revenue',
data: [30,40,50],
backgroundColor: 'pink',
borderColor: 'black',
fill: false,
pointRadius: 6,
pointHoverRadius: 6,
bezierCurve: false,
order: 1,
stack: 2
},
{
type: 'line',
label: 'net revenue',
data: [30,40,50],
backgroundColor: 'pink',
borderColor: 'black',
fill: false,
pointRadius: 8,
pointHoverRadius: 8,
bezierCurve: false,
order: 2,
stack: 2
},
{
type: 'bar',
label: 'refunds',
data: [-10,-14,-19],
backgroundColor: 'lightblue',
borderColor: 'black',
fill: false,
pointRadius:6,
pointHoverRadius: 6,
bezierCurve: false,
stack: 2
},
{
type: 'bar',
label: 'taxes',
backgroundColor: 'blue',
data: [-10,-12,-21],
borderColor: 'black',
fill: false,
pointRadius: 6,
pointHoverRadius: 6,
bezierCurve: false,
stack: 2
}
]
};
var ctx = document.getElementById("myChart").getContext("2d");
new Chart(ctx, {
type: 'bar',
data: data,
options: {
legend: {
display: false,
},
tooltips: {
intersect: true,
mode: 'x',
},
responsive: true,
maintainAspectRatio: false,
elements: {
line: {
tension: 0,
},
plugins: {
title: {
display: true,
text: 'title',
},
},
},
scales: {
xAxes: [
{
stacked:true,
gridLines: {
display: false,
},
ticks: {
autoSkip: true,
maxTicksLimit: 9,
maxRotation: 0,
minRotation: 0,
padding: 20,
},
},
],
yAxes: [
{
stacked:true,
gridLines: {
drawBorder: false,
},
ticks: {
fontSize: 14,
fontFamily: 'IBM Plex Sans',
padding: 10,
beginAtZero:true
},
},
],
}
}
});
<script src='https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.3/Chart.min.js'></script>
<canvas id="myChart" style="height: 300px"></canvas>
For comparison and grouping i tried using stack property.
The problem here is the line chart, i want to draw this line chart like on this pic: expected_result
And when i hovering over any column of a pair of columns, I want to see the information of both columns in the tooltip.
How can i do this?

when click legend item in chart.js my bar is hiden but value of bar not hide

this is my html code:
<div class="chart col-md-12">
<canvas id="bar-chart-grouped2" style="min-height: 250px; height: 250px; max-height: 400px; max-width: 100%;margin-top:1%;"></canvas>
</div>
and chartjs code
new Chart(document.getElementById("bar-chart-grouped"), {
type: 'bar',
data: {
labels: <%=Newtonsoft.Json.JsonConvert.SerializeObject(Date_Solar_Index)%>,
datasets: [
{
label: "Total_Recived",
backgroundColor: "#17a2b8",
fillColor: "rgba(151,187,205,0.5)",
borderColor: '#e2e2e2',
borderWidth: '2',
data:<%=Newtonsoft.Json.JsonConvert.SerializeObject(POID_MMS_Index)%>,
}, {
label: "valideted",
backgroundColor: "#28a745",
fillColor: "rgba(151,187,205,0.5)",
borderColor: '#e2e2e2',
borderWidth: '2',
data: <%=Newtonsoft.Json.JsonConvert.SerializeObject(COW_POID_MMS_Index)%>,
}, {
label: "Total_rejected",
backgroundColor: "#ff0000",
fillColor: "rgba(151,187,205,0.5)",
borderColor: '#e2e2e2',
borderWidth: '2',
data: <%=Newtonsoft.Json.JsonConvert.SerializeObject(MNP_POID_MMS_Index)%>,
}, {
label: "Total_Back log",
backgroundColor: "#ffc107",
fillColor: "rgba(151,187,205,0.5)",
borderColor: '#e2e2e2',
borderWidth: '2',
data: <%=Newtonsoft.Json.JsonConvert.SerializeObject(Supervisions_Index)%>,
}, {
label: "Total_Back log",
backgroundColor: "#B60A3B",
fillColor: "rgba(151,187,205,0.5)",
borderColor: '#e2e2e2',
borderWidth: '2',
data: <%=Newtonsoft.Json.JsonConvert.SerializeObject(INDEXED_Index)%>,
}, {
label: "Total_Back log",
backgroundColor: "#72098E",
fillColor: "rgba(151,187,205,0.5)",
borderColor: '#e2e2e2',
borderWidth: '2',
data: <%=Newtonsoft.Json.JsonConvert.SerializeObject(Reject_Index)%>,
}
]
},
options: {
maintainAspectRatio: false,
responsive: true,
title: {
display: true,
text: ''
},
legend: { display: true, position: "bottom", onClick: null },
hover: {
animationDuration: 0
},
animation: {
onComplete: function () {
var chartInstance = this.chart;
var ctx = chartInstance.ctx;
ctx.response = true;
ctx.textAlign = "center";
ctx.font = "bold Arial";
//ctx.fillStyle = "black";
Chart.helpers.each(this.data.datasets.forEach(function (dataset, i) {
var meta = chartInstance.controller.getDatasetMeta(i);
Chart.helpers.each(meta.data.forEach(function (bar, index) {
ctx.save();
// Translate 0,0 to the point you want the text
ctx.translate(bar._model.x, bar._model.y - 20);
// Rotate context by -90 degrees
ctx.rotate(-0.5 * Math.PI);
// Draw text
ctx.fillText(dataset.data[index], 0, 0);
ctx.restore();
}), this)
}), this);
}
},
scales: {
xAxes: [{
gridLines: {
display: false
}
}],
yAxes: [{
gridLines: {
color: "rgba(0, 0, 0, 0)",
},
id: 'B',
type: 'linear',
display: false,
position: 'left',
}, {
gridLines: {
color: "rgba(0, 0, 0, 0)",
},
id: 'A',
type: 'linear',
position: 'right',
display: false,
ticks: {
max: 101,
min: 0
}
}]
}
}
});
enter image description here

you have overriden the default onClick method for the legend legend: { display: true, position: "bottom", onClick: null } remove the onClick: null and try again. It should work then
EDIT: Dear, in your afterDraw you never check if the dataset is hidden you always draw te text. And since the data is still in the data object it will just draw it

How to display value after the bar using chart.js

My chart.js
var ctx_1 = document.getElementById('https_http').getContext('2d');
var myChart_1 = new Chart(ctx_1, {
type: 'horizontalBar',
data: {
labels: ['HTTPS Pages','HTTP Pages'],
datasets: [{
data: [ {{ $array_https_http[0] }}, {{ $array_https_http[1] }}],
backgroundColor: [
'rgb(81, 170, 120)',
'rgb(198, 222, 208)'
]
}]
},
options: {
showAllTooltips: true,
tooltips: {
enabled: true,
displayColors: false,
yPadding: 20,
xPadding: 30,
caretSize: 10,
backgroundColor: 'rgba(240, 240, 240, 1)',
bodyFontSize: 16,
bodyFontColor: 'rgb(50, 50, 50)',
borderColor: 'rgba(0,0,0,1)',
borderWidth: 1,
cornerRadius: 0,
yAlign: 'bottom',
xAlign: 'center',
position: 'custom',
custom: function(tooltip) {
if (!tooltip) return;
// disable displaying the color box;
tooltip.displayColors = false;
},
callbacks: {
// use label callback to return the desired label
label: function(tooltipItem, data) {
return tooltipItem.yLabel + " : " + tooltipItem.xLabel ;
},
// remove title
title: function(tooltipItem, data) {
return;
}
}
},
responsive: false,
legend: { display: false },
scales: {
yAxes: [{
ticks: {
beginAtZero:true,
},
gridLines: {
display: false
},
}],
xAxes: [{
ticks: {
stepSize:100
}
}],
}
}
});
My tooltips code
Chart.Tooltip.positioners.custom = function(elements, position) {
if (!elements.length)
return false;
var em = elements[0]._model;
return {
x: em.x-((em.x-em.base)/2),
y: em.y+em.height/4
}
}
My output
My expected output
Is there anyone can help me how to put those value after the bar like the second picture. I just want to display the value to know even its zero. My custom tooltips was to show a different hover rather than default. All your help are appreciated and thank you in advance.

You can use the chartjs.datalabel plugin for achieving the need. I have created a fiddle for you -> http://jsfiddle.net/Labkrpf4/
Hope it helps!
var ctx_1 = document.getElementById('https_http').getContext('2d');
var myChart_1 = new Chart(ctx_1, {
type: 'horizontalBar',
data: {
labels: ['HTTPS Pages', 'HTTP Pages'],
datasets: [{
data: [0, 430],
backgroundColor: [
'rgb(81, 170, 120)',
'rgb(198, 222, 208)'
]
}]
},
options: {
showAllTooltips: true,
tooltips: {
enabled: true,
displayColors: false,
yPadding: 20,
xPadding: 30,
caretSize: 10,
backgroundColor: 'rgba(240, 240, 240, 1)',
bodyFontSize: 16,
bodyFontColor: 'rgb(50, 50, 50)',
borderColor: 'rgba(0,0,0,1)',
borderWidth: 1,
cornerRadius: 0,
yAlign: 'bottom',
xAlign: 'center',
position: 'custom',
custom: function(tooltip) {
if (!tooltip) return;
// disable displaying the color box;
tooltip.displayColors = false;
},
callbacks: {
// use label callback to return the desired label
label: function(tooltipItem, data) {
return tooltipItem.yLabel + " : " + tooltipItem.xLabel;
},
// remove title
title: function(tooltipItem, data) {
return;
}
}
},
responsive: false,
legend: {
display: false
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true,
},
gridLines: {
display: false
},
}],
xAxes: [{
ticks: {
stepSize: 100
}
}],
},
plugins: {
datalabels: {
align: 'end',
anchor: 'end',
backgroundColor: function(context) {
return context.dataset.backgroundColor;
},
borderRadius: 4,
color: 'white',
formatter: Math.round
}
}
}
});

Hide first label in legend in a Chart using chart.js

I have created a stacked bar chart and i have to hide first dataset's label and its box in legend which is "Total Line", Is there anyway to hide first or any dataset's label. i have read the documentation there is a filter in options but it didn't work.
Hiding This label
Here is the html and js for chart
var ctx = document.getElementById("girth-measure-chart");
var totalLine = [115, 118, 88, 93, 103, 118, 125]
var total = [112, 115, 85, 90, 100, 115, 122]
var arms = [46, 55, 41, 41, 47, 54, 57]
var neck = [17, 20, 15, 15, 17, 20, 21]
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep"],
datasets: [{
type: 'line',
label: 'Total Line',
data: totalLine,
fill: false,
borderColor: ["#ff7899"],
legend: false,
pointBackgroundColor: "#ff151f",
pointRadius: 8,
pointHoverRadius: 8,
pointHoverBackgroundColor: "#990e14",
pointHoverBorderColor: "#6754d3"
}, {
type: 'bar',
label: 'Neck',
data: neck,
backgroundColor: "#e99449",
hoverBackgroundColor: "#d36d14"
}, {
type: 'bar',
label: 'Arms',
data: arms,
backgroundColor: "#49bae9",
hoverBackgroundColor: "#0789bf"
}, {
type: 'bar',
label: 'Total',
data: total,
backgroundColor: "#6754d3",
hoverBackgroundColor: "#260cbd"
}
]
},
options: {
legend: {
display: true,
labels: {
display: true,
boxWidth: 12,
}
},
responsive: true,
scales: {
xAxes: [{
stacked: true,
gridLines: {
display: false
},
barThickness: 25,
ticks: {
display: true,
fontFamily: "Montserrat",
fontColor: "#2c405a",
fontSize: 12
}
}],
yAxes: [{
gridLines: {
display: false
},
ticks: {
display: false,
stepSize: 10,
min: 0,
max: 150,
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.1/Chart.bundle.js"></script>
<div class="chart-container">
<div class="girth-measure-chart-inner" style="width: 100%;">
<canvas id="girth-measure-chart" height=""></canvas>
</div>
</div>

Use the filter method under options.
options: {
legend: {
labels: {
filter: function(legendItem, chartData) {
// return true or false based on legendItem's datasetIndex (legendItem.datasetIndex)
}
}
}
}
In your case return false for the first index and true for the rest.
var ctx = document.getElementById("girth-measure-chart");
var totalLine = [115, 118, 88, 93, 103, 118, 125]
var total = [112, 115, 85, 90, 100, 115, 122]
var arms = [46, 55, 41, 41, 47, 54, 57]
var neck = [17, 20, 15, 15, 17, 20, 21]
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep"],
datasets: [{
type: 'line',
label: 'Total Line',
data: totalLine,
fill: false,
borderColor: ["#ff7899"],
legend: false,
pointBackgroundColor: "#ff151f",
pointRadius: 8,
pointHoverRadius: 8,
pointHoverBackgroundColor: "#990e14",
pointHoverBorderColor: "#6754d3"
}, {
type: 'bar',
label: 'Neck',
data: neck,
backgroundColor: "#e99449",
hoverBackgroundColor: "#d36d14"
}, {
type: 'bar',
label: 'Arms',
data: arms,
backgroundColor: "#49bae9",
hoverBackgroundColor: "#0789bf"
}, {
type: 'bar',
label: 'Total',
data: total,
backgroundColor: "#6754d3",
hoverBackgroundColor: "#260cbd"
}
]
},
options: {
legend: {
labels: {
filter: function(legendItem, chartData) {
if (legendItem.datasetIndex === 0) {
return false;
}
return true;
}
}
},
responsive: true,
scales: {
xAxes: [{
stacked: true,
gridLines: {
display: false
},
barThickness: 25,
ticks: {
display: true,
fontFamily: "Montserrat",
fontColor: "#2c405a",
fontSize: 12
}
}],
yAxes: [{
gridLines: {
display: false
},
ticks: {
display: false,
stepSize: 10,
min: 0,
max: 150,
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.1/Chart.bundle.js"></script>
<div class="chart-container">
<div class="girth-measure-chart-inner" style="width: 100%;">
<canvas id="girth-measure-chart" height=""></canvas>
</div>
</div>