I am new in JavaScript and I really want to know that how can we display data in form of percentage by fetching percentage data through doughnut chart using JS
<div class="block-text">
<div class="flex-chart"> <div class="box-file"></div><p class="spacing">abc</p>
<p id = "count">20%</p></div>
<div class="flex-chart"> <div class="box-url"></div><p class="spacing">xyz</p>
<p>30%</p>
</div>
</div>
Here is the Doughnut Chart JS code:
<script src="https://cdn.jsdelivr.net/npm/chart.js@2.9.4"></script>
<!-- <script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels@0.7.0"></script> -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-datalabels/2.0.0/chartjs-plugin-datalabels.min.js"></script>
<script>
// setup
const data = {
//labels: ['xyz', 'abc'],
datasets: [{
// label: 'Weekly Sales',
data: [12, 20],
backgroundColor: [
'rgb(254, 214, 10)',
'rgb(255, 90, 48)'
],
borderColor: [
"#ffffff",
],
borderWidth: 1
}]
};
// config
const config = {
type: 'doughnut',
data,
options: {
plugins: {
datalabels: {
formatter: (value, ctx) => {
let datasets = ctx.chart.data.datasets;
if (datasets.indexOf(ctx.dataset) === datasets.length - 1) {
var sum = datasets[0].data.reduce((a, b) => a + b, 0);
var percentage = Math.round((value / sum) * 100) + '%';
return percentage;
} else {
return percentage;
}
},
color: '#fff',
}
}
}
}
// render init block
const myChart = new Chart(
document.getElementById('chart'),
config
);
I want percentage data in replace of 20% because 20% is static at this time
Check this code may be it will help you.
var data = [{
data: [50, 55, 60, 33],
labels: ["India", "China", "US", "Canada"],
backgroundColor: [
"#4b77a9",
"#5f255f",
"#d21243",
"#B27200"
],
borderColor: "#fff"
}];
var options = {
tooltips: {
enabled: false
},
plugins: {
datalabels: {
formatter: (value, ctx) => {
let datasets = ctx.chart.data.datasets;
if (datasets.indexOf(ctx.dataset) === datasets.length - 1) {
let sum = datasets[0].data.reduce((a, b) => a + b, 0);
let percentage = Math.round((value / sum) * 100) + '%';
return percentage;
} else {
return percentage;
}
},
color: '#fff',
}
}
};
var ctx = document.getElementById("pie-chart").getContext('2d');
var myChart = new Chart(ctx, {
type: 'pie',
data: {
datasets: data
},
options: options
});