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chart.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Chart.js Example</title>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
</head>
<body>
<div style="max-width: 100%; margin: auto;">
<canvas id="myChart"></canvas>
</div>
<script>
const ctx = document.getElementById('myChart').getContext('2d');
const data = [84, 63, 39, 30];
const labels = ['Membri della Community', 'Prossimi Incontri', 'Dicci la tua!', 'Condivisione notizie'];
const myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: labels,
datasets: [{
label: 'Numero di Membri',
data: data,
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)',
'rgba(75, 192, 192, 0.2)'
],
borderColor: [
'rgba(255, 99, 132, 1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)',
'rgba(75, 192, 192, 1)'
],
borderWidth: 1
}]
},
options: {
responsive: true,
maintainAspectRatio: false, // Adatta il grafico alle dimensioni del contenitore
plugins: {
tooltip: {
enabled: true
},
legend: {
display: true,
position: 'top'
},
// Plugin per mostrare i totali sopra le barre
datalabels: {
anchor: 'end',
align: 'top',
formatter: (value) => value
}
},
scales: {
x: {
ticks: {
maxRotation: 45, // Rotazione etichette sull'asse X per spazi stretti
minRotation: 0
}
},
y: {
beginAtZero: true
}
}
},
plugins: [{
id: 'totals',
afterDatasetsDraw: (chart) => {
const {ctx, data, scales} = chart;
ctx.save();
ctx.font = '14px Arial';
ctx.fillStyle = 'black';
ctx.textAlign = 'center';
data.datasets[0].data.forEach((value, index) => {
const barX = scales.x.getPixelForValue(index);
const barY = scales.y.getPixelForValue(value);
ctx.fillText(value, barX, barY - 10); // Posiziona il totale sopra la barra
});
ctx.restore();
}
}]
});
</script>
</body>
</html>