<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>chart.html</title>
<link href="css/mystyle1.css" rel="stylesheet" />
</head>
<body>
<div class="container6">
<h3>차트 실습</h3>
<div style="width: 500px">
<canvas id="myChart"></canvas>
</div>
<input type="button" value="차트데이터변경" id="btn" />
</div>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script>
const ctx = document.getElementById("myChart").getContext("2d");
const config = {
type: 'bar',
data: {
labels: ['A', 'B', 'C', 'D', 'E', 'F'],
datasets: [{
label: 'chart1',
data: [23, 46, 76, 34, 35, 89],
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)',
'rgba(153, 102, 255, 0.2)',
'rgba(255, 159, 64, 0.2)'
],
borderColor: [
'rgba(255, 99, 132, 1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)',
'rgba(75, 192, 192, 1)',
'rgba(153, 102, 255, 1)',
'rgba(255, 159, 64, 1)'
],
borderWidth: 1
}]
}
}
const mychart = new Chart(ctx, config);
const btn = document.getElementById("btn");
btn.addEventListener('click', function() {
let data = config.data.datasets[0].data;
console.log(data);
for(let i=0; i<6; i++){
data[i] = Math.floor( Math.random() * 100 + 1);
}
mychart.update();
});
</script>
</body>
</html>