index.js
const express = require('express')
const app = express()
app.use(express.static('static'))
app.get('/data', (req,res) => {
res.json({
labels: ["HTML", "CSS", "JAVASCRIPT", "CHART.JS", "JQUERY", "BOOTSTRP"],
datasets: [{
label: "online tutorial subjects",
data: [20, 40, 30, 35, 30, 20],
backgroundColor: ['yellow', 'aqua', 'pink', 'lightgreen', 'lightblue', 'gold'],
borderColor: ['black'],
borderWidth: 2,
pointRadius: 5,
},{
label: "online tutorial subjects",
data: [10, 50, 20, 25, 40, 30],
borderColor: ['red'],
borderWidth: 2,
pointRadius: 5,
}],
})
})
app.listen(3080, () => {
console.log("서버가 실행됩니다.")
})
chart_js_ajax.html
<!DOCTYPE>
<html>
<head>
<meta charset- "UTF-8" />
<!--<meta name="viewport" content="width=device-width, initial-scale=1" />-->
<title>chart.js</title>
<script src="js/chart-3.1.1.js"></script>
</head>
<body>
<canvas id="chartId" aria-label="chart" heigth="350" width="580"></canvas>
<script>
fetch(window.location.origin + "/data", {
method: "get",
})
.then((response) => response.json())
.then((data) => {
console.log(data)
const chrt = document.getElementById("chartId").getContext("2d");
const chartId = new Chart(chrt, {
type: 'line',
data: data,
options: {
responsive: false,
},
});
})
</script>
</body>
</html>
Local File
<!DOCTYPE>
<html>
<head>
<meta charset- "UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>chart.js</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.1.1/chart.min.js"></script>
<!--<script src="js/chart-3.1.1.js"></script>-->
</head>
<body>
<canvas id="chartId" aria-label="chart" heigth="350" width="580"></canvas>
<script>
var chrt = document.getElementById("chartId").getContext("2d");
var chartId = new Chart(chrt, {
type: 'line',
data: {
labels: ["HTML", "CSS", "JAVASCRIPT", "CHART.JS", "JQUERY", "BOOTSTRP"],
datasets: [{
label: "online tutorial subjects",
data: [20, 40, 30, 35, 30, 20],
backgroundColor: ['yellow', 'aqua', 'pink', 'lightgreen', 'lightblue', 'gold'],
borderColor: ['black'],
borderWidth: 2,
pointRadius: 5,
},{
label: "online tutorial subjects",
data: [10, 50, 20, 25, 40, 30],
//backgroundColor: ['yellow', 'aqua', 'pink', 'lightgreen', 'lightblue', 'gold'],
borderColor: ['red'],
borderWidth: 2,
pointRadius: 5,
}],
},
options: {
responsive: false,
},
});
</script>
</body>
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