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| <head><meta charset="utf-8"> | |
| <script src="https://cdn.staticfile.org/Chart.js/3.9.1/chart.js"></script> | |
| </head> | |
| <body> | |
| <div style="width:600px;height:500px;margin:auto"> | |
| <canvas id="myChart" width="400" height="300"></canvas> | |
| </div> | |
| <button onclick="fx()">转为base64资源</button> | |
| <p></p> | |
| <script> | |
| const ctx = document.getElementById('myChart'); | |
| const myChart = new Chart(ctx, {type: 'bar', | |
| data: {labels: ['Red', 'Blue', 'Yellow', 'Green'], | |
| datasets: [{label: '# 票数',data: [12, 19, 3, 5], | |
| 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: {scales: {y: {beginAtZero: true}}} | |
| }); | |
| </script> | |
| </body> | |
| <script> | |
| function fx(){ | |
| var a=document.getElementById('myChart').toDataURL(); | |
| document.getElementsByTagName('p')[0].innerText=a | |
| } | |
| </script> |