Chart.js -向折线图背景添加渐变

<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>

<canvas id="myChart"></canvas>

var ctx = document.getElementById('myChart').getContext('2d');
var gradient = ctx.createLinearGradient(0, 0, 0, 400); // 创建线性渐变对象
gradient.addColorStop(0, 'rgba(255, 0, 0, 0.5)'); // 添加渐变颜色
gradient.addColorStop(1, 'rgba(0, 0, 255, 0.5)'); // 添加渐变颜色

var chart = new Chart(ctx, {
    type: 'line',
    data: {
        labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
        datasets: [{
            label: 'My Dataset',
            data: [10, 20, 30, 40, 50, 60, 70],
            backgroundColor: gradient, // 设置背景渐变
            borderColor: 'rgba(0, 0, 0, 1)', // 设置边框颜色
            borderWidth: 1 // 设置边框宽度
        }]
    },
    options: {
        // 配置其他选项
    }
});