testxugang.github.io/a.html at main · helloxugang/testxugang.github.io · GitHub

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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">
    <!-- 引入 ECharts 文件 -->
    <script src="https://cdn.jsdelivr.net/npm/echarts@5.1.2/dist/echarts.min.js"></script>
    <title>Document</title>

</head>

<body>
    <button type="button" onclick="myFunction()">发送请求</button>
    <!-- 为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 600px;height:400px;"></div>
    <script>
        // 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));
        // 指定图表的配置项和数据
        var option = {
            title: {
                text: 'ECharts 入门示例'
            },
            tooltip: {},
            legend: {
                data: ["city"]
            },
            xAxis: {
                data: ["衬衣", "羊毛衫", "雪纺衫", "裤子", "高跟鞋", "袜子"]
            },
            yAxis: {},
            series: [{
                name: '销量',
                type: 'bar',
                data: [5, 20, 36, 10, 10, 20]
            }]
        };

        // 使用刚指定的配置项和数据显示图表。
        myChart.setOption(option);

        function myFunction() {
            var xhr = new XMLHttpRequest();
            xhr.onload = function () {
                // 输出接收到的文字数据
                // alert(xhr.responseText)
                var obj = JSON.parse(xhr.responseText)
                // 更新值
                myChart.setOption({
                    xAxis: {
                        data: [obj.data.name, "羊毛衫", "雪纺衫", "裤子", "高跟鞋", "袜子"]
                    },
                    series: [{
                        data: [Math.ceil(Math.random() * 100), 20, 36, 10, 10, 20]
                    }]
                });

            }
            xhr.onerror = function () {
                alert("请求出错");
            }
            // 发送异步 GET 请求
            xhr.open("GET", "https://www.qweather.com/v2/current/condition/s/shanghai-101020100.html?lang=&_=1624502100", true);
            xhr.send();
        }

    </script>
</body>

</html>