js制作报表

// 示例：使用分页加载数据
function loadData(page, pageSize) {
    fetch(`/api/data?page=${page}&pageSize=${pageSize}`)
        .then(response => response.json())
        .then(data => {
            // 处理数据并更新报表
        });
}

// 示例：使用虚拟滚动
import VirtualScroll from 'virtual-scroll';

const virtualScroll = new VirtualScroll({
    itemHeight: 30,
    containerHeight: 300,
    totalItems: 1000
});

virtualScroll.on('scroll', ({ start, end }) => {
    // 渲染 start 到 end 范围内的数据
});

// 示例：使用 Highcharts 创建交互式图表
Highcharts.chart('container', {
    chart: {
        type: 'bar'
    },
    title: {
        text: 'Sales Report'
    },
    xAxis: {
        categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May']
    },
    yAxis: {
        title: {
            text: 'Sales'
        }
    },
    series: [{
        name: 'Sales',
        data: [100, 150, 200, 250, 300]
    }]
});

// 示例：服务器端数据过滤
app.get('/api/data', (req, res) => {
    const userRole = req.user.role;
    const filteredData = data.filter(item => item.role === userRole);
    res.json(filteredData);
});