TauCharts 是最灵活的 JavaScript 图表库之一。它是基于 D3 创建的，是一个以数据为中心的 JavaScript 图表库，可以改进数据可视化的效果。TauCharts 十分灵活，访问其 api 也十分轻松。TauCharts 为用户提供了无缝映射和可视化的数据，使用 TauCharts 能够设计出十分美观的数据界面。同时，TauCharts 也和易于学习。

通过 npm 安装 TauCharts：

npm install taucharts

TauCharts 绘制水平线的代码示例： 

var defData = [
        {"team": "d", "cycleTime": 1, "effort": 1, "count": 1, "priority": "low"}, {
            "team": "d",
            "cycleTime": 2,
            "effort": 2,
            "count": 5,
            "priority": "low"
        }, {"team": "d", "cycleTime": 3, "effort": 3, "count": 8, "priority": "medium"}, {
            "team": "d",
            "cycleTime": 4,
            "effort": 4,
            "count": 3,
            "priority": "high"
        }, {"team": "l", "cycleTime": 2, "effort": 1, "count": 1, "priority": "low"}, {
            "team": "l",
            "cycleTime": 3,
            "effort": 2,
            "count": 5,
            "priority": "low"
        }, {"team": "l", "cycleTime": 4, "effort": 3, "count": 8, "priority": "medium"}, {
            "team": "l",
            "cycleTime": 5,
            "effort": 4,
            "count": 3,
            "priority": "high"
        },
        {"team": "k", "cycleTime": 2, "effort": 4, "count": 1, "priority": "low"}, {
            "team": "k",
            "cycleTime": 3,
            "effort": 5,
            "count": 5,
            "priority": "low"
        }, {"team": "k", "cycleTime": 4, "effort": 6, "count": 8, "priority": "medium"}, {
            "team": "k",
            "cycleTime": 5,
            "effort": 8,
            "count": 3,
            "priority": "high"
        }];
var chart = new tauCharts.Chart({
            data: defData,
            type: 'horizontalBar',           
            x: 'effort',
            y: 'team',
            color:'priority'
        });
chart.renderTo('#bar');

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