Peek.js 是一个基于 D3.js 开发的 Web 图表创建库。特性：

• 面向对象可重用的图表

• JSON 数据格式

• 易于理解和定制

/*      Charts are instantiated as objects. There are two different ways to pass      data and draw the chart:         i) by passing a data array to render() directly                 var trend_chart = new Trend("#trend-chart");              trend_chart.render(trend_data);          ii) by setting the url to the data and calling draw()                 var trend_chart = new Trend("#trend-chart");              trend_chart.url = 'trend.json';               chart.draw();  */     var trend_chart = new Trend("#trend-chart");  //trend_chart.interpolate = "monotone"; //default=cardinal  trend_chart.showTooltip = true;  trend_chart.render(trend_data);     var stacked_chart = new Stacked("#stacked-bar-chart");  stacked_chart.render(stacked_data);     var compare_chart = new Compare('#compare-chart');  compare_chart.render(horizontal_bar_data);     var pie_one = new Pie("#pie-one");  var pie_two = new Pie("#pie-two");  pie_one.render(pie_data_one);  pie_two.render(pie_data_two);  pie_one.legend("#pie-legend", pie_data_one);

项目主页：http://www.open-open.com/lib/view/home/1411438969046