D3.js 用层画条形图
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>testD3-3-drawingDivBar</title> <script type="text/javascript" src="http://localhost:8080/spring/js/d3.js"></script> <style type="text/css"> div.bar { display: inline-block; width: 20px; margin-right: 2px; background-color: teal; } </style> </head> <body> <script type="text/javascript"> var dataset = [ 5, 10, 15, 20, 25 ]; d3.select("body").selectAll("div") .data(dataset) .enter() .append("div") .attr("class", "bar") .style("height", function(d) { return (d * 5) + "px"; }); </script> </body> </html>
代码解释:
1.1 为同类层添加样式
div.bar {
display: inline-block;
width: 20px;
background-color: teal;
}
1.2 声明要为某类层设置属性
.attr("class", "bar")
1.3 为每个特定的层设置属性
.style("height", function(d) {
return (d * 5) + "px";
});
1.4 设置层之间的间隔
margin-right: 2px;