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;
     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>

用层画条形图

代码解释：

1.1 为同类层添加样式

div.bar {
    display: inline-block;
     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;