Question

这是我用来可视化我试图从我正在使用的数据集中获取的条形图的代码。但它没有显示任何东西。

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="X-UA-Compatible" content="IE=edge">



        <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
        <link type="text/css" rel="stylesheet" href="style.css"/>
        <script type="text/javascript" src="d3/d3.js"></script>
        <script type="text/javascript" src="d3/d3.layout.js"></script>
        <script type="text/javascript" src="d3/d3.v3.js"></script>
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
        <link rel="stylesheet" href="css/bootstrap.min.css">
        <style type="text/css">
.chart {
display: block;
margin: auto;
margin-top: 0px;
}

text {
 font-size: 11px;
}

rect {
fill: none;
}

div.bar {
            display: inline-block;
            width: 20px;
            height: 75px;   /* Gets overriden by D3-assigned height below */
            background-color: teal;
            margin-right: 2px;
        }

.axis path,
        .axis line {
          fill: none;
          stroke: black;
          shape-rendering: crispEdges;
        }

        .axis text {
          font-family: sans-serif;
          font-size: 11px;
        }


</style>

</head>



<body>
    <div class="container" >
        <div class="row" >
            <div class="col-md-4 img-responsive"><img src="img/e2.png" alt="Smiley face" height="100" width="100"></div>


            <div class="col-md-4" >
            <div id="body">
              <div id="footer">
                <h3>Course Scheduler TreeMap</h3>
                <div class="hint">click or option-click to descend or ascend</div>
                <div><select>
                  <option value="size">Size</option>
                  <option value="count">Count</option>
                </select></div>
              </div>
            </div>
            </div>

             <div class="col-md-4" >
                <h1 >Plan Your Courses</h1>

            </div>

        </div>



        <div class="row">
            <div class="col-md-12">
                <h2>Implementation of SVG Work</h2>

  <script type="text/javascript"> 
   var dataset = [ 25, 7, 5, 26, 11, 8, 25, 14, 23, 19,
            14, 11, 22, 29, 11, 13, 12, 17, 18, 10,
            24, 18, 25, 9, 3 ];


       //Width and height
            var w = 500;
            var h = 100;
            var barPadding = 1;   // <-- New!

          /*  var dataset =[] ;
            for (var i =0; i<25; i++) {
                var newNumber = Math.round(Math.random() * 25);
                dataset.push(newNumber);
            }*/

       //Create SVG element
            var svg = d3.select("body")
            .append("svg")
            .attr("width", w)
            .attr("height", h);

        // GENERATING RECTANGLES AND MAKING BAR CHART

             svg.selectAll("rect")
           .data(dataset)
           .enter()
           .append("rect")
           .attr("x", function(d, i) {
                return i * (w / dataset.length);
            })
           .attr("y", function(d) {
                return h- (d*5);
           })
           .attr("width", w / dataset.length - barPadding)
           .attr("height", function(d) {
                return d*5;
           })
           .attr("fill", function(d) {
                return "rgb(0, 0, " + (d * 10) + ")";
            });

    // APPENDIND TEXT INTO THE BAR CHART

        svg.selectAll("text")
           .data(dataset)
           .enter()
           .append("text")
           .text(function(d) {
                return d;
           })
           .attr("x", function(d, i) {
                return i * (w / dataset.length) + 3;
           })
           .attr("y", function(d) {
                return h - (d * 4) + 10;
           })
           .attr("font-family", "sans-serif")
           .attr("font-size", "11px")
           .attr("fill", "white");


    </script>

            </div>
        </div>

    </div>
</body>
</html>

------- 但是当使用html中没有div事件并且整个javascript代码写在正文中时，相同的代码正在工作。这是正常工作的代码。

--------

    <!DOCTYPE html>
    <html lang="en">
        <head>
            <meta charset="utf-8">
            <title>Bar Char Test</title>
            <script type="text/javascript" src="d3/d3.v3.js"></script>

            <style type="text/css">

                div.bar {
                    display: inline-block;
                    width: 20px;
                    height: 75px;   /* Gets overriden by D3-assigned height below */
                    background-color: teal;
                    margin-right: 2px;
                }

            </style>


        </head>


        <body>

            <script type="text/javascript"> 
           var dataset = [ 25, 7, 5, 26, 11, 8, 25, 14, 23, 19,
                    14, 11, 22, 29, 11, 13, 12, 17, 18, 10,
                    24, 18, 25, 9, 28 ];


               //Width and height
                    var w = 500;
                    var h = 120;
                    var barPadding = 1;   // <-- New!


               //Create SVG element
                    var svg = d3.select("body")
                    .append("svg")
                    .attr("width", w)
                    .attr("height", h);

                // GENERATING RECTANGLES AND MAKING BAR CHART

                     svg.selectAll("rect")
                   .data(dataset)
                   .enter()
                   .append("rect")
                   .attr("x", function(d, i) {
                        return i * (w / dataset.length);
                    })
                   .attr("y", function(d) {
                        return h- (d*5);
                   })
                   .attr("width", w / dataset.length - barPadding)
                   .attr("height", function(d) {
                        return d*5;
                   })
                   .attr("fill", function(d) {
                        return "rgb(0, 0, " + (d * 10) + ")";
                    });

            // APPENDIND TEXT INTO THE BAR CHART

                svg.selectAll("text")
                   .data(dataset)
                   .enter()
                   .append("text")
                   .text(function(d) {
                        return d;
                   })
                   .attr("x", function(d, i) {
                        return i * (w / dataset.length) + 3;
                   })
                   .attr("y", function(d) {
                        return h - (d * 4) + 10;
                   })
                   .attr("font-family", "sans-serif")
                   .attr("font-size", "11px")
                   .attr("fill", "white");


            </script>
            </body> 
            </html>

Answer 1

问题是应用于rect元素的以下css规则，它隐藏了条形图，删除它并且它应该可以正常工作

rect {
    fill: none;
}

Answer 2

我认为＆＃34; rect＆＃34;您正在使用的样式将解决您的目的。尝试删除＆＃34; rect＆＃34;从CSS的样式部分，因为你正在使用＆＃34; rect＆＃34;来自SVG的事情。

在html代码的div部分添加的Javascript代码没有显示任何内容。

2 个答案: