图例切换中的d3错误 - 未捕获DOMException：无法执行＆＃39; querySelector＆＃39;在＆＃39;文件＆＃39;：

时间：2017-05-10 00:49:56

标签： javascript html css d3.js

我正在尝试为我的折线图启用图例切换，并且在尝试切换＆＃34;通用汽车卡车公司＆＃34;

时出现d3错误

错误：＆＃34;未捕获DOMException：无法执行＆＃39; querySelector＆＃39; on＆＃39; Document＆＃39;＃＆＃39; #line_General Motors Truck Company（GMC）＆＃39;不是有效的选择器。＆＃34;

我认为这是因为＆＃34;（）＆＃34;传说中的角色，虽然不确定。有谁知道如何解决这个问题？

这是一个jsfiddle： https://jsfiddle.net/jw8dskvu/

还有代码段：

＆＃13;
＆＃13; 
var data = [{
  "Brand": "Toyota",
  "Count": 1800,
  "Time": "2017-04-02 16"
}, {
  "Brand": "Toyota",
  "Count": 1172,
  "Time": "2017-04-02 17"
}, {
  "Brand": "Toyota",
  "Count": 2000,
  "Time": "2017-04-02 18"
}, {
  "Brand": "General Motors Truck Company (GMC)",
  "Count": 8765,
  "Time": "2017-04-02 16"
}, {
  "Brand": "General Motors Truck Company (GMC)",
  "Count": 3445,
  "Time": "2017-04-02 17"
}, {
  "Brand": "General Motors Truck Company (GMC)",
  "Count": 1232,
  "Time": "2017-04-02 18"
}];

data.forEach(function(d) {
  d.Time = d3.timeParse("%Y-%m-%d %H")(d.Time)
});

var dataGroup = d3.nest() //d3 method that groups data by Brand  
  .key(function(d) {
    return d.Brand;
  })
  .entries(data);

//var color = d3.scale.category10();
var vis = d3.select("#visualisation"),
  WIDTH = 1000,
  HEIGHT = 500,
  MARGINS = {
    top: 50,
    right: 20,
    bottom: 50,
    left: 50
  },
  xScale = d3.scaleTime().range([MARGINS.left, WIDTH - MARGINS.right]).domain([d3.min(data, function(d) { //set up x-axis based on data
    return d.Time;
  }), d3.max(data, function(d) {
    return d.Time;
  })]),

  yScale = d3.scaleLinear().range([HEIGHT - MARGINS.top, MARGINS.bottom]).domain([d3.min(data, function(d) { //set up y-axis based on data
    return d.Count;
  }), d3.max(data, function(d) {
    return d.Count;
  })]),

  xAxis = d3.axisBottom()
  .scale(xScale),
  yAxis = d3.axisLeft()
  .scale(yScale)

vis.append("svg:g")
  .attr("class", "x axis")
  .attr("transform", "translate(0," + (HEIGHT - MARGINS.bottom) + ")")
  .call(xAxis);

vis.append("svg:g")
  .attr("class", "y axis")
  .attr("transform", "translate(" + (MARGINS.left) + ",0)")
  .call(yAxis);

var lineGen = d3.line()
  .x(function(d) {
    return xScale(d.Time);
  })
  .y(function(d) {
    return yScale(d.Count);
  })
  .curve(d3.curveBasis);

dataGroup.forEach(function(d, i) { //iterate over the dataGroup and create line graph for each brand
  vis.append('svg:path')
    .attr('d', lineGen(d.values))
    .attr('stroke', function(d, j) {
      return "hsl(" + Math.random() * 360 + ",100%,50%)"; //random color for each brand line on graph
    })
    .attr('stroke-width', 2)
    .attr('id', 'line_' + d.key)
    .attr('fill', 'none');

  lSpace = WIDTH / dataGroup.length; //define the legend space based on number of brands
  vis.append("text")
    .attr("x", (lSpace / 2) + i * lSpace)
    .attr("y", HEIGHT)
    .style("fill", "black")
    .attr("class", "legend")
    .on('click', function() {
      var active = d.active ? false : true;
      var opacity = active ? 0 : 1;
      d3.select("#line_" + d.key).style("opacity", opacity);
      d.active = active;
    })
    .text(d.key);
});
＆＃13; 
   .axis path {
   fill: none;
   stroke: #777;
   shape-rendering: crispEdges;
 }
 
 .axis text {
   font-family: Lato;
   font-size: 13px;
 }
 
 .legend {
   font-size: 14px;
   font-weight: bold;
   cursor: pointer;
＆＃13; 
<title>D3 Test</title>
<script src="https://d3js.org/d3.v4.js"></script>

<body>
  <svg id="visualisation" width="1000" height="600"></svg>
  <script src="InitChart.js"></script>
</body>
＆＃13;
＆＃13;
＆＃13;

1 个答案:

答案 0 :(得分：0)

  

我认为这是因为图例中的“（）”字符，但不确定。

是的，但不仅如此：你也不应该在CSS选择器中使用空格。

因此，一个简单的解决方案是在设置ID时删除它们：

.attr('id', 'line_' + d.key.replace(/[ )(]/g,''))

当然，当选择时：

d3.select("#line_" + d.key.replace(/[ )(]/g,''))

这是您更新的代码：

var data = [{
  "Brand": "Toyota",
  "Count": 1800,
  "Time": "2017-04-02 16"
}, {
  "Brand": "Toyota",
  "Count": 1172,
  "Time": "2017-04-02 17"
}, {
  "Brand": "Toyota",
  "Count": 2000,
  "Time": "2017-04-02 18"
}, {
  "Brand": "General Motors Truck Company (GMC)",
  "Count": 8765,
  "Time": "2017-04-02 16"
}, {
  "Brand": "General Motors Truck Company (GMC)",
  "Count": 3445,
  "Time": "2017-04-02 17"
}, {
  "Brand": "General Motors Truck Company (GMC)",
  "Count": 1232,
  "Time": "2017-04-02 18"
}];

data.forEach(function(d) {
  d.Time = d3.timeParse("%Y-%m-%d %H")(d.Time)
});

var dataGroup = d3.nest() //d3 method that groups data by Brand  
  .key(function(d) {
    return d.Brand;
  })
  .entries(data);

//var color = d3.scale.category10();
var vis = d3.select("#visualisation"),
  WIDTH = 1000,
  HEIGHT = 500,
  MARGINS = {
    top: 50,
    right: 20,
    bottom: 50,
    left: 50
  },
  xScale = d3.scaleTime().range([MARGINS.left, WIDTH - MARGINS.right]).domain([d3.min(data, function(d) { //set up x-axis based on data
    return d.Time;
  }), d3.max(data, function(d) {
    return d.Time;
  })]),

  yScale = d3.scaleLinear().range([HEIGHT - MARGINS.top, MARGINS.bottom]).domain([d3.min(data, function(d) { //set up y-axis based on data
    return d.Count;
  }), d3.max(data, function(d) {
    return d.Count;
  })]),

  xAxis = d3.axisBottom()
  .scale(xScale),
  yAxis = d3.axisLeft()
  .scale(yScale)

vis.append("svg:g")
  .attr("class", "x axis")
  .attr("transform", "translate(0," + (HEIGHT - MARGINS.bottom) + ")")
  .call(xAxis);

vis.append("svg:g")
  .attr("class", "y axis")
  .attr("transform", "translate(" + (MARGINS.left) + ",0)")
  .call(yAxis);

var lineGen = d3.line()
  .x(function(d) {
    return xScale(d.Time);
  })
  .y(function(d) {
    return yScale(d.Count);
  })
  .curve(d3.curveBasis);

dataGroup.forEach(function(d, i) { //iterate over the dataGroup and create line graph for each brand
  vis.append('svg:path')
    .attr('d', lineGen(d.values))
    .attr('stroke', function(d, j) {
      return "hsl(" + Math.random() * 360 + ",100%,50%)"; //random color for each brand line on graph
    })
    .attr('stroke-width', 2)
    .attr('id', 'line_' + d.key.replace(/[ )(]/g,''))
    .attr('fill', 'none');

  lSpace = WIDTH / dataGroup.length; //define the legend space based on number of brands
  vis.append("text")
    .attr("x", (lSpace / 2) + i * lSpace)
    .attr("y", HEIGHT)
    .style("fill", "black")
    .attr("class", "legend")
    .on('click', function() {
      var active = d.active ? false : true;
      var opacity = active ? 0 : 1;
      d3.select("#line_" + d.key.replace(/[ )(]/g,'')).style("opacity", opacity);
      d.active = active;
    })
    .text(d.key);
});
   .axis path {
   fill: none;
   stroke: #777;
   shape-rendering: crispEdges;
 }
 
 .axis text {
   font-family: Lato;
   font-size: 13px;
 }
 
 .legend {
   font-size: 14px;
   font-weight: bold;
   cursor: pointer;
<title>D3 Test</title>
<script src="https://d3js.org/d3.v4.js"></script>

<body>
  <svg id="visualisation" width="1000" height="600"></svg>
  <script src="InitChart.js"></script>
</body>

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