Question

csv文件如下所示：

letter,frequency,description
A,.08167,single line 
B,.01492,"here you are, comma works
but this text is still a one-liner"
C,.02780,and another single one
D,.04253,and another single one

所以，那里有三排四排。由于引号，逗号（＆＃34; ...在这里，...＆＃34;）被转义。这很好用。

但是，换行不是这种情况。

我正在使用d3-tip。

完整代码：

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.bar {
  fill: orange;
}

.bar:hover {
  fill: orangered ;
}

.x.axis path {
  display: none;
}

.d3-tip {
  line-height: 1;
  font-weight: bold;
  padding: 12px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  border-radius: 2px;
}

/* Creates a small triangle extender for the tooltip */
.d3-tip:after {
  box-sizing: border-box;
  display: inline;
  font-size: 10px;
  width: 100%;
  line-height: 1;
  color: rgba(0, 0, 0, 0.8);
  content: "\25BC";
  position: absolute;
  text-align: center;
}

/* Style northward tooltips differently */
.d3-tip.n:after {
  margin: -1px 0 0 0;
  top: 100%;
  left: 0;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script>
<script>

var margin = {top: 40, right: 20, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var formatPercent = d3.format(".0%");

var x = d3.scale.ordinal()
    .rangeRoundBands([0, width], .1);

var y = d3.scale.linear()
    .range([height, 0]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .tickFormat(formatPercent);

var tip = d3.tip()
  .attr('class', 'd3-tip')
  .offset([-10, 0])
  .html(function(d) {
    return d.description;
  })

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

svg.call(tip);

d3.csv("d3-tip.csv", type, function(error, data) {
  x.domain(data.map(function(d) { return d.letter; }));
  y.domain([0, d3.max(data, function(d) { return d.frequency; })]);

  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Frequency");

  svg.selectAll(".bar")
      .data(data)
    .enter().append("rect")
      .attr("class", "bar")
      .attr("x", function(d) { return x(d.letter); })
      .attr("width", x.rangeBand())
      .attr("y", function(d) { return y(d.frequency); })
      .attr("height", function(d) { return height - y(d.frequency); })
      .on('mouseover', tip.show)
      .on('mouseout', tip.hide)

});

function type(d) {
  d.frequency = +d.frequency;
  return d;
}

</script>

Answer 1

d3.csv 保持您的换行符，这不是问题。

我猜测问题是你没有在CSS中正确定义white-space：

white-space属性用于描述如何处理元素内的空白。

查看以下两个片段。

这是没有设置空白区域的示例：

＆＃13;

var csv = d3.csvParse(d3.select("#csv").text());

d3.select("body").selectAll("foo")
  .data(csv)
  .enter()
  .append("p")
  .html(d => d.description)

＆＃13;

pre {
  display: none;
}

＆＃13;

<script src="https://d3js.org/d3.v4.min.js"></script>
<pre id="csv">letter,frequency,description
A,.08167,single line 
B,.01492,"here you are, comma works
but this text is still a one-liner"
C,.02780,and another single one
D,.04253,and another single one</pre>

＆＃13;

现在使用相同的代码，设置white-space：

＆＃13;

var csv = d3.csvParse(d3.select("#csv").text());

d3.select("body").selectAll("foo")
  .data(csv)
  .enter()
  .append("p")
  .html(d => d.description)

＆＃13;

pre {
  display: none;
}

p {
  white-space: pre;
}

＆＃13;

<script src="https://d3js.org/d3.v4.min.js"></script>
<pre id="csv">letter,frequency,description
A,.08167,single line 
B,.01492,"here you are, comma works
but this text is still a one-liner"
C,.02780,and another single one
D,.04253,and another single one</pre>

＆＃13;

你可以看到换行符就在那里。

话虽如此，找到工具提示（d3-tip）的类并在CSS中正确设置其white-space：

.d3-tip {
    line-height: 1;
    font-weight: bold;
    padding: 12px;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    border-radius: 2px;
    white-space: pre;
}

PS：我使用HTML <pre>存储您的CSV而不是真正的CSV文件，我无法在Stack片段中使用。

D3.js：显示来自csv文件的转义换行符

1 个答案: