多个圆环图未显示百分比

Question

I try to show multiple donut charts on the same page. But it's not showing. I am using a loop for creating this chart and added multiple html id to show this.

var details = [{category: "Doctor", number: 25}, {category: "Shopping", number: 20}, { category: "Restaurants", number: 10}, {    category: "FastFood", number: 5}, { category: "Internet", number: 8},{ category: "Other", number: 32}];
for (i = 1; i <= 4; i++) 
    chartScript(details, '#custom-chart-' + i);
function chartScript(details, cls) {
    var width = 300,
        height = 500;
    var colors = d3.scaleOrdinal(d3.schemeDark2);
    var svg = d3.select(cls).append("svg")
        .attr("width", width).attr("height", height);
    details.sort(function (a, b) {
        return b['number'] - a['number'];
    });

    var data = d3.pie().sort(null).value(function (d) {
        return d.number;
    })(details);

    var segments = d3.arc()
        .innerRadius(80)
        .outerRadius(150)
        .padAngle(.05)
        .padRadius(30);
    var sections = svg.append("g").attr("transform", "translate(150,250)").selectAll("path").data(data);
    sections.enter().append("path").attr("d", segments).attr("fill", function (d) {
        return colors(d.data.number);
    });
    var content = d3.select("g").selectAll("text").data(data);
    content.enter().append("text").classed("inside", true).each(function (d) {
        var center = segments.centroid(d);
        d3.select(this).attr("x", center[0]).attr("y", center[1]).text(d.data.number + '%')
    })
}

I got output like this(1st one is showing % but others are not):

Answer 1

You are using d3 like this

   var sections = svg.append("g").attr("transform", "translate(150,250)")

and in this line

var content = d3.select("g").selectAll("text").data(data);

instead of d3 You should use

var content = sections.select("g").selectAll("text").data(data);

That way it will select all the <g> tags in the sections

Answer 2

As a rule of thumb: in a D3 code, never use a loop ( for , while , forEach etc...) for appending elements.

So, just change that awkward loop for a proper D3 selection...

var cls = d3.select("body").selectAll(null)
  .data(d3.range(4))
  .enter()
  .append("div");

... and not only you will fix the issue you mentioned but also avoid future problems.

Here is a demo using (most of) your code:

 var details = [{ category: "Doctor", number: 25 }, { category: "Shopping", number: 20 }, { category: "Restaurants", number: 10 }, { category: "FastFood", number: 5 }, { category: "Internet", number: 8 }, { category: "Other", number: 32 }]; var cls = d3.select("body").selectAll(null) .data(d3.range(4)) .enter() .append("div"); var width = 180, height = 180; var colors = d3.scaleOrdinal(d3.schemeDark2); var svg = cls.append("svg") .attr("width", width).attr("height", height); details.sort(function(a, b) { return b['number'] - a['number']; }); var data = d3.pie().sort(null).value(function(d) { return d.number; })(details); var segments = d3.arc() .innerRadius(45) .outerRadius(85) .padAngle(.05) .padRadius(30); var g = svg.append("g").attr("transform", "translate(90,90)"); var sections = g.selectAll("path").data(data); sections.enter().append("path").attr("d", segments).attr("fill", function(d) { return colors(d.data.number); }); var content = g.selectAll("text").data(data); content.enter().append("text").classed("inside", true).each(function(d) { var center = segments.centroid(d); d3.select(this).attr("x", center[0]).attr("y", center[1]).text(d.data.number + '%') })

 div { display: inline-block; } text { text-anchor: middle; }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.7.0/d3.min.js"></script>