jQuery addClass example

Change class name on click in jQuery

by vrluckyin India

HTML

<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<div id="banner-message">
  <p>Hello World</p>
  <button>Change color</button>
</div>

CSS

.background {
  fill: none;
  pointer-events: all;
}

#states {
  fill: #aaa;
}

#states .active {
  fill: orange;
}

#state-borders {
  fill: none;
  stroke: #fff;
  stroke-width: 1.5px;
  stroke-linejoin: round;
  stroke-linecap: round;
  pointer-events: none;
}

JavaScript

var width = 960,
    height = 500,
    centered;

var projection = d3.geo.albersUsa()
    .scale(1070)
    .translate([width / 2, height / 2]);

var path = d3.geo.path()
    .projection(projection);

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

svg.append("rect")
    .attr("class", "background")
    .attr("width", width)
    .attr("height", height)
    .on("click", clicked);

var g = svg.append("g");
var dataObjects= [
{d:"M239 0 h 320 v 80 h -320 Z", fill:"#fff2cc", stroke:"black"},
{d:"M239 120 h 320 v 80 h -320 Z", fill:"#a9c4eb", stroke:"black"},
{d:"M239 240 h 320 v 80 h -320 Z", fill:"#f8cecc", stroke:"black"},
{d:"M659 280 h 120 v 320 h -120 Z", fill:"#fff2cc", stroke:"black", transform:"rotate(-23,719,440)"},
{d:"M49 290 h 120 v 320 h -120 Z", fill:"#99ffff", stroke:"black", transform:"rotate(19,109,450)"},
{d:"M169 480 h 230 v 80 h -230 Z", fill:"#a9c4eb", stroke:"black"},
{d:"M424 480 h 230 v 80 h -230 Z", fill:"#a9c4eb", stroke:"black"},
{d:"M79 680 h 680 v 40 h -680 Z", fill:"#cc0066", stroke:"black"}
]

g.append("g")
      .attr("id", "states")
    .selectAll("path")
      .data(dataObjects)
    .enter().append("path")
      .attr("d", function(d){console.log('d',d.d)})
      .on("click", clicked);

  g.append("path")
      .datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; }))
      .attr("id", "state-borders")
      .attr("d", path);

function clicked(d) {
  var x, y, k;

  if (d && centered !== d) {
    var centroid = path.centroid(d);
    x = centroid[0];
    y = centroid[1];
    k = 4;
    centered = d;
  } else {
    x = width / 2;
    y = height / 2;
    k = 1;
    centered = null;
  }

  g.selectAll("path")
      .classed("active", centered && function(d) { return d === centered; });

  g.transition()
      .duration(750)
      .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")scale(" + k + ")translate(" + -x + "," + -y + ")")
     ...