javascript - Select node and highlight its connections by feature ID in D3.js -

i have create d3.js network graph. want select node id , highlight , neighbors. have following code

var linkedbyindex = {}; (i = 0; < graph.nodes.length; i++) {     linkedbyindex[i + "," + i] = 1; }; graph.links.foreach(function (d) {     linkedbyindex[d.source.index + "," + d.target.index] = 1; }); //this function looks whether pair neighbours function neighboring(a, b) {     return linkedbyindex[a.index + "," + b.index]; } 

but how use 1 selected node selected feature id?

i worked out answer:

d3.select("#nodeid")     .transition().duration(500)     .each(function(d){ //#nodeid selected             node.style("stroke-opacity", function(o) {                 thisopacity = isconnected(d, o) ? 1 : opacity;                 this.setattribute('fill-opacity', thisopacity);                 return thisopacity;             });             link.style("stroke-opacity", function(o) {                 return o.source === d || o.target === d ? 1 : opacity;             });          });  

i want display labels nodes display. suggestions?