javascript - d3.js to remove two elements with matching attribute when clicked consecutively -

i have 2 elements identical href attributes. clicked, adding class. if, in addition, href of element clicked first equal href of element clicked second, filtered out.

  removebubble = function(d) {      var currentid;     currentid = idvalue(d);     d3.select(this).classed("clicked",true);    // on click add class    if (d3.selectall(".clicked").length === 2 && // 2 elements class clicked           d3.select(this).prev.attr("href") ===  // href of 1st elem           d3.select(this).next.attr("href"))     // href of 2nd elem           {          // filter here           }   }; 

the task: 1. check if elements clicked have matching href

how can achieve .prev() , .next() - jquery assessors - effect in d3.js ?

so far: uncaught typeerror: a.target.classname.indexof not function

here final working solution comments:

removebubble = function(d) {   var currentid;   currentid = idvalue(d);  // when clicked attach class    var clicked = d3.select(this).classed("clicked",true);   // ascribe href of elements class clicked variable    var clicktext = d3.selectall(".class1.clicked").attr("href");   var clicklabel = d3.selectall(".class2.clicked").attr("href");  // if no match remove class clicked , update // else remove elements , update     if ( clicklabel !== clicktext){      console.log("it's not match !");        d3.selectall(".clicked").classed("clicked",false);      update();      return d3.event.preventdefault();   } else {       console.log("its match !");       data = data.filter(function(e) {     return idvalue(e) !== currentid;     });  }   update();  return d3.event.preventdefault(); }; 

the point remove class used identify elements in case when 2 elements different href values clicked consecutively: remove class, update = start fresh.