vvvw/static/js/d3_map.js

var width = 700,
  height = 350

var svg = d3.select(".map_area").append("svg")
  .attr("width", width)
  .attr("height", height)
  .attr("viewBox", `${-width/1.7} ${-height/1.8} ${width*2.3} ${height*2.2}`);

var force = d3.layout.force()
  .gravity(0.008)
  .distance(190)
  .charge(-55)
  .size([width, height]);



d3.json("/static/js/group1.json", function(error, json) {
  if (error) throw error;

  force
    .nodes(json.nodes)
    .links(json.links)
    .start();

  var link = svg.selectAll(".link")
    .data(json.links)
    .enter().append("line")
    .attr("class", "link");


  var node = svg.selectAll(".node")
    .data(json.nodes)
    .enter().append("g")
    .attr("class", function(d) {
      return "node group" + d.group
    })
    .attr("id", function(d) {
      return d.id
    });

  node.append("image")
    // .attr("xlink:href", "/static/images/squig2.png")
    .attr("xlink:href", "/static/images/circle_blank.png")
    .attr("x", -8)
    .attr("y", -8)
    .attr("width", 16)
    .attr("height", 16);

  node.append("text")
    .attr("dx", 12)
    .attr("dy", ".35em")
    .text(function(d) {
      return d.name
    });



  var divVideo = d3.select("body").append("div").style("opacity", 1);
  var divBio = d3.select("body").append("div").style("opacity", 1);

  node.on({
      "mouseover": function(d) {
        d3.select(this).style("cursor", "pointer");
      }
    })
    .on("click", function(i) {
      // popup video
      // this is for next the this.parent... ;var video=document.getElementById('#video" + i.id + "');video.pause();
      console.log('vid')
      if (i.url) {
        divVideo.transition().duration(100);
        divVideo.html("<div class='draggable' id='showvideo'><span onclick=closevideo() class='topleft'> &nbsp; &times&nbsp;</span><iframe id='video" + i.id + "' width='300' height='150' src='" + i.url + "' frameborder='0' allow='accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture' allowfullscreen></iframe></div>");
      }else {
        $("#showvideo").hide()
    $('iframe').each(function(index) {
       $(this).attr('src', $(this).attr('src'));
       return false;});
  };
      divBio.transition().duration(100);
      divBio.html("<div class='draggable' id='showbio'><span onclick=closebio() class='topleft'> &nbsp; &times&nbsp;</span><div id='bio" + i.id + "'>" + i.bio + "</div>");
      popup(i.id, i.time);
    })
    .on("dblclick", connectedNodes)
    .call(force.drag);



  force.on("tick", function() {
    link.attr("x1", function(d) {
        return d.source.x;
      })
      .attr("y1", function(d) {
        return d.source.y;
      })
      .attr("x2", function(d) {
        return d.target.x;
      })
      .attr("y2", function(d) {
        return d.target.y;
      });

    node.attr("transform", function(d) {
      return "translate(" + d.x + "," + d.y + ")";
    });

  });

  // highlight NodeLists//Toggle stores whether the highlighting is on
  var toggle = 0;
  //Create an array logging what is connected to what
  var linkedByIndex = {};
  for (i = 0; i < json.nodes.length; i++) {
    linkedByIndex[i + "," + i] = 1;
  };
  json.links.forEach(function(d) {
    linkedByIndex[d.source.index + "," + d.target.index] = 1;
  });
  //This function looks up whether a pair are neighbours
  function neighboring(a, b) {
    return linkedByIndex[a.index + "," + b.index];
  }

  function connectedNodes() {
    if (toggle == 0) {
      //Reduce the opacity of all but the neighbouring nodes
      d = d3.select(this).node().__data__;
      node.style("opacity", function(o) {
        return neighboring(d, o) | neighboring(o, d) ? 1 : 0.1;
      });
      link.style("opacity", function(o) {
        return d.index == o.source.index | d.index == o.target.index ? 1 : 0.1;
      });
      //Reduce the op
      toggle = 1;
    } else {
      //Put them back to opacity=1
      node.style("opacity", 1);
      link.style("opacity", 1);
      toggle = 0;
    }
  }
  //end highlight nodes


  function popup(name, time) {
    $("#show" + name).fadeIn()
    console.log("around")
    $("#nothesis").fadeIn()
    $("#thesis").fadeIn()
    $("#closeall").fadeIn()
    $("#bio" + name).fadeIn()
    var dada = document.getElementById("text" + name);
    if (dada){
   dada.className += " active";
   dada.scrollIntoView({ behavior: 'smooth', block: 'nearest', inline: 'nearest' });
    }
    else{
      begin=document.getElementById("beginning");
      begin.scrollIntoView({ behavior: 'smooth', block: 'nearest', inline: 'nearest' });
      //    old=document.getElementsByClassName("active");
      // var lengthOfArray=old.length;

      // for (var i=0; i<lengthOfArray;i++){
      //     old[i].style.display='none';}
          }
    
  };

});