Question

如何根据月份的变化从控制台中获取销售价值，我希望数据应该影响我的数据这是我的选择框：

<select id="months">
  <option value="">Select</option>
  <option value="nov">NOV</option>
  <option value="dec">DEC</option>
  <option value="jan">JAN</option>
</select>

这是JavaScript

  function sales(booked, total) {
    this.booked = booked;
    this.total = total;
  };

  sale = new sales(8, 12) ;

  $("#months").on('change', function(){
    mons = $(this).val();
    console.log(mons);

    if(mons == "nov"){
      sale = new sales(1,12) ;
    }

    if(mons == "dec"){
      sale = new sales(2,12) ;
    }

    if(mons == "jan"){
      sale = new sales(15,12) ;
    }   
    console.log(sale.booked +' ' +sale.total);
  });

  console.log(sale.booked +' ' +sale.total);



  var w = 400;
  var h = 400;
  var r = h/2;
  var color = d3.scale.category20c();

  data = [{"label":"booked " + sale.booked, "value": sale.booked}, 
                    {"label": "total " + sale.total, "value": sale.total}];

  var vis = d3.select('#chart').append("svg:svg").data([data]).attr("width", w).attr("height", h).append("svg:g").attr("transform", "translate(" + r + "," + r + ")");
  var pie = d3.layout.pie().value(function(d){return d.value;});

  // declare an arc generator function
  var arc = d3.svg.arc().outerRadius(r);

  // select paths, use arc generator to draw
  var arcs = vis.selectAll("g.slice").data(pie).enter().append("svg:g").attr("class", "slice");
  arcs.append("svg:path")
      .attr("fill", function(d, i){
          return color(i);
      })
      .attr("d", function (d) {
          // log the result of the arc generator to show how cool it is :)
          //console.log(arc(d));
          return arc(d);
      });

我想根据此月份选择框的更改来更改var数据的值，我试图通过这个，但在月更改功能的范围内，它工作正常，价值观正在改变，但外面我不能得到这种变化。我怎么能得到它。

JSON属性值在事件上发生变化并将其全局化

0 个答案: