如何使用D3更改（和转换）DIV高度？-HowcanIchange(andtransition)DIVheightsusingD3?

        function set_via_d3() {
            d3.select('#topdiv').transition().duration(500)
              .style('height', '100px');
            d3.select('#bottomdiv').transition().duration(500)
              .style('height', '300px').attr('display', 'inline-block');
        } 
        function reset_via_d3() {
            d3.select('#topdiv').transition().duration(500)
              .style('height', '390px');
            d3.select('#bottomdiv').transition().duration(500)
              .style('height', '10px').attr('display', 'none');
        }

        div { width: 300px; }
        div#outerdiv  { height: 500px; background-color: #fdf; }
        div#topdiv    { height: 400px; background-color: #dff; }
        div#bottomdiv { height: 0px;   background-color: #ffd; display: 'none' }

  
  
      

        

            Set
            Reset
        

        

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