D3.js remove()用法

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1970-01-01

!DOCTYPE htmlhtmlheadscript type = text/javascript src = https://d3js.org/d3.v4.min.js/script

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<!DOCTYPE HTML>
<HTML>
   <head>
      <script type = "text/JavaScript" src = "https://d3Js.org/d3.v4.min.Js"></script>
      <style>
         body { Font-family: Arial; }
      </style>
   </head>

   <body>
      <ul ID = "List">
         <li></li>
         <li></li>
      </ul>

      <input type = "button" name = "remove" value = "Remove fourth value" 
         onclick = "JavaScript:remove()" />

      <script>
         d3.select("#List").selectAll("li")
            .data([10, 20, 30, 25, 15])
            .text(function(d) 
               { return "This is pre-existing element and the value is " + d; })
            .enter()
            .append("li")
            .text(function(d) 
               { return "This is dynamically created element and the value is " + d; });

         function remove() {
            d3.selectAll("li")
            .data([10, 20, 30, 15])
            .exit()
            .remove()
         }
      </script>
   </body>
</HTML>

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