D3.js datum()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>
   </head>

   <body>
      <p></p>
      <div></div>
      <script>
         d3.select("p")
         .datum(50)
         .text(function(d) { 
            return "Used existing paragraph element and the data " + d + " is assigned."; 
         });

         d3.select("div")
         .datum(100)
         .append("p")
         .text(function(d) { 
            return "Created new paragraph element and the data " + d + " is assigned."; 
         });
      </script>
   </body>
</HTML>

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