javascript - Draw in a SVG that was already drawn -

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i want know if it's possible , how draw in drawn svg. let's i've drawn svg something, want add element, without draw again map or modify original cod.

yes, can done. actually, 1 of advantages of svg. here example:

<!doctype html> <html>     <head>         <title>html5 svg demo</title>     </head>      <body>         <h1>svg demo</h1>         <svg id="circle" height="200" xmlns="http://www.w3.org/2000/svg">         <circle id="greencircle" cx="30" cy="30" r="30" fill="green" />         </svg>            <script type="text/javascript">              var rect = document.createelementns('http://www.w3.org/2000/svg', 'rect');             rect.setattributens(null,"id", "myrect");             rect.setattributens(null,"fill", "red");             rect.setattributens(null,"stroke", "black");             rect.setattributens(null,"stroke-width", "5");             rect.setattributens(null,"x", "100");             rect.setattributens(null,"y", "100");             rect.setattributens(null,"width", "100");             rect.setattributens(null,"height", "50");             var svg = document.getelementbyid("circle");             svg.appendchild(rect);           </script>     </body> </html>

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