event

<!DOCTYPE html>
<meta charset = "utf-8">
<body>
    <svg height="500">
        <rect transform="translate(100, 100)" width="50" height="50"></rect>
    </svg>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.3/d3.min.js"></script>
    <script>

    // 이곳부터 작성

    </script>
</body>