Animating with d3.timer()

Using d3.timer() to animate a bouncing ball

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <link rel="stylesheet" href="style.css">
    <title>Animation with D3</title>
</head>
<body>
    <div id="vis"></div>
    <script src="script.js"></script>
</body>
</html>
​
    

Modified http://d3js.org/d3.v4.min.js to a secure url

https://d3js.org/d3.v4.min.js