Scatter3_D3DataJoin_Complete

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>My D3 Data Join Scatter</title>
    <style>
        /* Set `circle` elements to have a "fill" of "purple" or whatever color you choose */

circle {
            fill: purple;
        }
      svg {
        border: 1px solid #f0f;
      }
    </style>
    
    <script src="https://d3js.org/d3.v4.min.js"></script>
</head>

<body>
</body>
<script type="text/javascript">
// - Select your `body` and append a `div` element in which you'll render your content. To do this, you'll use the `d3.select()` method, and then the `.append()` method to append your element to your selection.
const div = d3.select('body').append('div');
  
// - Append a new `p` element to the `div` you just created, and use the `.text()` method to set the text to "MY D3 Data Join Scatter"
div.append('p').text('My D3 Data Join Scatter')
  
// - Append a container `svg` to your `div` element in which you'll place your circles     
// - Set your svg's `width` to 300, and `height` to `400` 
const svg = div.append('svg')
    .attr('width', 300)
    .attr('height', 400)

// 1) Append 3 `circle` elements inside of your `<svg>` (one at a time), setting the properties for each one. We'll improve on this process later: 
// - `cx`: How far to move the circle in the `x` direction (right). Should be 100, 150, and 200. 
// - `cy`: How for to move the circle in the `y` direction (down from the top). Should be 100, 150, and 200. 
// - 'r': circle's radius. Should be 10, 15, and 20.

// This is the dataset to drive the layout:
const dataPoints = [{
        cx: 100,
        cy: 100,
        r: 10
    },
    {
        cx: 150,
        cy: 150,
        r: 15
    },
    {
        cx: 200,
        cy: 200,
        r: 20
    },
];

// New code here:
  
const circles = svg.selectAll('circle')
  .data(dataPoints)
  .enter().append('circle')
  .attr('cx', function(d) { return d.cx})
  .attr('cy', function(d) { return d.cy})
  .attr('r', function(d) { return d.r })
  
</script>

</html>

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