BarChartD3DataJoin_Workshop_3-2019

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>Second Bar Chart Using D3 AND Data Joins!</title>
    <style>
      svg {
        border: 1px solid #f0f;
      }
        /* Set `rect` elements to have a "fill" of "purple" or whatever color you choose */

rect {
            fill: purple;
        }
    </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.
var 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 Bar Chart"
div.append('p').text('My Bar Chart')
  
// - Append a container `svg` to your `div` element in which you'll place your rectangles     
// - Set your svg's `width` to 300, and `height` to `400` 
var svg = div.append('svg')
    .attr('width', 300)
    .attr('height', 400)

// 1) Append 3 `rect` elements inside of your `<svg>` (one at a time), setting the properties for each one. We'll improve on this process later: 
//     - `x`: How far to move the rectangle in the `x` direction (right). Should be `0` for all rectangles. 
//     - `y`: How for to move the rect in the `y` direction (down from the top). Should be `10`, `40` `70` 
//     - `width`: How far to draw the rectangle to the right. Should be `100`,`200`, `300` 
//     - `height`: The vertical height of each rectangle. Should be `20` for all rectangles

// This is the dataset to drive the layout:
var data = [{
        y: 10,
        width: 100
    },
    {
        y: 40,
        width: 200
    },
    {
        y: 70,
        width: 300
    },
];

var rects = svg.selectAll('rect')
	.data(data)
	.enter().append('rect')
	.attr('x', 0)
	.attr('height', 20)
	.attr('y', function(d) { return d.y })
  .attr('width', function(d) { return d.width})

</script>

</html>

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