--description--

The previous challenges covered how to display data from an array and how to add CSS classes. You can combine these lessons to create a simple bar chart. There are two steps to this:

Create a div for each data point in the array
Give each div a dynamic height, using a callback function in the style() method that sets height equal to the data value

Recall the format to set a style using a callback function:

selection.style('cssProperty', d => d);

--instructions--

Add the style() method to the code in the editor to set the height property for each element. Use a callback function to return the value of the data point with the string px added to it.

--hints--

The first div should have a height of 12 pixels.

assert.strictEqual(document.querySelectorAll('div')[0]?.style.height, '12px');

The second div should have a height of 31 pixels.

assert.strictEqual(document.querySelectorAll('div')[1]?.style.height, '31px');

The third div should have a height of 22 pixels.

assert.strictEqual(document.querySelectorAll('div')[2]?.style.height, '22px');

The fourth div should have a height of 17 pixels.

assert.strictEqual(document.querySelectorAll('div')[3]?.style.height, '17px');

The fifth div should have a height of 25 pixels.

assert.strictEqual(document.querySelectorAll('div')[4]?.style.height, '25px');

The sixth div should have a height of 18 pixels.

assert.strictEqual(document.querySelectorAll('div')[5]?.style.height, '18px');

The seventh div should have a height of 29 pixels.

assert.strictEqual(document.querySelectorAll('div')[6]?.style.height, '29px');

The eighth div should have a height of 14 pixels.

assert.strictEqual(document.querySelectorAll('div')[7]?.style.height, '14px');

The ninth div should have a height of 9 pixels.

assert.strictEqual(document.querySelectorAll('div')[8]?.style.height, '9px');

--seed--

--seed-contents--

html

<style>
  .bar {
    width: 25px;
    height: 100px;
    display: inline-block;
    background-color: blue;
  }
</style>
<body>
  <script>
    const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];

    d3.select('body')
      .selectAll('div')
      .data(dataset)
      .enter()
      .append('div')
      .attr('class', 'bar');
    // Add your code below this line



    // Add your code above this line
  </script>
</body>

--solutions--