freeCodeCamp/display-shapes-with-svg.english.md at 1f2b66a432a24cc06c0ce74762e467777885a807

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2020-04-24 06:34:53 -05:00

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Raw Blame History

id, title, challengeType, forumTopicId

id	title	challengeType	forumTopicId
587d7fa8367417b2b2512bcc	Display Shapes with SVG	6	301485

Description

The last challenge created an svg element with a given width and height, which was visible because it had a background-color applied to it in the style tag. The code made space for the given width and height. The next step is to create a shape to put in the svg area. There are a number of supported shapes in SVG, such as rectangles and circles. They are used to display data. For example, a rectangle (<rect>) SVG shape could create a bar in a bar chart. When you place a shape into the svg area, you can specify where it goes with x and y coordinates. The origin point of (0, 0) is in the upper-left corner. Positive values for x push the shape to the right, and positive values for y push the shape down from the origin point. To place a shape in the middle of the 500 (width) x 100 (height) svg from last challenge, the x coordinate would be 250 and the y coordinate would be 50. An SVG rect has four attributes. There are the x and y coordinates for where it is placed in the svg area. It also has a height and width to specify the size.

Instructions

Add a rect shape to the svg using append(), and give it a width attribute of 25 and height attribute of 100. Also, give the rect x and y attributes each set to 0.

Tests

tests:
  - text: Your document should have 1 <code>rect</code> element.
    testString: assert($('rect').length == 1);
  - text: The <code>rect</code> element should have a <code>width</code> attribute set to 25.
    testString: assert($('rect').attr('width') == '25');
  - text: The <code>rect</code> element should have a <code>height</code> attribute set to 100.
    testString: assert($('rect').attr('height') == '100');
  - text: The <code>rect</code> element should have an <code>x</code> attribute set to 0.
    testString: assert($('rect').attr('x') == '0');
  - text: The <code>rect</code> element should have a <code>y</code> attribute set to 0.
    testString: assert($('rect').attr('y') == '0');

Challenge Seed

<body>
  <script>
    const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];

    const w = 500;
    const h = 100;

    const svg = d3.select("body")
                  .append("svg")
                  .attr("width", w)
                  .attr("height", h)
                  // Add your code below this line



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

Solution

<body>
  <script>
    const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];

    const w = 500;
    const h = 100;

    const svg = d3.select("body")
                  .append("svg")
                  .attr("width", w)
                  .attr("height", h)
                  .append("rect")
                  .attr("width", 25)
                  .attr("height", 100)
                  .attr("x", 0)
                  .attr("y", 0);
  </script>
</body>

3.5 KiB Raw Blame History