freeCodeCamp/add-a-tooltip-to-a-d3-element.english.md at d25a4fcc4bad2f2227a1e43ad2ac18da653cbcf0

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Bouncey a859035023 fix(challenge-md): Fix quotes that failed in the transform

2018-10-08 11:38:26 +05:30

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id, title, required, challengeType

title

required

challengeType

587d7faa367417b2b2512bd6

Add a Tooltip to a D3 Element

src
https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.min.js

Description

A tooltip shows more information about an item on a page when the user hovers over that item. There are several ways to add a tooltip to a visualization, this challenge uses the SVG title element. title pairs with the text() method to dynamically add data to the bars.

Instructions

Append a title element under each rect node. Then call the text() method with a callback function so the text displays the data value.

Tests

tests:
  - text: Your code should have 9 <code>title</code> elements.
    testString: 'assert($("title").length == 9, "Your code should have 9 <code>title</code> elements.");'
  - text: The first <code>title</code> element should have tooltip text of 12.
    testString: 'assert($("title").eq(0).text() == "12", "The first <code>title</code> element should have tooltip text of 12.");'
  - text: The second <code>title</code> element should have tooltip text of 31.
    testString: 'assert($("title").eq(1).text() == "31", "The second <code>title</code> element should have tooltip text of 31.");'
  - text: The third <code>title</code> element should have tooltip text of 22.
    testString: 'assert($("title").eq(2).text() == "22", "The third <code>title</code> element should have tooltip text of 22.");'
  - text: The fourth <code>title</code> element should have tooltip text of 17.
    testString: 'assert($("title").eq(3).text() == "17", "The fourth <code>title</code> element should have tooltip text of 17.");'
  - text: The fifth <code>title</code> element should have tooltip text of 25.
    testString: 'assert($("title").eq(4).text() == "25", "The fifth <code>title</code> element should have tooltip text of 25.");'
  - text: The sixth <code>title</code> element should have tooltip text of 18.
    testString: 'assert($("title").eq(5).text() == "18", "The sixth <code>title</code> element should have tooltip text of 18.");'
  - text: The seventh <code>title</code> element should have tooltip text of 29.
    testString: 'assert($("title").eq(6).text() == "29", "The seventh <code>title</code> element should have tooltip text of 29.");'
  - text: The eighth <code>title</code> element should have tooltip text of 14.
    testString: 'assert($("title").eq(7).text() == "14", "The eighth <code>title</code> element should have tooltip text of 14.");'
  - text: The ninth <code>title</code> element should have tooltip text of 9.
    testString: 'assert($("title").eq(8).text() == "9", "The ninth <code>title</code> element should have tooltip text of 9.");'

Challenge Seed

<style>
  .bar:hover {
    fill: brown;
  }
</style>
<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);

    svg.selectAll("rect")
       .data(dataset)
       .enter()
       .append("rect")
       .attr("x", (d, i) => i * 30)
       .attr("y", (d, i) => h - 3 * d)
       .attr("width", 25)
       .attr("height", (d, i) => d * 3)
       .attr("fill", "navy")
       .attr("class", "bar")
       // Add your code below this line



       // Add your code above this line

    svg.selectAll("text")
       .data(dataset)
       .enter()
       .append("text")
       .text((d) => d)
       .attr("x", (d, i) => i * 30)
       .attr("y", (d, i) => h - (d * 3 + 3))

  </script>
</body>

Solution

// solution required

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