freeCodeCamp/add-a-tooltip-to-a-d3-element.english.md at 8f39bc12887a251fc7146e6d288de44ba279612f

gaspersic/freeCodeCamp

Fork 0

Bouncey 8f39bc1288 chore(curriculum): Remove files in wrong format

2018-10-05 15:58:12 +01:00

4.0 KiB

Raw Blame History

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

4.0 KiB Raw Blame History