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freeCodeCamp/guide/english/certifications/data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element/index.md
Randell Dawson 1494a50123 fix(guide): restructure curriculum guide articles (#36501) 
* fix: restructure certifications guide articles
* fix: added 3 dashes line before prob expl
* fix: added 3 dashes line before hints
* fix: added 3 dashes line before solutions
2019-07-24 13:29:27 +05:30

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title
title
Add a Tooltip to a D3 Element

Add a Tooltip to a D3 Element

Hints

Hint 1

Use the .append() method.

Hint 2

Use the .text() method.

Hint 3

Chain the .append() and .text() methods.

Hint 4

Use a callback function in the .text() method.

Solutions

Solution 1 (Click to Show/Hide)

Chain the following lines of code with your svg.selectAll("rect") method.

  .append("title")
  .text(d=>d);