21 lines
336 B
Markdown
21 lines
336 B
Markdown
---
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title: Add a Hover Effect to a D3 Element
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---
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## Add a Hover Effect to a D3 Element
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### Hint 1
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Add the ` bar ` class to all `rect ` elements.
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### Hint 2
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Use the ` attr() ` method to add attributes.
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### Solution
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Add the following line of code to the end of your ` rect ` methods chain:
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```javascript
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.attr("class","bar");
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```
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