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The Coding Aviator 599b0ccdda Added solution to Add a Hover Effect to a D3 Element (#19606)
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* Update index.md
2018-10-17 22:12:38 +05:30

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