---
schema_version: "1"
id: 2275f06c0bf2ffe1e4d5d8ceb9a81592a491d79eb17df6c7909fb6e968acad36
title: addClass()
collection: developer
version: current
locale: en-us
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canonical_url: https://developer.salesforce.com/docs/platform/aura-platform/guide/ref-jsapi-util-addclass.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: 8bb9aaac44cce80bbf0c9cd4de25f416772050e22ffed953de043add554c08fc
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  - Lightning Aura Components Developer Guide
  - Platform Developer Content
---

# addClass()

Adds a CSS class to a component.

## Signature

`addClass(Object element, String newClass)`

## Parameters

**_element_:** Type: `Object`. The component to apply the class on.

**_newClass_:** Type: `String`. The CSS class to be applied.

## Sample Code

```javascript
// find a component with aura:id="myCmp" in markup
var myCmp = component.find("myCmp");
$A.util.addClass(myCmp, "myClass");
```