# Blur
While technically not a transform, blur can be used to unblur elements when they appear or blur them when they disappear.
> [!NOTE]
> You also need to apply [`animate-in`][Animate_in] or [`animate-out`][Animate_out] classes respectively.
## `blur-in-*`
| Class |
Styles |
|
`blur-in`
|
```css
--tw-enter-blur: 20px;
```
|
|
`blur-in-`
|
```css
--tw-enter-blur: calc( * 1px);
```
|
|
`blur-in-()`
|
```css
--tw-enter-blur: var();
```
|
|
`blur-in-[]`
|
```css
--tw-enter-blur: ;
```
|
## `blur-out-*`
| Class |
Styles |
|
`blur-out`
|
```css
--tw-exit-blur: 20px;
```
|
|
`blur-out-`
|
```css
--tw-exit-blur: calc( * 1px);
```
|
|
`blur-out-()`
|
```css
--tw-exit-blur: var();
```
|
|
`blur-out-[]`
|
```css
--tw-exit-blur: ;
```
|
[Animate_in]: ../animations/in-out.md#animate-in
[Animate_out]: ../animations/in-out.md#animate-out