# 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