Title: html5 validator error
Last modified: May 21, 2018
---
# html5 validator error
* Resolved [Barton](https://wordpress.org/support/users/thebarton/)
* (@thebarton)
* [8 years ago](https://wordpress.org/support/topic/html5-validator-error-2/)
* I’m getting a validation error with the html validator when using mobile menu
plugin.
* Here’s the error:
* Error: CSS: transition: 0 is not a transition value.
* At line 494, column 31
* (assuming the line numbers aren’t very accurate for you)
* Here’s the code:
* /* Adds a transition and the resting translate state */↩
.mob-menu-slideout .
mobmenu-push-wrap, .mob-menu-slideout .mob-menu-header-holder {↩ ↩ -webkit-transition:
all 300ms ease 0;↩ -moz-transition: all 300ms ease 0;↩ -o-transition: all 300ms
ease 0;↩ transition: all 300ms ease 0;↩
* Note the 0.
Viewing 4 replies - 1 through 4 (of 4 total)
* Plugin Author [Rui Guerreiro](https://wordpress.org/support/users/takanakui/)
* (@takanakui)
* [8 years ago](https://wordpress.org/support/topic/html5-validator-error-2/#post-10305834)
* Thanks for the heads up. That’s definitely wrong it should be this rules instead.
* ```
-webkit-transition: -webkit-transform .5s;
-moz-transition: -moz-transform .5s;
-ms-transition: -ms-transform .5s;
-o-transition: -o-transform .5s;
transition: transform .5s;
```
* Will fix it for the next update to release in a couple weeks. Can you change
it for now?
* Thanks
* Plugin Author [Rui Guerreiro](https://wordpress.org/support/users/takanakui/)
* (@takanakui)
* [8 years ago](https://wordpress.org/support/topic/html5-validator-error-2/#post-10331441)
* [@thebarton](https://wordpress.org/support/users/thebarton/)
Did you managed
to test my code suggestion?
* Thanks
* Thread Starter [Barton](https://wordpress.org/support/users/thebarton/)
* (@thebarton)
* [8 years ago](https://wordpress.org/support/topic/html5-validator-error-2/#post-10332768)
* I have not, but I can wait until there’s a plugin update from WordPress. Thank
you, I appreciate it.
* Plugin Author [Rui Guerreiro](https://wordpress.org/support/users/takanakui/)
* (@takanakui)
* [8 years ago](https://wordpress.org/support/topic/html5-validator-error-2/#post-10347383)
* Thanks, Probably next week the new update will be released.
Viewing 4 replies - 1 through 4 (of 4 total)
The topic ‘html5 validator error’ is closed to new replies.
* 
* [WP Mobile Menu - The Mobile-Friendly Responsive Menu](https://wordpress.org/plugins/mobile-menu/)
* [Frequently Asked Questions](https://wordpress.org/plugins/mobile-menu/#faq)
* [Support Threads](https://wordpress.org/support/plugin/mobile-menu/)
* [Active Topics](https://wordpress.org/support/plugin/mobile-menu/active/)
* [Unresolved Topics](https://wordpress.org/support/plugin/mobile-menu/unresolved/)
* [Reviews](https://wordpress.org/support/plugin/mobile-menu/reviews/)
* 4 replies
* 2 participants
* Last reply from: [Rui Guerreiro](https://wordpress.org/support/users/takanakui/)
* Last activity: [8 years ago](https://wordpress.org/support/topic/html5-validator-error-2/#post-10347383)
* Status: resolved