navbar - Uncaught TypeError: Cannot call method 'split' of undefined

[Jon]

Using the layout template where I have the following markup

<div data-role="navbar">
    <a class="nav-button" data-align="left" data-transition="slide:left" data-role="backbutton">Back</a>
    <span data-role="view-title"></span>
    <a data-align="right" data-role="button" data-transition="slide:left" class="nav-button" href="#tabstrip-home">Home</a>
</div>

if you select the back button the first time the page loads you get Uncaught TypeError: Cannot call method 'split' of undefined - I guess as there is nothign to go back to, how can I disable this button until there is something to go back to?

[Petyo]

Hello,

Currently, the mobile button widget does not support enabling/disabling out of the box. The javascript error you experience will be addressed in our upcoming Q2 release. 

Regards,
Petyo
Telerik