Disable Nav bar when keyboard is visible

I'm having trouble disabling the Bottom Tab Bar when keyboard is visible. I want to do so from Website Overrides > Custom Javascript so that I don't have to make any changes to the website.

I did research and tried using the below but it's not working:

median.keyboard.listen(function (keyboardState) { if (keyboardState.visible) { // Hide the tab navigation when keyboard is visible median.tabNavigation.setTabs({ enabled: false }); } else { // Show the tab navigation when keyboard is hidden median.tabNavigation.setTabs({ enabled: true }); } });

Can anyone help?