The toolbar is essential UI component in the Admin Console. It's used to provide quick access to most used functions on the screen.
Buttons of following types can be placed on toolbar:
- regular - image with a text below it (text can be hidden system-wide via setting), that have hover effects and be disabled (greyed out effect)
- separator - vertical bar image, that can be used to group several buttons together
- custom - button, that don't have any standard look, that allows developer placing HTML of his choosing inside it
Regardless of type each toolbar button can also be shown/hidden in real time.
Unfortunately attempt to show/hide the "custom" type toolbar button results in "this.Container is undefined" JavaScript error.
Solution
Don't use custom toolbar button HTML, provided by developer, as-is, but instead wrap it with a container DIV that is essential for proper toolbar operations.