OptionalclassCSS class added to the button
Optionalcollapsableif the button can be moved to menu when the navbar is too small
Content of the button. Preferably a square image or SVG icon
Optionaldisabledinitial state of the button
OptionalidUnique identifier of the button, usefull when using the Navbar.getButton method
OptionalonFunction called when the button is clicked
Optionaltabbableif the button is accessible with the keyboard
OptionaltitleTooltip displayed when the mouse is over the button
If can be a key in the global lang config
Optionalvisibleinitial visibility of the button
Definition of a custom navbar button