Version: 6.12.2

Button Options

const options = {
  topBar: {
    leftButtons: [
      {
        id: 'id',
        text: 'Button',
      },
    ],
  },
};

This option will set whether characters are all capitalized or not.

Type	Required	Platform	Default
boolean	No	Android	true

If the button has text, this option is used to set font size in DP.

Type	Required	Platform
number	No	Both

Buttons are identified by their id property. When a button is clicked, a buttonPress event is emitted to js, containing the id of the clicked button.

Type	Required	Platform
string	Yes	Both

Button icon. If the button is pushed to the overflow menu, the button text is used instead.

Type	Required	Platform
number	No	Both

Button text. Ignored if an icon is specified, unless the button is displayed in the overflow menu.

Type	Required	Platform
string	No	Both

Type	Required	Platform
enum('always', 'never', 'withText', 'ifRoom')	No	Android

ifRoom - Only add button to the TopBar if there is room for it, otherwise add it to the overflow menu.
never - Never place this button in the TopBar. Instead, list the button in the overflow menu.
always - Always place this button in the app bar.

Set a react component as this button's view which will be displayed instead of the regular view.

Type	Required	Platform
Component	No	Both

IconInsets are applied to the icon to translate its original position on the screen.

Type	Required	Platform
IconInsets	No	iOS

System icon; ignored if an icon is specified. For more information, see apple's guidelines.

Type	Required	Platform
enum('done', 'cancel', 'edit', 'save', 'add', 'flexibleSpace', 'fixedSpace', 'compose', 'reply', 'action', 'organize', 'bookmarks', 'search', 'refresh', 'stop', 'camera', 'trash', 'play', 'pause', 'rewind', 'fastForward', 'undo', 'redo')	No	iOS