Some useful keyboard navigations shortcuts

In left-menu expanded state,

• UP/DOWN ARROW — navigate through the list.
• LEFT/RIGHT ARROW — focus the mini-bar and left-menu respectively.

In left-menu collapsed state,

• LEFT/RIGHT ARROW — temporarily opens the left-menu for navigation

In both the above views,

• ENTER — selects the currently focused item.
  • If item is an icon in mini-bar, open the associated left-menu
  • If item is a channel in left-menu, load the corresponding channel

In Overall UI

• ESC — toggle between input textarea, chat area and navigation area focus.
  • If focus is in a channel message input, then ESC should move the focus to input textarea.
• CTRL+S — Focus the search input
• CTRL+SHIFT+LEFT ARROW — toggle left-menu

In Chat area focus mode

• UP/DOWN ARROW — scroll through chat messages

In Input area focus mode

• Refer gitterHQ/gitter#1157
• Refer gitterHQ/gitter#1158

Temporarily highlight/flash the focused area while using keyboard only focus navigation.