wezterm/docs/config/lua/window/perform_action.md

window:perform_action(key_assignment, pane)

Since: nightly builds only

Performs a key assignment against the window and pane. There are a number of actions that can be performed against a pane in a window when configured via the keys and mouse configuration options.

This method allows your lua script to trigger those actions for itself.

The first parameter is a key assignment such as that returned by wezterm.action.

The second parameter is a pane object passed to your event callback.

For an example of this method in action, see wezterm.on Custom Events.