Textual App Lifecycle

Purpose

Understand and implement proper Textual application lifecycle patterns including initialization, mounting, screen management, background workers, and graceful shutdown. This is the foundation for building robust TUI applications.

Quick Start

from textual.app import App, ComposeResult
from textual.binding import Binding
from textual.widgets import Header, Footer, Static
from typing import ClassVar

class MyApp(App):
    """Minimal Textual application with proper lifecycle."""

    TITLE = "My Application"
    SUB_TITLE = "Powered by Textual"