Textual Reactive Programming

Purpose

Implement efficient, declarative data binding in Textual widgets using reactive attributes. This pattern eliminates manual refresh calls and ensures UI stays synchronized with state.

Quick Start

from textual.reactive import reactive
from textual.widgets import Static

class CounterWidget(Static):
    """Widget with reactive counter."""

    count = reactive(0)  # Reactive attribute initialized to 0

    def render(self) -> str:
        """Auto-called when count changes."""
        return f"Count: {self.count}"