Scroll End - Super Minimal

"""
These are all that's really needed to reproduce the Error.

Widgets get added via the add_to_screen which then should trigger scolling.
"""

from textual.app import App
from textual.containers import ScrollableContainer, Vertical
from textual.widgets import Static


class SimpleApp(App):
    MAIN = "main"
    CONTENT_WRAPPER = "wrapper"
    INSTRUCTIONS = "Press \[Enter] to add lines, 'c' to clear"

    def compose(self):
        yield ScrollableContainer(
            Vertical(id=self.MAIN),
            id=self.CONTENT_WRAPPER
        )

    async def add_to_screen(self, widget):
        # This is how widgets are added
        main = self.get_widget_by_id(self.MAIN)
        await main.mount(widget)
        await self.scroll_to_end()

    async def scroll_to_end(self):
        # This is the method used to scroll to the end
        container = self.get_widget_by_id(self.CONTENT_WRAPPER)
        container.scroll_end()