TextArea size on mount

[lyovushka]

When I mount a TextArea, for a split second it has a larger size before snapping to the intended size. Here is a code to illustrate the behaviour:

from textual.app import App
from textual.widgets import Button, TextArea

TEXT = "Lorem ipsum dolor sit amet"


class TestApp(App):
    CSS = """
TextArea {
    height: auto;
}

    """

    def on_button_pressed(self):
        self.mount(TextArea(TEXT), after=0)

    def compose(self):
        yield Button()


TestApp().run()

When pressing the button you can see that for a split second every character or TEXT is rendered in a new line before it is collapsed to a single line.

How can this behaviour be avoided?

[TomJGooding]

This looks like a bug to me - hope you don't mind but seemed worth creating an issue:

• TextArea has initial flicker with each character on a new line #5841

[lyovushka]

Makes sense. Thanks for opening the issue. I'll close this one.