Components are the building blocks for your app's user interface (UI). They are the visual elements that make up your app, like buttons, text, and images.

Components are made up of children and props.

Let's take a look at the rx.text component.

rx.text("Hello World!", color="blue", font_size="1.5em")

Here "Hello World!" is the child text to display, while color and font_size are props that modify the appearance of the text.

Now let's take a look at a more complex component, which has other components nested inside it. The rx.hstack component is a container that arranges its children horizontally.

rx.hstack(
    # Static 50% progress
    rx.chakra.circular_progress(
        rx.chakra.circular_progress_label(
            "50", color="green"
        ),
        value=50,
    ),
    # "Spinning" progress
    rx.chakra.circular_progress(
        rx.chakra.circular_progress_label(
            "∞", color="rgb(107,99,246)"
        ),
        is_indeterminate=True,
    ),
)

Some props are specific to a component. For example, the value prop of the rx.chakra.circular_progress component controls the progress bar's value.

Styling props like color are shared across many components.

Reflex apps are organized into pages. Pages link a specific URL route to a component.

You can create a page by defining a function that returns a component. By default, the function name will be used as the path, but you can also specify a path explicitly.

def index():
    return rx.text("Root Page")


def about():
    return rx.text("About Page")


app = rx.App()
app.add_page(index, route="/")
app.add_page(about, route="/about")

In this example we add a page called index at the root route. If you reflex run the app, you will see the index page at http://localhost:3000. Similarly, the about page will be available at http://localhost:3000/about.