Console capture

Set debugging_enabled=True on the Flet control to forward page console messages to the platform debug log.

Warning

Avoid uploading page content or sensitive console values without user consent.

Receiving console messages in Python

Python applications can receive console messages as typed Flet events:

def console_message(e):
    print(f"[{e.level}] {e.message}")

webview = FletWebviewAll(
    url="https://example.com",
    on_console_message=console_message,
)

debugging_enabled=True continues to print messages through the platform debug log; on_console_message is useful when the Python app needs to display or record them.

Web platform limits

On Web, cross-origin iframe content cannot be scripted by the host. APIs such as JavaScript evaluation, channels, console hooks, and scroll reads/writes require same-origin content or plugin-managed isolated HTML.

See Debugging & DevTools for full DevTools access per platform, and Events for the on_console_message event signature.