Is it possible to execute script immediately after the page is navigated to?

[Vincent-Lin-UF]

Right now the await tab.go_to(url) seems to wait until the site is fully loaded. I need to invoke await tab.execute_script() immediately after the site has been navigated to. Is there anyway to do that?

[thalissonvs]

Hi, you can use a CDP command for that:

import asyncio
from pydoll.browser import Chrome
from pydoll.commands.page_commands import PageCommands


async def main():
    browser = Chrome()
    tab = await browser.start()
    await tab._execute_command(
        PageCommands.add_script_to_evaluate_on_new_document(
            source='''
            document.body.style.backgroundColor = 'red';
            ''',
            run_immediately=True,
        )
    )
    await tab.go_to('https://google.com/')


asyncio.run(main())

[thalissonvs]

There's also another way, using events:

import asyncio
from functools import partial
from pydoll.browser import Chrome
from pydoll.protocol.page.events import PageEvent


async def main():
    browser = Chrome()
    tab = await browser.start()
    await tab.enable_page_events()

    async def on_page_event(event, tab):
        # your script here
        await tab.execute_script("return document.title")  # noqa: F821

    await tab.on(PageEvent.LOAD_EVENT_FIRED, partial(on_page_event, tab))
    await tab.go_to('https://google.com/') # this will trigger the event and 
    # run the script immediately after the page is loaded

asyncio.run(main())

[Vincent-Lin-UF]

Thank you!