[feature request] `driver.execute_async_script` alternative

[milahu]

currently, driver.execute_async_script only provides
a resolve function in arguments[arguments.length - 1]

Selenium-Driverless/src/selenium_driverless/types/deserialize.py

Lines 226 to 244 in 5f56548

         if exec_context and obj_id: 
             args = [self, *args] 
             script = """ 
                 (function(...arguments){ 
                     const obj = arguments.shift() 
                     const promise = new Promise((resolve, reject) => { 
                                           arguments.push(resolve) 
                         });""" + script + ";return promise})" 
         else: 
             script = """(function(...arguments){ 
                                    const obj = this 
                                    const promise = new Promise((resolve, reject) => { 
                                           arguments.push(resolve) 
                                     });""" + script + ";return promise})" 
         res = await self.__exec_raw__(script, *args, max_depth=max_depth, 
                                       serialization=serialization, timeout=timeout, 
                                       await_res=True, 
                                       execution_context_id=exec_context) 
         return res 

this is compatible with selenium execute_async_script
but... i dont see a way to throw an error from javascript
so currently, on error, i have to wait for the CDP timeout

---

the tests are a bit confusing, as they use resolve = arguments[0]

$ grep -r -w -h execute_async_script tests/
    async_token = await driver.execute_async_script('window.getAsyncToken().then(arguments[0])')
    async_token = driver.execute_async_script('window.getAsyncToken().then(arguments[0])')
        async_token = await driver.execute_async_script('window.getAsyncToken().then(arguments[0])')

[kaliiiiiiiiiii]

ah yep indeed.
I thought of that as well.
My plan is to provide another method with smth like:

script = """(async function(...arguments){ 
       const obj = this;""" + script + ")" 

Haven't tested if that actually works yet tho.

[kaliiiiiiiiiii]

Smth like the following will be supported.
Like it way more than execute_async_script

import asyncio
from selenium_driverless import webdriver


async def main():
    options = webdriver.ChromeOptions()
    options.add_arguments(
        "--disable-web-security",  # disable CORS
        "--headless=new")
    async with webdriver.Chrome(options=options) as driver:
        url = "https://httpbin.org/get"
        window = await driver.execute_script("return window")
        res = await window.__eval_async__('''
                res = await fetch(arguments[0]);
                json = await res.json()
                return json
            ''', url)
        print(dict(**res.headers))


asyncio.run(main())