Errors with web-application on Python and JS [closed]

I have such a code. I’m developing weather app using JS and Python eel. There are two problems:
First one:

Uncaught (in promise) TypeError: eel.get_city is not a function

Second one:

Uncaught SyntaxError: missing ] after element list note: [ opened at line 1, column 0

Also I have problems with translating of page in browsers no-Mozilla families.

html


<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="eel.js"></script>
<title>
IWeather
</title>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="main.css">
<script type="text/javascript" src='eel.js'></script>
</head>
<body>

    <div id='header'>
        <img src="source/logo_file2.png">
    
        <script type="text/javascript">

function getLang() {
lang = document.getElementById('lang');
lang = lang.value;
if (lang == null) {
return 'RU'
}
return lang;

}

function translate(arg) {
let strings_ru = {
getWeather : 'Узнать погоду',
placeholder : 'Введите город',
};
let strings_eng  = {
getWeather : 'Show me weather',
placeholder : 'Type a city',
};
let current_lang = getLang();

    switch(arg) {
    case "RU":
        button = document.getElementById('getWeather');
        placeholder = document.getElementById('city');
    
        button.innerHTML = strings_ru.getWeather;
        placeholder.placeholder = strings_ru.placeholder;
    
        break;
    case "EN":
        button = document.getElementById('getWeather');
        placeholder = document.getElementById('city');
    
        button.innerHTML = strings_eng.getWeather;
        placeholder.placeholder = strings_eng.placeholder;
    
        break;  
    };

}

        </script>
        <select id='lang' onchange=" getLang(); current_lang = getLang(); translate(current_lang);">
        <option value='RU' selected>RU</option>
        <option value='EN'>EN</option>
    </select>
    </div>
    </br>
    
    <input type="" name="" placeholder="Введите город" id="city">
    <button id='getWeather'>Узнать погоду</button>
    <script type="text/javascript">

let user_browser = navigator.userAgent;

if (user_browser.includes('Mozilla')) {
//alert(1);
}else{
alert('Your browser is not supported. Try Firefox, please...');
}

async function send_data(id) {
let data = document.getElementById(id);
data = data.value;

    let result = await eel.get_city(data);
    document.getElementById('output').innerHTML = result;

}

button = document.getElementById('getWeather');
button.setAttribute('onclick', send_data('city'));

    </script>   
    
    <div id="stk"></div>
    <img src="source/Cloud2.png" id="cloud1">
    <img src="source/Cloud1.png" id="cloud2">
    <img src="source/sun3.png" id="sun">
    <div id='output'>
        
    </br>
    </br>
    </div>

</body>
</html>

Python


import eel
from pyowm.owm import OWM
from pyowm.utils.config import get_default_config

config_dict = get_default_config()
config_dict['language'] = 'ru'

eel.init("WEB")

config_dict = get_default_config()
config_dict['language'] = 'ru'
owm = OWM('4a8dd7de2f8871115d7fd34ff9785ab1', config_dict)


# Connected and initialized. Doesn't work in browser, on another level
def get_weather(arg):
    mgr = owm.weather_manager()

    observation = mgr.weather_at_place(str(arg))
    weather = observation.weather

    det_st = weather.detailed_status

    wind = weather.wind()
    wind = str(wind['speed']) + ' m/s'

    temp_current = weather.temperature('celsius')

    temp_max = int(temp_current['temp_max'])
    temp_min = int(temp_current['temp_min'])
    temp_current = int(temp_current['temp'])

    temp_list = [temp_current, temp_min, temp_max]

    sunrise = weather.sunrise_time('iso')
    sunrise = sunrise[11:-9]
    sunset = weather.sunset_time('iso')
    sunset = sunset[11:-9]

    sun_data = [sunrise, sunset]
    return [det_st, wind, temp_list, sun_data]


eel.start("main.html", size=(700, 400), mode='default')


@eel.expose
def get_city(city_js):
    city = city_js
    return get_weather(city)


# print(get_weather())


# default "FireFox" recommended

I tried to change position of strings in Python code, especially “eel.start()” string, but there are no results at all… Also I grouped JS code intu script tags staight above DOM elements, that will be used in a script. Mistakes and problems haven’t gone…