掌握JavaScript操作滚动条

selenium执行javascript脚本：
webdriver有两个方法来执行javascript，分别是：
-execute_script 同步执行
-execute_async_script异步执行
通过js通常可以实现页面滚动

code:

from selenium import webdriver
from time import sleep

class TestCase(object):
    def __init__(self):
        self.driver = webdriver.Chrome()
        self.driver.get('http://www.baidu.com')
    def test1(self):
        self.driver.execute_script("alert('test')")
        sleep(2)
        self.driver.switch_to.alert.accept()
    def test2(self):
        js = 'return document.title'
        title = self.driver.execute_script(js)
        print(title)
    def test3(self):
        js = 'var q = document.getElementById("kw"); q.style.border="2px solid red"'
        self.driver.execute_script(js)
    def test4(self):
        self.driver.find_element_by_id('kw').send_keys('selenium')
        self.driver.find_element_by_id('su').click()
        sleep(2)
        #滚动到底部
        js = 'window.scrollTo(0,document.body.scrollHeight)'
        self.driver.execute_script(js)
        sleep(2)

if __name__=='__main__':
    case = TestCase()
    case.test4()