Python+Selenium自动化测试九之JS操作

selenium并不是万能的，有时候页面上操作无法实现的，这时候就需要借助JS来完成了。

一、执行js代码

例如
from selenium import webdriver
import os


driver = webdriver.Chrome()
driver.get('https://www.baidu.com/')

jsCode = 'return document'
driver.execute_script(jsCode)

二、python对象与js代码混合使用(js占位符)

例如
driver = webdriver.Chrome()

driver.get('https://www.12306.cn/index/')

wait = WebDriverWait(driver, 30)
located = ['id', 'train_date']
train_date = wait.until(expected_conditions.presence_of_element_located(located))

# js 占位符 arguments
jsCode = """arguments[0].readOnly = false; arguments[0].value = '2022-06-03';"""
driver.execute_script(jsCode, train_date)
time.sleep(5)

driver.quit()

三、使用js操作滚动条

例如
driver = webdriver.Chrome()

driver.get('https://www.12306.cn/index/')

# js 操作滚动条
# 向下滚动100个px
# jsCode = """window.scrollTo(0, 100)"""
# 滚动到最底部
jsCode = """window.scrollTo(0, window.body.scrollHeight)"""
driver.execute_script(jsCode)

四、将元素滚动到可视范围内

例如
driver = webdriver.Chrome()

driver.get('https://www.12306.cn/index/')

# 等待找到元素
wait = WebDriverWait(driver, 10)
located = ['xpath', '//ul[@class="travel-train-list"]//li[1]//a']
elem = wait.until(expected_conditions.presence_of_element_located(located))

# 执行location_once_scrolled_into_view方法滚动到元素所在位置
elem.location_once_scrolled_into_view

time.sleep(5)

driver.quit()