本文是小编为大家收集整理的关于在Selenium/PhantomJS上执行Javascript的处理/解决方法，可以参考本文帮助大家快速定位并解决问题，中文翻译不准确的可切换到English标签页查看源文。
问题描述
我正在使用Python的Selenium Webdriver使用PhantomJS，我正在尝试在页面上执行一块JavaScript，以期返回一块数据:
from selenium import webdriver
driver = webdriver.PhantomJS("phantomjs.cmd") # or add to your PATH
driver.set_window_size(1024, 768) # optional
driver.get('http://google.com') # EXAMPLE, not actual URL
driver.save_screenshot('screen.png') # save a screenshot to disk
jsres = driver.execute('$("#list").DataTable().data()')
print(jsres)
但是，运行时，它报告KeyError.我找不到有关可用命令的文档，所以我有点在这里.
推荐答案
问题描述
I'm using PhantomJS via Selenium Webdriver in Python and I'm trying to execute a piece of JavaScript on the page in hopes of returning a piece of data:
from selenium import webdriver
driver = webdriver.PhantomJS("phantomjs.cmd") # or add to your PATH
driver.set_window_size(1024, 768) # optional
driver.get('http://google.com') # EXAMPLE, not actual URL
driver.save_screenshot('screen.png') # save a screenshot to disk
jsres = driver.execute('$("#list").DataTable().data()')
print(jsres)
However when run, it reports KeyError. I was unable to find much documentation on the commands available, so I'm a bit stuck here.
推荐答案
The method created for executing javascript is called execute_script(), not execute():
driver.execute_script('return $("#list").DataTable().data();')
FYI, execute() is used internally for sending webdriver commands.
Note that if you want something returned by javascript code, you need to use return.
Also note that this can throw Can't find variable: $ error message. In this case, locate the element with selenium and pass it into the script:
# explicitly wait for the element to become present
wait = WebDriverWait(driver, 10)
element = wait.until(EC.presence_of_element_located((By.ID, "list")))
# pass the found element into the script
jsres = driver.execute_script('return arguments[0].DataTable().data();', element)
print(jsres)
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