Selenium将等待，直到ID元素出现或可见

Question

如何让Selenium等到某个ID元素出现在页面上

driver.find_element(By.ID, "FirstName").send_keys("MyFirstName")
driver.find_element(By.ID, "LastName").send_keys("MyLastName")
driver.find_element(By.ID, "PhoneNumber").send_keys("myPhoneNumber")
driver.find_element(By.ID, "Email").send_keys("myEmail")

例如，第3行可能不在页面上，我希望它等待元素出现，然后执行特定任务并继续执行代码的下一行

Answer 1

你可以用这个

爪哇：

WebDriverWait w1 = new WebDriverWait(driver, 5);
w1.until(ExpectedConditions.visibilityOfElementLocated(By.id("submit_btn")));

Python:

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

driver = webdriver.Firefox()
driver.get("http://somedomain/url_that_delays_loading")
try:
    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((By.ID, "myDynamicElement"))
    )
finally:
    driver.quit()

有关的详细信息：https://www.selenium.dev/selenium/docs/api/java/org/openqa/selenium/support/ui/ExpectedConditions.html

Answer 2

要等待元素出现后发送字符序列，需要为^{}归纳WebDriverWait，并且可以使用以下Locator Strategies之一：

• 使用ID：

  WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.ID, "PhoneNumber"))).send_keys("user901")
  

• 使用CSS_SELECTOR：

  WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "#myPhoneNumber"))).send_keys("user901")
  

• 使用XPATH：

  WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//*[@id='myPhoneNumber']"))).send_keys("user901")
  

• 注意：您必须添加以下导入：

  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.common.by import By
  from selenium.webdriver.support import expected_conditions as EC