Selenium 等到 ID 元素出现或可见

Question

我如何让 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，可能不会出现在页面上我希望它等到元素出现，然后执行特定任务并继续代码的下一行。

Answer 1

你可以用这个。

Java:

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()

查看更多信息：https://www.selenium.dev/selenium/docs/api/java/org/openqa/selenium/support/ui/ExpectedConditions.html

Answer 2

要等到元素出现才能发送 字符序列，您需要引入 WebDriverWait for the and you can use either of the following :

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

Selenium 等到 ID 元素出现或可见

Selenium wait until element by ID is present or visible

python

xpath

css-selectors

selenium-webdriver

webdriverwait