IE中.Click事件因onchange异常，网站隐藏标签搜索自动化求助

Hey there, let's tackle these two automation issues one by one—here are actionable solutions tailored to your problems:

IE’s event handling is notoriously quirky, especially when onchange and click events interfere with each other. Here are a few reliable workarounds:

• Explicitly trigger onchange before clicking: If the onchange event is tied to an input value change, fire it manually before triggering the click. For example, using Selenium:

  input_element = driver.find_element(By.ID, "your-input-id")
  input_element.send_keys("new-value")
  # Manually trigger the onchange event
  driver.execute_script("arguments[0].onchange();", input_element)
  # Now execute the click
  click_element = driver.find_element(By.ID, "your-click-target-id")
  click_element.click()
  

• Simulate native JavaScript events: IE sometimes ignores synthetic events from automation tools. Try dispatching proper change and click events directly via JS:

  // Trigger change event on the input
  const input = document.getElementById('your-input-id');
  const changeEvent = document.createEvent('Event');
  changeEvent.initEvent('change', true, true);
  input.dispatchEvent(changeEvent);
  
  // Trigger click on the target element
  const btn = document.getElementById('your-click-target-id');
  const clickEvent = document.createEvent('Event');
  clickEvent.initEvent('click', true, true);
  btn.dispatchEvent(clickEvent);
  

• Check for event blocking: Inspect the onchange handler code—if it calls event.preventDefault() or event.stopPropagation(), that could be blocking the click. If you have access to modify the code, remove those lines; if not, bypass the handler via JS execution.

Let’s break down the steps to interact with this site reliably:

Step 1: Activate the Hidden "Legislação" Tab #

The tab is activated via the inline onclick function on the link with id="lk_leg". Automation tools might not trigger this correctly with a simple click, so execute the JS directly:

# Using Selenium as an example
# First, execute the tab activation script
driver.execute_script("move_layer('legislacao', parent.hiddenFrame.layerX);")
# Wait for the tab content to load (critical to avoid race conditions)
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.NAME, "leg_campo1")))

Alternatively, if the script relies on the link’s context, click the element first before executing the JS:

leg_tab = driver.find_element(By.ID, "lk_leg")
leg_tab.click()
# Then add the wait as above

Step 2: Fill the "Todos os campos" Field #

Once the tab is active, locate the field by its name attribute and populate it:

search_field = driver.find_element(By.NAME, "leg_campo1")
search_field.clear()  # Clear any pre-filled value
search_field.send_keys("your-search-query")

# Trigger the search (locate the submit button, adjust the selector as needed)
search_btn = driver.find_element(By.XPATH, "//input[@type='submit' or @value='Pesquisar']")
search_btn.click()

Additional Tips for This Site #

• Frame Handling: The site uses a hiddenFrame—if elements aren’t found, check if they’re inside an iframe and switch to it:

  driver.switch_to.frame("hiddenFrame")
  # Perform your actions here
  driver.switch_to.default_content()  # Switch back when done
  

• Avoid Hard Sleeps: Use explicit waits (like WebDriverWait) instead of time.sleep()—this makes your automation more stable for older, slow-loading sites.

内容的提问来源于stack exchange，提问作者danieltakeshi