[Solved] What is wrong with this code snippet? load_time = driver.execute_script('return window.performance.timing.loadEventEnd - window.performance.timing.... What is wrong with this code snippet? | Selenium Python

Selenium Python - Advanced Patterns

What is wrong with this code snippet? load_time = driver.execute_script('return window.performance.timing.loadEventEnd - window.performance.timing.navigationStart') print(load_time) It returns 0 even after page load.

AnavigationStart is incorrect property

BloadEventEnd is 0 because page is not fully loaded

Cexecute_script cannot do arithmetic

Dprint() is called before execute_script

Step-by-Step Solution

Solution:

Step 1: Understand timing properties behavior
loadEventEnd is 0 if page load not complete yet.
Step 2: Reason why result is zero
Subtracting navigationStart from 0 gives 0, explaining output.
Final Answer:
loadEventEnd is 0 because page is not fully loaded -> Option B
Quick Check:
loadEventEnd = 0 means page still loading [OK]

Quick Trick: Check if loadEventEnd is zero before using it [OK]

Common Mistakes:

Assuming arithmetic fails
Wrong property names
Misordering print and execute_script

Master "Advanced Patterns" in Selenium Python

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Trace Try Challenge Automate Recall Frame

More Selenium Python Quizzes

What is wrong with this code snippet?

Step 1: Understand timing properties behavior

Step 2: Reason why result is zero

Final Answer:

Quick Check:

Want More Practice?