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Given the following Selenium Python code snippet, what will be the output if navigationStart is 1000 and loadEventEnd is 3500?

medium📝 query result Q13 of 15
Selenium Python - Advanced Patterns
Given the following Selenium Python code snippet, what will be the output if navigationStart is 1000 and loadEventEnd is 3500?
nav_start = driver.execute_script('return window.performance.timing.navigationStart;')
load_end = driver.execute_script('return window.performance.timing.loadEventEnd;')
load_time = load_end - nav_start
print(load_time)
A2500
B4500
C3500
D1000
Step-by-Step Solution
Solution:
  1. Step 1: Understand the variables

    nav_start = 1000, load_end = 3500 as given.
  2. Step 2: Calculate load_time

    load_time = load_end - nav_start = 3500 - 1000 = 2500.
  3. Final Answer:

    2500 -> Option A
  4. Quick Check:

    3500 - 1000 = 2500 [OK]
Quick Trick: Subtract navigationStart from loadEventEnd for load time [OK]
Common Mistakes:
  • Adding instead of subtracting timestamps
  • Using wrong variable names
  • Confusing loadEventEnd with other timing values

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