Extract and Optimize Personal Income Tax Calculation Function

[DongThin]

Objective:

To improve code modularity, optimize performance and prepare for later learning content , we need to extract the personal income tax calculation function from the existing JavaScript file into a separate module.

Tasks:

• Extract Tax Calculation Function:

  • Create a new JavaScript file named taxCalculator.js.
  • Extract the function responsible for calculating personal income tax from net.js and move it to taxCalculator.js.
  • Review the tax calculation function in taxCalculator.js for any potential optimization opportunities (e.g., loop iterators like forEach, map, reduce).

• Unit Tests Extraction:

  • Extract unit tests related to the tax calculation function from the existing test suite to taxCalculator.test.js.
  • Adjust unit tests as necessary to accommodate the separation of concerns.

Additional Notes:

• Ensure that the code maintains readability and adheres to best practices.