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Compare JavaScript == and === operators

Schneider ElectricSoftware Engineer · Technical Screen
MediumSoftware EngineerTechnical ScreenSoftware Engineering Fundamentals

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This question evaluates understanding of JavaScript equality semantics and type coercion, assessing a candidate's competency in language-specific comparison behavior and recognition of subtle runtime differences.

In JavaScript, what is the difference between the == and === operators?

Explain:

  1. How each operator compares two values.
  2. What type coercion is and how it relates to ==.
  3. Examples where == and === produce different results.
  4. Which operator you would recommend using in most cases and why.