FrontendHaltJavaScript·Intermediate·Conceptual·1 min read
Why does comparing two different Date objects with the same timestamp using === return false?
Short interview answer
Date objects are objects, so === compares references, not their internal time value; two distinct Date instances are never === to each other even representing the identical moment — use .getTime() to compare their values instead.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.