What does weakly typed mean in JavaScript?
Variables can hold any type and change types at runtime. The engine coerces values automatically when types do not match, which can lead to unexpected results like 1 + '2' = '12'.
Verify This Answer
Cross-check this information using these trusted sources:
More FAQs in JavaScript Is Weakly Typed: What That Means
Because the + operator favors string concatenation. When one operand is a string, the other is coerced to a string, so 1 becomes '1' and the result is '12'.
== coerces operands to a common type before comparing, so '0' == 0 is true. === checks both type and value without coercion, so '0' === 0 is false. Always prefer ===.
Dynamically and weakly typed. Types are checked at runtime, not compile time, and the engine coerces values automatically when types mismatch.
Still have questions?
Browse all our FAQs or reach out to our support team