Does strict mode make JavaScript strongly typed?
No. Strict mode catches some bugs like accidental globals and silent this defaults, but it does not add types. JavaScript remains loosely typed even in strict mode. Use TypeScript for static typing.
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More FAQs in JavaScript as a Loosely Typed Language Explained
Variables can hold any type and change types at runtime. You never declare a variable's type. The engine coerces values automatically when types do not match in operations.
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'.
Use === and !== instead of == and !=. Convert types explicitly with Number() and String(). Validate inputs at function boundaries. Use TypeScript for large codebases and strict mode to catch silent bugs.
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