Angus Croll • 8/8/2011

Fixing the JavaScript typeof operator

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This technical article details the well-known limitations and inconsistencies of JavaScript's typeof operator, such as 'typeof null' returning 'object'. It then introduces the concept of the internal [[Class]] property as a foundation for building a more accurate and discriminating type-checking function.

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#JavaScript #type checking #ecmascript
Fixing the JavaScript typeof operator

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