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npmjs.org "is boolean" keyword

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typechecker 9.3.0 💰
Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)
135 versions - Latest release: 5 months ago - 50 dependent packages - 15,842 dependent repositories - 827 thousand downloads last month - 47 stars on GitHub - 1 maintainer
validation-check-workaja 1.3.9
check whether value is undefined or empty or null
3 versions - Latest release: about 4 years ago - 15 downloads last month - 0 stars on GitHub - 1 maintainer
validation-checking 1.3.7 deprecated
check whether value is undefined or empty or null
21 versions - Latest release: about 4 years ago - 3 downloads last month - 1 stars on GitHub - 1 maintainer