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JavaScript Tutorial – typeof operator
typeof ‘str’ = “string” typeof true = “boolean” typeof false = “boolean” typeof null = “object” typeof undefined = “undefined” typeof 5 = “number” typeof NaN = “number” typeof function = “function” typeof object = “object” Like my Facebook page: https://www.facebook.com/pages/WebTunings/339234242822202 Recommended JavaScript Book: Code snippets: https://github.com/webtunings Original source