Mathias Bynens • 2/21/2012

Valid JavaScript variable names in ES5

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This technical article details the ECMAScript 5 specification for valid JavaScript variable names (identifiers). It covers reserved keywords, future reserved words, and the specific Unicode character categories allowed at the start and within identifiers. It also discusses non-reserved words like NaN that should be avoided and clarifies changes from ES3.

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#JavaScript #es5 #unicode
Valid JavaScript variable names in ES5

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