esprima

A JS high performance, standard-compliant ECMAScript parser

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Hunter's comment

Script Parsing is an analyzing process of a string or symbol. EsPrima is Javascript based and comes with sensible syntax formats. It also has an extension for React and API.

Esprima is a high performance, standard-compliant ECMAScript parser written in ECMAScript (also popularly known as JavaScript).
Source

Link

http://esprima.org/