Tons of Solutions Engineering work done today for the rest of the CS team! Headway, Howard Hanna, Engels, Brighton, etc. Also completed Datasnippers auth flow and worked on Anthology's script. Cloned Anthology's courses (900..) and will clone Full Story on Monday.
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[](https://www.npmjs.com/package/esprima)
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[](https://www.npmjs.com/package/esprima)
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[](https://travis-ci.org/jquery/esprima)
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[](https://codecov.io/github/jquery/esprima)
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**Esprima** ([esprima.org](http://esprima.org), BSD license) is a high performance,
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standard-compliant [ECMAScript](http://www.ecma-international.org/publications/standards/Ecma-262.htm)
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parser written in ECMAScript (also popularly known as
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[JavaScript](https://en.wikipedia.org/wiki/JavaScript)).
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Esprima is created and maintained by [Ariya Hidayat](https://twitter.com/ariyahidayat),
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with the help of [many contributors](https://github.com/jquery/esprima/contributors).
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### Features
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- Full support for ECMAScript 2017 ([ECMA-262 8th Edition](http://www.ecma-international.org/publications/standards/Ecma-262.htm))
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- Sensible [syntax tree format](https://github.com/estree/estree/blob/master/es5.md) as standardized by [ESTree project](https://github.com/estree/estree)
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- Experimental support for [JSX](https://facebook.github.io/jsx/), a syntax extension for [React](https://facebook.github.io/react/)
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- Optional tracking of syntax node location (index-based and line-column)
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- [Heavily tested](http://esprima.org/test/ci.html) (~1500 [unit tests](https://github.com/jquery/esprima/tree/master/test/fixtures) with [full code coverage](https://codecov.io/github/jquery/esprima))
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### API
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Esprima can be used to perform [lexical analysis](https://en.wikipedia.org/wiki/Lexical_analysis) (tokenization) or [syntactic analysis](https://en.wikipedia.org/wiki/Parsing) (parsing) of a JavaScript program.
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A simple example on Node.js REPL:
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```javascript
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> var esprima = require('esprima');
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> var program = 'const answer = 42';
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> esprima.tokenize(program);
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[ { type: 'Keyword', value: 'const' },
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{ type: 'Identifier', value: 'answer' },
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{ type: 'Punctuator', value: '=' },
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{ type: 'Numeric', value: '42' } ]
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> esprima.parseScript(program);
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{ type: 'Program',
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body:
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[ { type: 'VariableDeclaration',
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declarations: [Object],
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kind: 'const' } ],
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sourceType: 'script' }
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```
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For more information, please read the [complete documentation](http://esprima.org/doc).
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