Esprima

Esprima: High-Performance JavaScript Parsing Library

Esprima is a high-performance, open-source JavaScript parsing library that converts JavaScript code into an abstract syntax tree (AST). It aims to be spec-compliant and support ECMAScript syntax up to ES8, ES2017.

What is Esprima?

Esprima is an open-source JavaScript parsing library that analyzes JavaScript code and converts it into an abstract syntax tree (AST) representation. It was created by Ariya Hidayat and other contributors, originally released in 2012.

Some key features and capabilities of Esprima include:

• High-performance parsing of JavaScript code according to the ECMAScript specification standards
• Fully compliant support for ECMAScript syntax up to ES8 and ES2017 versions
• Both syntax and semantic token analysis of JavaScript code
• Output of a hierarchical abstract syntax tree (AST) structure
• Options for syntactic validation and erroneous code detection
• Extensive line and column tracking on AST nodes
• Optional source map generation for compiled/compressed code
• Available via JavaScript and Java APIs for integration into projects

Esprima serves purposes like code analysis, instrumentation, debugging, testing, and more. It can power IDE syntax highlighting, autocompletion, linters, and compilers by providing a full structured parse of JavaScript. The AST output is easy to traverse and inspect programmatically in applications. Overall, Esprima brings standard, spec-compliant JavaScript parsing capabilities for common and emerging use cases.

Esprima Features

Official Links