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espree

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espree

An Esprima-compatible JavaScript parser built on Acorn

  • 10.3.0
  • latest
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  • npm
  • Socket score

Version published
Weekly downloads
50M
decreased by-9.59%
Maintainers
2
Weekly downloads
 
Created

What is espree?

Espree is an actively-maintained JavaScript parsing library used to parse ECMAScript (JavaScript) code. It is built on top of Acorn, a high-performance, tiny JavaScript parser, and it adheres to the ECMAScript standard. Espree is often used in the context of development tools and frameworks to analyze and understand JavaScript code structure or to enable code transformation.

What are espree's main functionalities?

Parsing JavaScript code to an Abstract Syntax Tree (AST)

This feature allows developers to parse a string of JavaScript code into an AST, which can then be used for various static analysis tasks.

const espree = require('espree');
const ast = espree.parse('let x = 5;');

Parsing with specific ECMAScript version

Espree can parse code according to a specified ECMAScript version, allowing developers to work with features from different stages of JavaScript evolution.

const espree = require('espree');
const ast = espree.parse('let x = 5;', { ecmaVersion: 2020 });

Parsing with source type module

Espree can parse code written in module format, which includes the use of `import` and `export` statements.

const espree = require('espree');
const ast = espree.parse('export var x = 5;', { sourceType: 'module' });

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Package last updated on 29 Oct 2024

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