meriyah

What is meriyah?

Meriyah is a fast and lightweight JavaScript parser that supports the latest ECMAScript standards. It is designed to be highly performant and can be used for various tasks such as syntax analysis, code transformation, and static code analysis.

What are meriyah's main functionalities?

Parsing JavaScript Code

This feature allows you to parse JavaScript code into an Abstract Syntax Tree (AST). The code sample demonstrates how to parse a simple JavaScript statement and log the resulting AST.

const meriyah = require('meriyah');
const ast = meriyah.parseScript('const x = 10;');
console.log(ast);

Parsing with Options

Meriyah supports various parsing options such as module parsing and JSX syntax. The code sample shows how to parse a script with these options enabled.

const meriyah = require('meriyah');
const ast = meriyah.parseScript('const x = 10;', { module: true, jsx: true });
console.log(ast);

Error Handling

Meriyah provides error handling capabilities to catch and handle syntax errors during parsing. The code sample demonstrates how to catch a parsing error and log the error message.

const meriyah = require('meriyah');
try {
  const ast = meriyah.parseScript('const x = ;');
} catch (e) {
  console.error('Parsing error:', e.message);
}

Other packages similar to meriyah

acorn

Acorn is a small, fast, JavaScript-based JavaScript parser. It is known for its modularity and flexibility, allowing users to extend its functionality with plugins. Compared to Meriyah, Acorn is more extensible but may be slightly slower in performance.

esprima

Esprima is a high-performance, standard-compliant ECMAScript parser. It is widely used in various JavaScript tools and frameworks. Esprima is known for its accuracy and reliability, but Meriyah is generally faster and more lightweight.

README

meriyah

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