meriyah/meriyah

Health v2 · maintenance only

Adoption not part of the score

1215 stars · 59 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Meriyah is a fully ECMAScript 2024-compliant, self-hosted JavaScript parser written in TypeScript that emits ESTree-compatible ASTs. It focuses on performance and stability, supports JSX and stage 3 proposals via options, and is already used in production.

Use cases

• parse javascript source code into an ast
• build a javascript linter or code analyzer
• parse jsx in a build tool
• analyze ecmascript syntax for a transpiler
• detect syntax errors in js files
• walk and transform javascript asts
• parse latest tc39 stage 3 syntax

When to choose

• you need a spec-compliant JavaScript parser with ESTree output
• you want JSX support and optional stage 3 proposal parsing
• performance and low memory usage matter for large codebases
• you need a stable, production-proven parser without TypeScript/Flow syntax

When to avoid

• you need to parse TypeScript or Flow syntax
• you need consistent RegExp validation across old runtimes
• you need a parser that backtracks or handles non-standard syntax

Facets

library · maturity stable

parser developer-tools parsers programming-languages web-development developer-tools browser cross-platform estree ecmascript ast jsx esnext tc39 javascript-parser no-backtracking nodejs javascript typescript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="meriyah/meriyah")