tc39/proposal-pattern-matching resource

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

5789 stars · 90 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A TC39 Stage 1 proposal adding structural pattern matching syntax (a match expression) to ECMAScript/JavaScript. The repository hosts the proposal document and generated specification text rather than runnable software.

Use cases

• add pattern matching to javascript
• replace verbose switch statements in js
• match on object structure in javascript
• follow the tc39 pattern matching proposal status
• understand proposed match expression syntax
• compare switch vs pattern matching in ecmascript

When to choose

• you want to track or give feedback on the future of JavaScript pattern matching syntax
• you are researching language design or writing a transpiler/polyfill for proposed syntax
• you need the official spec text for the match expression proposal

When to avoid

• you need pattern matching you can run in production JavaScript today
• you want a library or runtime tool rather than a language proposal
• you need a finalized, standardized feature with browser support

Facets

learning-resource · maturity experimental

programming-language developer-tools programming-languages web-development cross-platform ecmascript tc39 language-proposal pattern-matching specification stage-1-proposal javascript specifications

Member repositories

For agents

markdown · JSON · MCP: product_card(name="tc39/proposal-pattern-matching")