bterlson/ecmarkup

An HTML superset/Markdown subset source format for ECMAScript and related specifications

245

stars

847

commits

TypeScript

primary language

Sep 8, 2026

updated

tc39.es/ecmarkup/Browse cluster: ECMAScript Language Specification & Proposals →

README

ecmarkup

A web component-based source format for ECMAScript and related specifications. See the project page for details.

Installing & Using

Requires node 8 or above.

npm install ecmarkup
ecmarkup in.html out.html

Formatter

There is also an auto-formatter:

emu-format --write spec.html

See its --help for more details.

Contributors

(top 30 of 34)

344 commits

278 commits

54 commits

54 commits

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Languages

TypeScript

76.0%

HTML

12.7%

JavaScript

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CSS

4.8%

bterlson/ecmarkup

An HTML superset/Markdown subset source format for ECMAScript and related specifications

245

stars

847

commits

TypeScript

primary language

Sep 8, 2026

updated

tc39.es/ecmarkup/Browse cluster: ECMAScript Language Specification & Proposals →

README

ecmarkup

A web component-based source format for ECMAScript and related specifications. See the project page for details.

Installing & Using

Requires node 8 or above.

npm install ecmarkup
ecmarkup in.html out.html

Formatter

There is also an auto-formatter:

emu-format --write spec.html

See its --help for more details.

Similar repos

tc39/ecmarkup

An HTML superset/Markdown subset source format for ECMAScript and related specifications

244

shared contributors

tc39/ecma262

Status, process, and documents for ECMA-262

15,687

shared contributors

bterlson/eshost-cli

Run ECMAScript code uniformly across any ECMAScript host

205

shared contributors

tc39/proposals

Tracking ECMAScript Proposals

19,187

shared contributors

rehypejs/rehype-format

plugin to format HTML

tc39/process-document

Document describing the process for making changes to ECMA-262

shared contributors

benjamingr/RegExp.escape

Proposal for investigating RegExp escaping for the ECMAScript standard

395

shared contributors

tc39/proposal-regex-escaping

Proposal for investigating RegExp escaping for the ECMAScript standard

395

shared contributors

Contributors

(top 30 of 34)

344 commits

278 commits

54 commits

54 commits

Languages

TypeScript

76.0%

HTML

12.7%

JavaScript

6.5%

CSS

4.8%