C
CodeMirror
codemirror.net
Extensible code editor component for the browser, rewritten as modular CodeMirror 6 in 2022.
T
Tern by Marijn Haverbeke
Crowdfunded JavaScript code-analysis engine that provided editor autocompletion and type inference.
About Tern
Crowdfunded JavaScript code-analysis engine that provided editor autocompletion and type inference. Tern is a developer tools product built by indie maker Marijn Haverbeke, launched in 2013. Tern has since been shut down.
- Status
- Shut down
- Launched
- 2013
- Category
- Developer Tools
- Website
- ternjs.net
More products by Marijn Haverbeke
P
ProseMirror
prosemirror.net
Toolkit for building schema-based rich-text editors on the web, with collaborative editing support.
E
Eloquent JavaScript
eloquentjavascript.net
Free online JavaScript textbook, published in print by No Starch Press and now in its fourth edition.
Acorn
github.com
Small, fast JavaScript parser written in JavaScript and used across the build-tool ecosystem.
L
Lezer
lezer.codemirror.net
Incremental LR parser system that powers syntax highlighting and analysis in CodeMirror 6.
W
Wordgard
wordgard.net
Semantic rich-text editor library released in 2026, built on lessons from ProseMirror.
Tern FAQ
What is Tern?
Tern is a developer tools product: Crowdfunded JavaScript code-analysis engine that provided editor autocompletion and type inference.
Who made Tern?
Tern was made by Marijn Haverbeke, Creator of CodeMirror, ProseMirror and Acorn; author of Eloquent JavaScript. It launched in 2013. Marijn Haverbeke has also built CodeMirror, ProseMirror, Eloquent JavaScript, Acorn.
Is Tern still active?
No. Tern has been shut down by Marijn Haverbeke.
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