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SPECIFICTION
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Flems

flems.io

WebSelf-hosted
Visit flems.io
Spec score 6.9 #135 of 138 in Coding Playgrounds

Spec sheet

Purpose
Flems is a browser playground for prototyping and sharing front-end examples.Read 12 Oct 2026 · github.com
Product
Flems describes itself as a browser coding playground.Read 12 Oct 2026 · flems.io
Support
The module README directs users who need bundling help to create an issue.Read 12 Oct 2026 · github.com
License
The Flems repository identifies its license as WTFPL.Read 12 Oct 2026 · github.com
Browser execution
After the page loads, code is computed in the browser and saved as a compressed string in the URL.Read 12 Oct 2026 · github.com
Compilers
The site README says Flems supports TypeScript, LiveScript, and Babel standalone compilation.Read 12 Oct 2026 · github.com
Default files
A new Flems starts with HTML, JavaScript, and CSS files, and users can add more files.Read 12 Oct 2026 · github.com
Dependencies
Users can add CSS and JavaScript dependencies by URL or NPM package reference, which are fetched from unpkg.com.Read 12 Oct 2026 · github.com
Deployment options
staticRead 24 Sep 2026 · flems.io
Editor and runtime
The module README lists an editor, runtime console, automatic reload, and controls for toolbar and file tabs.Read 12 Oct 2026 · github.com
Editor options
The Flems module exposes options to show or hide the toolbar, file tabs, link tabs, share and reload buttons, and console.Read 12 Oct 2026 · github.com
Embed and self-host
Flems.io is based on an open-source Flems module that can be used for self-hosting or embedding.Read 12 Oct 2026 · github.com
Files and languages
A new Flems starts with HTML, JavaScript, and CSS files, and it supports TypeScript, LiveScript, and Babel standalone compilation.Read 12 Oct 2026 · github.com
Full-stack runtime
NoRead 24 Sep 2026 · flems.io
Fullscreen limit
The Flems.io README says fullscreen functionality is currently disabled.Read 12 Oct 2026 · github.com
Integration limit
For linked files, the module README says CORS-enabled files shorter than 200,000 characters open in the editor; other linked files are simply linked.Read 12 Oct 2026 · github.com
Limit
The project README describes Flems as a static web app and browser code playground.Read 12 Oct 2026 · github.com
Runtime
The module uses an iframe as a runtime for the code being edited.Read 12 Oct 2026 · github.com
Self-hosting and embedding
Flems.io is based on an open-source Flems module that can be self-hosted or embedded.Read 12 Oct 2026 · github.com
Shareable links
Flems stores application state in the URL hash, so the URL can link to the current playground state.Read 12 Oct 2026 · github.com
Sharing
Flems stores playground state as a compressed string in the URL, which serves as a shareable link to the current example.Read 12 Oct 2026 · github.com
Sharing controls
link_accessRead 24 Sep 2026 · flems.io
Use case
Flems.io is described as a web playground for prototyping ideas and sharing working front-end code examples.Read 12 Oct 2026 · github.com

Where Specifiction places it

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