cem

A hexagon with a spiderweb pattern spiraling into the bottom right corner

The blazing-fast CLI tool for generating and working with Custom Elements Manifests .

Use cem to generate , validate , and query custom elements manifests. Develop with the dev server featuring live reload, interactive knobs, and buildless TypeScript. Then, use the built-in LSP and MCP servers to activate powerful, AI-native editor features like hover documentation, autocomplete, and more.

npm install --save-dev @pwrs/cem
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