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# @vue/runtime-core
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> This package is published only for typing and building custom renderers. It is NOT meant to be used in applications.
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For full exposed APIs, see `src/index.ts` . You can also run `yarn build runtime-core --types` from repo root, which will generate an API report at `temp/runtime-core.api.md` .
## Building a Custom Renderer
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``` ts
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import { createRenderer } from '@vue/runtime-core'
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const { render, createApp } = createRenderer({
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patchProp,
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insert,
remove,
createElement,
// ...
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})
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// `render` is the low-level API
// `createApp` returns an app instance with configurable context shared
// by the entire app tree.
export { render, createApp }
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export * from '@vue/runtime-core'
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```
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See `@vue/runtime-dom` for how a DOM-targeting renderer is implemented.
