@vue/runtime-core

What is @vue/runtime-core?

The @vue/runtime-core package is a part of the Vue.js framework that provides the core runtime components necessary for Vue applications to function. It includes the logic for the virtual DOM, components, reactivity system, and other essential features that enable developers to build interactive user interfaces.

What are @vue/runtime-core's main functionalities?

Reactivity System

The reactivity system allows developers to create reactive state objects that automatically update the DOM when the state changes.

{"import { reactive } from '@vue/runtime-core';\nconst state = reactive({ count: 0 });"}

Component Creation

This feature enables developers to define Vue components using the Composition API, which is a function-based approach to creating and managing component state and behavior.

{"import { defineComponent } from '@vue/runtime-core';\nconst MyComponent = defineComponent({\n  setup() {\n    // Component logic here\n  }\n});"}

Custom Renderer API

The Custom Renderer API allows developers to create custom renderers for Vue, enabling the use of Vue's reactivity and component system with different rendering backends, such as canvas or WebGL.

{"import { createRenderer } from '@vue/runtime-core';\nconst { render } = createRenderer({\n  patchProp,\n  ...otherOptions\n});"}

Other packages similar to @vue/runtime-core

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React is a popular JavaScript library for building user interfaces. It also has a virtual DOM, component-based architecture, and its own reactivity system. React focuses on a declarative programming model and differs from Vue in syntax and the ecosystem of tools and extensions.

preact

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inferno

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README

@vue/runtime-core

This package is published only for typing and building custom renderers. It is NOT meant to be used in applications.

For full exposed APIs, see src/index.ts.

Building a Custom Renderer

import { createRenderer } from '@vue/runtime-core'

const { render, createApp } = createRenderer({
  patchProp,
  insert,
  remove,
  createElement,
  // ...
})

// `render` is the low-level API
// `createApp` returns an app instance with configurable context shared
// by the entire app tree.
export { render, createApp }

export * from '@vue/runtime-core'

See @vue/runtime-dom for how a DOM-targeting renderer is implemented.

Changelog

3.5.17 (2025-06-18)

Bug Fixes

• compat: allow v-model built in modifiers on component (#12654) (cb14b86), closes #12652
• compile-sfc: handle mapped types work with omit and pick (#12648) (4eb46e4), closes #12647
• compiler-core: do not increase newlines in InEntity state (#13362) (f05a8d6)
• compiler-core: ignore whitespace when matching adjacent v-if (#12321) (10ebcef), closes #9173
• compiler-core: prevent comments from blocking static node hoisting (#13345) (55dad62), closes #13344
• compiler-sfc: improved type resolution for function type aliases (#13452) (f3479aa), closes #13444
• custom-element: ensure configureApp is applied to async component (#12607) (5ba1afb), closes #12448
• custom-element: prevent injecting child styles if shadowRoot is false (#12769) (73055d8), closes #12630
• reactivity: add __v_skip flag to Dep to prevent reactive conversion (#12804) (e8d8f5f), closes #12803
• runtime-core: unset old ref during patching when new ref is absent (#12900) (47ddf98), closes #12898
• slots: make cache indexes marker non-enumerable (#13469) (919c447), closes #13468
• ssr: handle initial selected state for select with v-model + v-for/v-if option (#13487) (1552095), closes #13486
• types: typo of vOnce and vSlot (#13343) (762fae4)