@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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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

3.5.6 (2024-09-16)

Bug Fixes

• compile-dom: should be able to stringify mathML (#11891) (85c138c)
• compiler-sfc: preserve old behavior when using withDefaults with desutructure (8492c3c), closes #11930
• reactivity: avoid exponential perf cost and reduce call stack depth for deeply chained computeds (#11944) (c74bb8c), closes #11928
• reactivity: rely on dirty check only when computed has deps (#11931) (aa5dafd), closes #11929
• watch: once option should be ignored by watchEffect (#11884) (49fa673)
• watch: unwatch should be callable during SSR (#11925) (2d6adf7), closes #11924