Vue 3, released in September 2020, brought several improvements and new features over Vue 2. Here are some of the key changes:
- Composition API: This is perhaps the most significant addition to Vue 3. It provides a way to organize code logic in a more flexible and scalable manner compared to Vue 2’s Options API. The Composition API allows you to encapsulate logic into reusable functions called “composition functions,” making it easier to share and compose code across components.
- Teleport: Vue 3 introduces a new
teleportfeature, which allows you to render a component’s children to a different part of the DOM, outside of the current component hierarchy. This can be useful for creating modal dialogs, tooltips, and other components that need to be rendered outside the main component. - Faster and Smaller: Vue 3 is faster and smaller than Vue 2, thanks to its rewritten virtual DOM implementation (using a technique called “Proxy-based change detection”) and optimized build size.
- Improved TypeScript Support: Vue 3 is written in TypeScript, which has led to improved TypeScript support and better type inference in Vue components.
- Better Reactivity System: Vue 3’s reactivity system has been revamped to be more consistent and efficient, especially for reactive primitives like plain objects and arrays.
- Custom Renderer API: Vue 3 introduces a new custom renderer API, making it easier to target different platforms (e.g., native mobile, WebGL) or integrate Vue with other frameworks and libraries.
These are just a few highlights of the many improvements and new features in Vue 3. Overall, Vue 3 offers a more powerful, performant, and flexible development experience compared to its predecessor.
