What is Partial.js?
Partial.js is an open-source JavaScript library that enables web developers to implement partial/progressive rendering in their web applications. It allows parts of a web page to be incrementally fetched and rendered to improve perceived page load times.
Here are some key features of Partial.js:
- Lets you define reusable page fragments that can be independently fetched and rendered.
- Fragments can have dependencies on other fragments to control load order.
- Supports asynchronous and synchronous loading of fragments.
- Fragments are cached so they only load once.
- Lightweight library, only 2kB when gzipped.
- Integrates well with popular frameworks like React and Vue.
By leveraging Partial.js, developers can significantly improve the user experience in their web apps by showing content faster. Use cases include:
- Rendering above-the-fold content first
- Lazy-loading secondary content after initial render
- Building pages with multiple asynchronous sections
- Implementing skeleton screens and placeholders
- Code splitting and dynamic imports
Partial.js is production-ready and suitable for implementation in large-scale web applications. Combined with good coding practices, it can lead to faster interactive times and happier users.