purescript-sdom
A PureScript library that replaces the virtual DOM with a static DOM approach to avoid expensive diffing operations.
What is purescript-sdom?
purescript-sdom is a PureScript library that provides an alternative to the virtual DOM by using a Static DOM (SDOM) approach. It allows developers to build web UIs where the component tree structure is static, and only text nodes and attributes change dynamically, eliminating the need for expensive diffing operations. The library aims to offer the clean functional semantics of VDOM-based libraries without the performance overhead.
PureScript developers building web applications who are interested in performance optimization and alternative UI paradigms, particularly those looking to avoid virtual DOM diffing costs in applications with stable UI structures.
Developers choose purescript-sdom because it provides the declarative benefits of virtual DOM approaches while being more efficient for applications where the UI shape is largely static. Its unique selling point is eliminating diffing overhead while still supporting common dynamic UI patterns through its limited dynamic behavior capabilities.
Overview
An experiment in replacing the virtual DOM and avoiding diffing
Use Cases
Best For
- Building forms with validation where UI elements don't change structure
- Creating dashboard applications with stable layout components
- Developing performance-sensitive UIs where virtual DOM diffing is a bottleneck
- Implementing template-like interfaces with one-way data binding
- Exploring alternative UI architectures in functional programming contexts
- Building applications where most dynamic updates are to text content or attributes
Not Ideal For
- Applications requiring highly dynamic component trees with frequent structural changes (e.g., drag-and-drop interfaces or nested list rearrangements)
- Production teams needing stable, well-supported libraries with extensive ecosystems and documentation
- Developers unfamiliar with PureScript or preferring mainstream JavaScript frameworks like React or Vue
- Projects where server-side rendering or isomorphic rendering is a critical requirement
Pros & Cons
Pros
Preserves the declarative state-to-UI mapping that makes VDOM approaches appealing, as highlighted in the motivation section for a 'clean denotation'.
Eliminates VDOM diffing overhead by using a static tree where only text and attributes change, reducing runtime costs for static UIs, as stated in the key features.
Supports common UI patterns like uniform arrays of subcomponents without full dynamic trees, enabling templates-like development with one-way binding, per the README.
Challenges the VDOM paradigm by exploring an alternative static approach, offering insights for performance optimization and functional UI design, as it's framed as an experiment.
Cons
Cannot handle dynamic component tree reshaping, restricting use to applications with fixed UI structures, as the README admits only 'limited dynamic behavior' is supported.
Lacks production-ready stability, with potential for breaking changes and minimal community support, since it's explicitly described as an 'experiment' in the README.
Requires proficiency in PureScript, a niche functional language, which increases the learning curve and limits accessibility compared to JavaScript-based alternatives.
Frequently Asked Questions
Related Projects
purescript-halogenA declarative, type-safe UI library for PureScript.
purescript-puxBuild type-safe web apps with PureScript.
purescript-reactReact Bindings for PureScript
purescript-thermiteA simple PureScript wrapper for React
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