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Solid.js is a declarative JavaScript library for building user interfaces, emphasizing fine-grained reactivity and efficient updates without virtual DOM.

What is Solid.js?

Solid.js is a declarative JavaScript library for building user interfaces, emphasizing fine-grained reactivity and efficient updates without relying on a virtual DOM. Developed by Ryan Carniato, Solid.js stands out in the crowded field of web frameworks due to its exceptional performance and straightforward reactivity model.

Solid.js employs a reactive programming paradigm, where the state and the UI are tightly coupled. Changes in the state automatically propagate to the affected parts of the UI. This enables Solid.js to bypass the virtual DOM diffing process commonly used by frameworks like React.js or Vue.js. Instead, Solid.js updates the real DOM directly, resulting in highly efficient rendering.

Key Features of Solid.js

1. Fine-Grained Reactivity

One of the core strengths of Solid.js is its fine-grained reactivity. Every piece of reactive state in Solid.js is tracked individually, and only the parts of the DOM that depend on that state are updated. This minimizes unnecessary re-renders and maximizes performance, making Solid.js one of the fastest frameworks available.

2. Simple and Declarative

Solid.js provides a simple and declarative syntax that is easy to learn and use. The API is designed to be straightforward, allowing developers to focus on building their applications without getting bogged down by complex abstractions.

3. No Virtual DOM

Unlike many other frameworks, Solid.js does not use a virtual DOM. Instead, it updates the real DOM directly. This eliminates the overhead of diffing and patching the virtual DOM, leading to faster updates and improved performance.

4. Tiny Bundle Size

Solid.js is lightweight, with a bundle size significantly smaller than many other popular frameworks. This makes it an excellent choice for building fast, efficient applications, especially for performance-critical use cases.

How Does Solid.js Compare to Other Frameworks?

Solid.js vs. React.js

While both Solid.js and React.js are declarative libraries for building user interfaces, they have different approaches to rendering and reactivity. React.js relies on a virtual DOM and a diffing algorithm to update the UI, whereas Solid.js updates the real DOM directly with fine-grained reactivity. This results in Solid.js having better performance in many cases.

Solid.js vs. Vue.js

Similar to React.js, Vue.js also uses a virtual DOM to manage updates. Solid.js' fine-grained reactivity model allows it to avoid the overhead associated with virtual DOM diffing, making it more efficient. Additionally, Solid.js' tiny bundle size makes it an attractive option for projects where performance and bundle size are critical considerations.

Common Use Cases for Solid.js

Solid.js is suitable for a wide range of applications, from small, single-page applications to large, complex web apps. Its lightweight nature and exceptional performance make it especially well-suited for performance-critical applications where every millisecond counts. Additionally, its straightforward, declarative syntax makes it a great choice for developers looking to build maintainable and scalable applications with ease.

Single Page Applications (SPAs)

Solid.js excels in building single-page applications (SPAs). Its fine-grained reactivity ensures that only the necessary parts of the DOM are updated when the state changes, resulting in fast, smooth user experiences.

Progressive Web Applications (PWAs)

Given its small bundle size and efficient rendering, Solid.js is an excellent choice for building progressive web applications (PWAs). These applications can benefit from the performance improvements offered by Solid.js, leading to better user engagement and conversion rates.

Performance-Critical Applications

For applications where performance is paramount, such as data-intensive dashboards or real-time collaborative tools, Solid.js offers significant advantages. Its fine-grained reactivity and direct DOM updates ensure that the application remains responsive and performant, even under heavy loads.

Leveraging Solid.js with wisp

wisp's robust CMS capabilities can be seamlessly integrated with Solid.js to power content-rich applications. By combining the efficient rendering capabilities of Solid.js with the scalable, flexible content management offered by wisp, developers can build high-performance websites and applications that are both easy to manage and lightning-fast.

One of the key advantages of using wisp with Solid.js is the ability to manage content dynamically. With wisp's API-driven approach, content can be fetched and updated in real-time without sacrificing performance. Additionally, wisp's composable architecture allows developers to structure their content in a way that best fits their application's needs.

Getting Started with Solid.js

To get started with Solid.js, you can follow the official documentation and guides available on the Solid.js website. These resources provide comprehensive information on installation, core concepts, and best practices to help you build high-performance applications effectively.

For more in-depth tutorials and community support, you can also join the Solid.js Discord server and participate in discussions with fellow developers.


Solid.js is a powerful, efficient library for building user interfaces with fine-grained reactivity and direct DOM updates. Its performance advantages, simple syntax, and lightweight nature make it a compelling choice for a wide range of applications, from small SPAs to complex, performance-critical web applications.

By integrating Solid.js with wisp, developers can take advantage of wisp's CMS capabilities to build content-rich, high-performance websites and applications. Whether you're building a new project from scratch or looking to improve an existing application, Solid.js and wisp provide a solid foundation for success.