React Lazy vs Dynamic Import

Developers should use React Lazy when building large React applications where initial bundle size impacts performance, such as in SPAs with many routes or complex features meets developers should use dynamic import to optimize web applications by reducing initial bundle sizes and improving load times, especially for large single-page applications (spas) or features that are not immediately required. Here's our take.

React Lazy

Nice Pick

Developers should use React Lazy when building large React applications where initial bundle size impacts performance, such as in SPAs with many routes or complex features

Pros

• It is ideal for lazy-loading components that are not immediately required, like modals, tabs, or route-based components, to enhance user experience by speeding up the first contentful paint
• Related to: react-suspense, code-splitting

Cons

• Specific tradeoffs depend on your use case

Dynamic Import

Developers should use Dynamic Import to optimize web applications by reducing initial bundle sizes and improving load times, especially for large single-page applications (SPAs) or features that are not immediately required

Pros

• It's essential for implementing lazy loading of routes, components, or libraries in frameworks like React, Vue, or Angular, and for conditionally loading polyfills or modules based on user interactions or device capabilities
• Related to: javascript, es-modules

Cons

• Specific tradeoffs depend on your use case

The Verdict

These tools serve different purposes. React Lazy is a library while Dynamic Import is a concept. We picked React Lazy based on overall popularity, but your choice depends on what you're building.

The Bottom Line

React Lazy wins

Based on overall popularity. React Lazy is more widely used, but Dynamic Import excels in its own space.