Dynamic Import in JavaScript

A feature that allows JavaScript modules to be loaded dynamically at runtime, instead of during initial page load is called dynamic import.

Dynamic loading generally improves performance by reducing initial bundle size and loading code only when needed (e.g., on user interaction). We use the import() function to load a module dynamically.

Here is an example to demonstrate the working of dynamic import in real time applications

This is a html file where a button click triggers the import of a module, demonstrating on-demand loading.

The result for the module will be functioned inside math.js which is dynamically called here and returned with the solution. “import” is used to include the math.js file dynamically inside this script.js file.

Benefits of Dynamic Loading

The following are some of the key benefits of using dynamic loading in our applications using java script.

Improved Performance

Reduced memory usage

Better user experience

Modularity and maintainability

Bandwidth efficiency and enhanced security

Dynamic loading is also called as lazy loading or on demand loading and is used in various contexts like operating systems, web development, game development, and mobile apps.