TypeScript, import, syntax, modules, project.

Working with TypeScript's import()

TypeScript’s import() provides an elegant way of importing modules, and can be used for dynamic loading of modules at runtime. This can be a great tool to reduce the size of your bundle by lazy-loading low priority elements such as analytics, additional 3rd party libraries, or even core components that are not immediately needed.

Getting Started

To use import() in TypeScript, you will need to use TypeScript 3.7 (or higher). Once you have TypeScript 3.7 installed, you will be able to use the import() syntax as follows:

import('./my-module')
    .then(myModule => {
        // do something with myModule
    });

The import() method takes a single argument - the path to the module you wish to import - and returns a promise. Once the promise is resolved, it will return the requested module.

Dynamic Imports

Using the import() syntax also allows you to dynamically import modules at runtime, meaning you can wait for user input before loading the requested module. This can help to reduce the initial load time of your application, as well as the size of your bundle.

async function importModule(moduleName) {
    const module = await import(`./modules/${moduleName}`);
    // do something with module
}

Another great benefit of dynamic imports is that you can easily substitute different implementations depending on certain criteria, such as browser type, feature flags, or environment variables.

Conclusion

TypeScript's import() is a great tool to help reduce the size of your bundles and ensure that only necessary code gets loaded when it's needed. With a little bit of planning, it can greatly improve the performance of your web applications.