Add instruction how to load file-type in a CommonJS / TypeScript project

readme.md

@@ -16,10 +16,38 @@ We accept contributions for commonly used modern file formats, not historical or
 npm install file-type
 ```
 
-**This package is an ESM package. Your project needs to be ESM too. [Read more](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c).**
+> [!IMPORTANT]
+> This package is a **pure** ESM package, which means it can only be imported as an ESM module.
+> [Learn more about ESM](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c).
 
 If you use it with Webpack, you need the latest Webpack version and ensure you configure it correctly for ESM.
 
+### Importing in a CommonJS project
+
+We recommend updating your project to ESM for better compatibility and future-proofing.
+However, if you need to use file-type in a CommonJS project, you can do so as follows:
+
+```js
+(async () => {
+	// Dynamically import the file-type ESM module
+	const { fileTypeFromFile } = await import('file-type');
+})();
+```
+#### CommonJS in TypeScript Projects
+In CommonJS TypeScript projects, using `await import` may not work as expected because the TypeScript compiler transpiles `import()` to `require()`,
+which is incompatible with ESM.
+
+To work around this, you can use a utility like [load-esm](https://github.com/Borewit/load-esm),
+which facilitates dynamic ESM imports in TypeScript CommonJS environments:
+
+```js
+import { loadModule } from 'load-esm';
+(async () => {
+	// Dynamically import the file-type ESM module
+	const { fileTypeFromFile } = await loadModule('file-type');
+})();
+```
+
 ## Usage
 
 #### Node.js