Can I use onResolve to handle dynamic imports

How to Handle Dynamic Imports with onResolve

1. Intercept Dynamic Imports: When a dynamic import is encountered, you can use `onResolve` to modify how that import is resolved. This is particularly useful if you want to redirect the import or apply specific logic based on the dynamic expression.

2. Callback Arguments: The callback function for `onResolve` receives an object that includes properties such as `path`, `importer`, and `expression`. The `expression` property contains the raw source code of the dynamic import, which allows you to analyze or transform it.

3. Return Value: You can return a new path or module from the `onResolve` callback, effectively controlling what module is loaded when a dynamic import is executed.

Example Usage

Here's a simple example of how you might set up an `onResolve` hook to handle dynamic imports:

javascript
import { plugin } from "bun";

const dynamicImportPlugin = plugin({
  name: "dynamic-import-handler",
  setup(build) {
    build.onResolve({ filter: /.*/ }, (args) => {
      if (args.importer && args.expression) {
        // Check if it's a dynamic import
        console.log(`Dynamic import detected: ${args.expression} from ${args.importer}`);

        // You can modify the path here if needed
        return {
          path: args.expression, // Modify this as necessary
          namespace: "dynamic-imports",
        };
      }
    });
  },
});

// Register the plugin
Bun.build({
  entrypoints: ["./app.ts"],
  plugins: [dynamicImportPlugin],
});

Summary

Using `onResolve`, you can effectively manage and manipulate dynamic imports within your Bun application. This capability allows you to implement custom logic for resolving modules dynamically, enhancing the flexibility of your module loading strategy.