Senior LevelNode JS
How do you write a custom ESM loader hook to transpile TypeScript files in memory in Node 20+?
❓ Interview Prompt: Explain `node:module` `register()`, `load` hook, `resolve` hook, and compiling TypeScript in memory using `esbuild` or `swc`.
Node 20+ customizable ESM module loaders allow compiling TypeScript files in memory during import resolution:
Code Implementation Example
javascript
import { register } from 'node:module';
// Register custom loader hook in entry script
register('ts-node/esm', import.meta.url);💡Registering custom TypeScript loader hooks in Node 20+.
🎯 Interview Key Takeaway
Use module.register() to create custom ESM module loader hooks for TypeScript and JSX.
#ESM Loaders#TypeScript#register#Senior
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