Importing TypeScript files dynamically into JavaScript requires additional compilation step, which is troublesome to write for many. Popular **typescript-require** package seems to be obsolete and doesn't allow much customization. Typed alternative to https://github.com/theblacksmith/typescript-require written in TypeScript.
npm i ts-import
import { tsImport } from 'ts-import';
const bootstrap = async () => {
const filePath = `/home/user/file.ts`;
const compiled = await tsImport.compile(filePath);
};
bootstrap();- Caches JavaScript files into directory inside node_modules/ts-import/cache (pretty much like typescript-require). Removing module removes cache as well.
- Fast - I've benchmarked ways to compare detecting file changes with fs module and checking mtimeMs turned out to be fastest (https://jsperf.com/fs-stat-mtime-vs-mtimems).
- Asynchronous - uses import over require therefore is asynchronous.
- Highly flexible and configurable - all tsc flags are available for customization. By default uses:
--module commonjs,--target es2015,--downlevelIteration,--emitDecoratorMetadata,--experimentalDecorators,--resolveJsonModulewhich allow great amount of features. - Compiler class - allows making multiple instances of compiler with different configurations and overriding default settings to all of them (i.e. logger) via static "defaults" property:
Compiler.defaults = { ...customDefaults }. tsImport object is a default instance of Compiler class suitable for majority of use-cases. - No interference - doesn't interfere with native import, require etc. changing their behavior or impacting their performance.