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ts-import

v5.0.0-beta.0

Published

Import (compile and cache on the fly) TypeScript files dynamically with ease.

Downloads

178,640

Readme

"Buy Me A Coffee"

Table of contents

Features

  • Asynchronous and synchronous version - uses import for async and require for sync.
  • Caches JavaScript files into directory inside .cache/ts-import.
  • 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). Also, compilation in versions 3+ is approximately 10x faster than in version 2.
  • Few dependencies - uses only comment-parser and my tiny utility package options-defaults.
  • Highly flexible and configurable - all compilerOptions are available under transpileOptions parameter.
  • No interference - doesn't interfere with native import, require etc. changing their behavior or impacting their performance.

Install

npm i ts-import@4 - CJS npm i ts-import@5 - ESM

Usage

import * as tsImport from 'ts-import';

const main = async () => {
    const filePath = `/home/user/file.ts`;
    const asyncResult = await tsImport.load(filePath, {
        // allowConfigurationWithComments: false,
    });

    // Only available in version 4.
    const syncResult = tsImport.loadSync(filePath);
};

void main();

allowConfigurationWithComments

You can define if file should be imported in the default transpile mode or compile mode by placing a comment on top of the specific file.

Compile mode is slower, but allows the specified file to be part of a complex program - it can import other files etc.

/**
 * @tsImport
 * { "mode": "compile" }
 */

import { getOtherVariable } from './get-other-variable';

const result = getOtherVariable();

export { result };