Transpile TypeScript In Memory With Node

Question

Is there a way to transpile TypeScript in memory with Node? I would like to be able to get the generated JavaScript in memory.

Answer 1

Yes. TypeScript provides a a ts.transpileModule function:

const ts = require('typescript');
const source = "let x: string  = 'hello world'";
const result = ts.transpileModule(source, { compilerOptions: { module: ts.ModuleKind.CommonJS }});
console.log(result.outputText); // var x = 'hello world';

More

• From the TypeScript wiki : https://github.com/microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function