TypeScript + Node.js FileSystem issue -


i have simple typescipt program 

/// <reference path="node-definitions/node.d.ts" /> import fs = require('fs'); fs.writefilesync("test.txt","helloworld");

when run it, says fs empty https://www.dropbox.com/s/ygvfi8us4mdignd/screenshot%202015-06-11%2010.11.12.png?dl=0

the generated js code correct https://www.dropbox.com/s/egl06maalnsd04e/screenshot%202015-06-11%2010.21.24.png?dl=0

if require other modules, instance require(“path”) ok require(“fs”) returns empty object see declared inside node.d.ts in same way (“path” , “fs” modules) have tried different versions of node.d.ts , node.js (0.10 - 0.12) maybe know how solve issue?

for nodejs compile typescript commonjs module format i.e. 

tsc app.ts --module commonjs

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