Fix: Visual Studio doesn’t use or can’t find TypeScript typings (*.d.ts) in a .net core project


I added some TypeScripts typings to a .net core project in Visual Studio 2015  (version 14.0.25123.00 Update 2), by using the NPM package “typings”, but the added *.d.ts files, were not picked up by Visual Studio, this was caused by excluding the “wwwroot” folder in the tsconfig.json,


after removing the wwwroot folder from the exclude array, the typings were correctly found and used.




  "compileOnSave": true,
  "compilerOptions": {
    "module": "system",
    "noImplicitAny": false,
    "noEmitOnError": true,
    "removeComments": false,
    "sourceMap": true,
    "target": "es6"
  "exclude": [

     "wwwroot" <========================= Remove the wwwroot

Yes, Yes–Integrated Terminal in Visual Studio Code


The killer feature I was missing in Visual Studio Code was a integrated terminal.


More and more I use the command line for all kinds of tasks, but I don’t want to leave my editor, so I’m very glad that the visual studio code team decided to create a integrated terminal, currently it can only by found in the insiders builds, but a stable release containing the integrated terminal is on it’ s way.


To open the integrated terminal hit CTRL + `.


Event the shortcut is convenient Smile.


So to install all the npm packages in your project just hit CTRL + ` and enter npm install:



Some nice new features are coming to TypeScript


npm for type definition files

One of the things that annoyed me was the tsd tool for installing type definition files.

Why can’t I just use npm, for installing type definition files. I use npm for installing external libraries en tooling so why not type definition files.


Well they are working on just that, kudos to the TypeScript thing.


Non nullable types

An other thing is non nullable types, I certainly want to have that in TypeScript.

It will be possible to tell the compiler, a certain variable is a string and not null or undefined. But you can also write: const x : string | null which means, x is a string or null but not undefined.


Down level async await support

TypeScript code which uses async await can target ES5

How to convert a function definition as string to code in JavaScript


Just a snippet for converting a function as string to code:




<!doctype html>
    <meta charset=”utf-8″ />
    <meta http-equiv=”x-ua-compatible” content=”ie=edge”>
    <meta name=”description” content=”A page to quickly spike some code or styling.”>
    <meta name=”viewport” content=”width=device-width, initial-scale=1″>
    <link rel=”icon” href=”data:;base64,iVBORw0KGgo=”>   
        // Define a function as a string.
        // Don’t forget the “(” and the “)” arround the function.
        // See:
        var functionAsString = “(function(a, b){ return a + b; })”;

        // Convert a string containing a function definition to a real function.
        var fn = eval(functionAsString);

        // Execute the created function.
        var result = fn(1, 2);

        // Log result is: 3