I recently had the opportunity to update the quality of logging in an application. Exceptions were handled well, but it was hard to see the values passed through the layers.
I ended up using a Roslyn CodeFix to add a ToString method.

I ran across MediatR the other day while looking into the command pattern. I’ve been working a lot with micro-services. So I wanted to see how I could use the Command Pattern in Web API 2 with MediatR and Ninject.

I’ve been getting back into React.js development and was missing the rich developer experience visual studio gives you with things like intellisense.

I thought I had something working as Ctrl+Space opened intellisense with a sensible suggestion, but this turned out to be the IDE using what I’d typed earlier to make an educated guess. Clever, but I was hoping for more.

Dead Ends

Unfortunately I couldn’t find a simple “how to” guide and the stuff I did get from various github issues and stackoverflow didn’t really help.

After several dead ends and lots of hair pulling I eventually got intellisense working using these steps.

How To Setup Intellisense in VSCode for React.js

Step 1 – Create a jsconfig.json file

With a project folder open, look in the bottom right and you should see a lightbulb:

Click the lightbulb, and you should get a popup at the top of the IDE asking if you want to create a jsconfig.json file

Click “Create jsconfig.json” and vscode should do the rest.

Step 2 – Install Typings

The Typescript Definition Manager typings should be installed globally with

This will allow you to install typescript definition files which is what we’ll do next.

Step 3 – Install React Typescript Definitions

In the folder of the project enter the following commands:

> typings install dt~react --global

You should end up with a new “typings” folder with the following contents:

│   index.d.ts
│
└───globals
    └───react
            index.d.ts
            typings.json

Step 4 – Install typescript

You can install typescript globally, but I prefer to put it in each project with the following command

Which vscode detects automatically, so there’s nothing else to it.

Step 5 – Confirm it Works

Now you should be able to see some intellisense for react.js.

Conclusion

While attempting to get this working I found some what appears to be old and obsolete advice.

• I haven’t created a CODETSJS or VSCODETSJS environment variable
• There are also a couple places mentioning ‘tsd’, but that has been superseded by typings.
• I don’t have (Salsa) in the bottom right of the IDE. In a different setup I had the version number of typescript, but that doesn’t appear to be essential.

In all honestly, I don’t really know what I’m doing, but it appears to work. Hopefully it will work for you too, but please let me know if it doesn’t in a comment below or on twitter.