• 1 min

Declare Missing Helper Function (TypeScript) in Visual Studio Code

Declare Missing Helper Function (TypeScript) in Visual Studio Code
Table of Content

As I was reading the “Announcing TypeScript 4.2” post on the TypeScript blog, I discovered a neat feature that is so simple but super valuable to me, so I love to share it here 😁

How does it work?

When you call a function with parameters in a TypeScript file in Visual Studio Code, you get an ugly red line.

If you click the yellow balloon, you can generate a function declaration with typed parameters! Alexander Trasyk builds this feature 💪.

Is there any feature you have discovered lately? Please share them 👍

If you are looking for great Visual Studio Code tips for TypeScript development? Check “Tips for Coding TypeScript with VSCode” by Fernando Doglio 👍


After reading this post, I hope you learned something new or are inspired to create something new! 🤗

If I left you with questions or something to say as a response, scroll down and type me a message. Please send me a DM on Twitter @DevByRayRay when you want to keep it private. My DM’s are always open 😁


I’m Ray, a Frontend Developer since 2009 living in the Netherlands. I write about Frontend Development, JavaScript, TypeScript, Angular, CSS, VueJS and a lot more related topics.

Want to reach me for comments or questions on my blog? Send a DM on Twitter @DevByRayRay