What is the most painful part of using TypeScript?

What is the most painful part of using typescript in general? Handling a value from JavaScript. The reason of having hard times with JavaScript.

What is the most painful part of using TypeScript in general?

Handling a value from JavaScript.

Why?

The reason of having hard times with values coming from an input sources (like an html form) is that you don’t have the exact data type beforehand. I mean, you can’t write functions using the input value which could benefit from TypeScript type system because an input value can be anything at that point, another function, a number, a string, an object, or whatever else. That’s why many programmers try to avoid types using the type called “any” in this case. A software developer with advanced TypeScript knowledge never uses the type “any”, because it would be equal to not using TypeScript at all, just would write native JavaScript.

The question is obvious: *is there any way to put a JavaScript value into the TypeScript context? *The short answer is: yes. For the detailed answer, let’s see an example:

You have an input value — no matter what source it comes from — for which you want to use a TypeScript context. But how can you pass the unknown type of input value to the type system provided by TypeScript? This is an often misunderstood process, although the flow is very simple.

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