Today we discuss StringToUnion
Type transformations are useful for different types of tasks.
We already discussed:
Let’s go 🚀
Let’s start from the first character:
We cannot extract it using indices as we get
string. Instead let’s apply Type inference in conditional types:
Next step is to put other characters into a union.
As we already can get first character, let’s apply it recursively:
On the final step where we have an empty string, it converts to
If we deal with a union type,
never is the type when we have no elements in it. But if we put any element in it,
never will be removed from it:
That’s it 💫
Don’t forget to check the final solution on Playground – https://tsplay.dev/N7bXqw
Have a wonderful weekend ☀️typescriptmedium