Error encountered in typescript when trying to implement the Material UI theme.palette.type

Just starting out with Material UI and TypeScript, any tips for a newcomer like me? P.S. I'm sorry if my question formatting isn't quite right, this is my first time on Stack Overflow.

https://i.stack.imgur.com/CIOEl.jpg https://i.stack.imgur.com/36LJT.jpg

Answer №1

Category only allows for the specific strings 'cat' and 'dog'. This is in contrast to the general string type, as explained in this article.

The initial value passed to createVariable is a literal type, however, JavaScript expands the return type of function expressions. Essentially, the variable type becomes a string type.

createVariable is a flexible function where you can specify types to avoid the type expansion

const [type, setType] = createVariable<'cat' | 'dog'>('dog')

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