TokenMetadata not an export? ...just following the code in docs

I am following the Solana docs: "Example: Create a mint with metadata"using Javascript.

Why does an error say that "TokenMetadata" is not an export"?

It also said that this kind of action is only allowed in typescript, which I would rather not use. Is there an option for Javascript and why is it saying "not an export"? I used the entire exact code in the Solana docs and imported all required including from @solana/spl-token-metadata(referring to the code piece below):

 const metadata: TokenMetadata = {    mint: mint.publicKey,    name: 'TOKEN_NAME',    symbol: 'SMBL',    uri: 'URI',    additionalMetadata: [['new-field', 'new-value']],  };