sign transaction and send signed transaction

[msweb3]

I got error, anyone can help me to give real example to sign transaction without directly sending and send signed transaction ?

Error: Uncaught (in promise) Error: signing transactions is unsupported (operation="signTransaction", code=UNSUPPORTED_OPERATION, version=providers/5.2.0)

Code: https://gist.github.com/msqms/5b7f883c9e3966eba814bc0efca3abc7

[ardislu]

It's not possible to sign a transaction without sending it using MetaMask, refer to this issue for details and more discussion: MetaMask/metamask-extension#3475

We don't and won't support signing a transaction without submitting it, because it becomes a giant footgun in terms of nonce calculation inside MetaMask.

[msweb3]

But I saw, signTransaction and sendSignedTransaction methods, what is this than ?