How can I find the ABI of a smart contract which is not in ethereum blockchain, but only in my device, using Javascript?

Do you have the source solidity code?

Yes

Are you using truffle or hardhat or some other framework, no framework, or unsure?

No. I would like to calculate the gas price of smart contract which is not on ethereum blockchain.
To calculate it i need to create web3.eth.Contract(ABI,...)

So I'm searching a way to find the ABI of a contract using Javascript.
I find solc but i need to change the version of compiler because some contracts need older version... And from Javascript I Dont know how to change it

Yes, you will need to compile the contract with --abi flag.

Ye but I must do this operation directly in Javascript. And I know how to do that... But before I need to change compiler version... 😱

Are you saying you need to compile from within javascript? If that's the case, then you need solcjs.

Ye sorry. When I wrote solc I mean solcjs

github.com/ethereum/solc-js

I'm using this, but as I said before I don't know a way to change the version of the compiler from js

I believe, if you're code is not dependent on some legacy version of solc, you should not need to specify a version. If you're getting an error when attempting to compile, what is the error?

But there is... solc.loadRemoteVersion