The error was happend on JsSignatureProvider of eosjs on React Native

Question

I'm developing the eos wallet app on react native. But it happens the issues like following.

My code is

import { Api, JsonRpc, RpcError } from 'eosjs';
import { JsSignatureProvider } from 'eosjs/dist/eosjs-jssig';

const defaultPrivateKey = ['5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3'];
const signatureProvider = new JsSignatureProvider(defaultPrivateKey);

Then I can see the issue as following

TypeError: priv.getPublicKey is not a function. (In 'priv.getPublicKey()', 'priv.getPublicKey' is undefined)

Please let me know how to fix this issue.