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Using Node Wallet

If Ethereum node has unlocked account in its wallet you can send transaction without need of signing locally in web3.js

danger

Using web3.eth.personal is not considered secure and is strongly discouraged. The personal RPC endpoints have been deprecated due to significant security issues. More info: geth.ethereum.org

Transaction​

// First step: initialize web3 instance
import { Web3 } from 'web3';
const web3 = new Web3(/* PROVIDER*/);

// Second step: add an account to the Ethereum node and unlock it
const account = {
	privateKey: 'privateKey',
	address: '0xe4beef667408b99053dc147ed19592ada0d77f59',
};

// if you use ganache backend, use a private key with 0x
await web3.eth.personal.importRawKey(account.privateKey);
// if you use geth backend, use a private key without 0x
await web3.eth.personal.importRawKey(account.privateKey.slice(2));

// unlock account
await web3Personal.unlockAccount(account.address, 'anyPassword', 100000000);
// Make sure the account has enough eth on balance to send the transaction

// Third step: sign and send the transaction
try {
	const receipt = await web3.eth.sendTransaction({
		from: account.address,
		to: '0xe4beef667408b99053dc147ed19592ada0d77f59',
		value: '0x1',
		gas: '300000',
		// other transaction's params
	});
} catch (error) {
	// catch transaction error
	console.error(error);
}

List of references:

Contract Deployment​

// First step: initialize web3 instance
import { Web3 } from 'web3';
const web3 = new Web3(/* PROVIDER*/);

// Second step: add an account to the Ethereum node and unlock it
const account = {
	privateKey: 'privateKey',
	address: '0xe4beef667408b99053dc147ed19592ada0d77f59',
};

// if you use ganache backend, use a private key with 0x
await web3.eth.personal.importRawKey(account.privateKey);
// if you use geth backend, use a private key without 0x
await web3.eth.personal.importRawKey(account.privateKey.slice(2));

// unlock account
await web3.eth.personal.unlockAccount(account.address, 'anyPassword', 100000000);
// Make sure the account has enough eth on balance to send the transaction

// Third step: sign and send the transaction
try {
	// deploy
	const contract = new web3.eth.Contract(ContractAbi);
	const contractDeployed = await contract
		.deploy({
			input: ContractBytecode,
			arguments: ['Constructor param1', 'Constructor param2'],
		})
		.send({
			from: account.address,
			gas: '1000000',
			// other transaction's params
		});

	// call method
	await contractDeployed.methods
		.transfer('0xe2597eb05cf9a87eb1309e86750c903ec38e527e', '0x1')
		.send({
			from: account.address,
			gas: '1000000',
			// other transaction's params
		});
} catch (error) {
	// catch transaction error
	console.error(error);
}

List of references: