How to check ETH address is valid or not? Tutorial is here: https://youtu.be/b_GnjbVWSo4

ChecksumAddress.js

const Web3 = require('web3');

class Web3Helper {
  constructor() {
    this.web3 = new Web3();
  }

  isValidAddress = (address) => {
    try {
      this.web3.utils.toChecksumAddress(address);
      return true;
    } catch (ex) {
      console.error(ex);
      return false;
    }
  };
}

const web3Helper = new Web3Helper();
console.log(
  web3Helper.isValidAddress('0xEA9D2766692e47be0c57Abb9C0225Acf33f763e7')
);