getContract.js

const getContract = async (web3) => {
  const data = await $.getJSON("./contracts/Greeting.json");

  const netId = await web3.eth.net.getId();
  const deployedNetwork = data.networks[netId];
  const greeting = new web3.eth.Contract(
    data.abi,
    deployedNetwork && deployedNetwork.address
  );
  return greeting;
};