问Web3.eth.getAccoutns()在更新后不起作用

EN

window.addEventListener('load', function () {
  if (typeof web3 !== 'undefined') {
    console.log('Web3 injected browser: OK.')
    Web3.providers.HttpProvider.prototype.sendAsync = Web3.providers.HttpProvider.prototype.send;

    window.web3 = new Web3(window.web3.currentProvider)
  } else {
    console.log('Web3 injected browser: Fail. You should consider trying MetaMask.')
    // fallback - use your fallback strategy (local node / hosted node + in-dapp id mgmt / fail)
    Web3.providers.HttpProvider.prototype.sendAsync = Web3.providers.HttpProvider.prototype.send;

    window.web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:8545'))
  }

        window.web3.eth.getAccounts((err, res) => {  
          if (err){
            console.log("error")
            console.log(err)
          }                 
          console.log(res[0]);
});