await contract.methods.set(5).send({ from: accounts[0] });

contract.methods.set(51).send({ from: accounts[0] }).then((error, tranasctionHash)=>{alert(tranasctionHash);});

contract.methods.set(51).send({ from: accounts[0] }, (error, tranasctionHash)=>{alert(tranasctionHash);});

const response = await contract.methods.get().call();

this.setState({ storageValue:response});

this.setState({ storageValue:this.state.web3.utils.hexToNumber(this.state.web3.utils.toHex(response))});