condition inside map array - React Native

Federico Matias Bais — Thu, 11 Jul 2019 17:42:06 +0000

Hi i want to login with a local data array but i cant get an error alert when the username and password is worng. please can you guide me?

constructor (props) {
    super(props);
    this.state = {

        username: '',
        password: '',
        login:2,

    };
}

onButtonPress = () => {

          data.map((dataItem) =>{
            if(dataItem.user == this.state.username && dataItem.pass == this.state.password  ){

this.setState({ login: 1 }, () => {

    Alert.alert("Welcome");
    this.props.navigation.navigate("Home");



});

}

         }  )


         if (this.state.login = 2) {
             Alert.alert("Error");

         }



          }

DEV Community: Federico Matias Bais