Getting Unhandled Promise Rejection Warning on Run and Build command

@sagarkodte wrote:

E:\banana>ionic cordova build android
Running app-scripts build: --platform android --target cordova
[12:36:52] build dev started …
[12:36:54] clean started …
[12:36:54] clean finished in 6 ms
[12:36:54] copy started …
[12:36:56] deeplinks started …
[12:36:56] deeplinks finished in 78 ms
[12:36:56] transpile started …
[12:37:05] transpile finished in 8.36 s
[12:37:05] preprocess started …
[12:37:05] preprocess finished in less than 1 ms
[12:37:05] webpack started …
[12:37:06] copy finished in 11.19 s
[12:37:17] webpack finished in 12.11 s
[12:37:17] sass started …
Witout from option PostCSS could generate wrong source map or do not find Browserslist config. Set it to CSS file path or to undefined to prevent this warning
[12:37:21] sass finished in 3.98 s
[12:37:21] postprocess started …
[12:37:21] postprocess finished in 80 ms
[12:37:21] lint started …
[12:37:21] build dev finished in 28.88 s

cordova build android
[12:37:25] lint finished in 4.35 s
ANDROID_HOME=D:\AndroidSdk
JAVA_HOME=C:\Program Files\java\jdk1.8.0_92
(node:6160) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): [object Object]
(node:6160) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I am getting this error when i hit run and build android.

I wrote below code in auth-service.ts

@Injectable()
export class AuthService {

constructor(public http: Http) {
console.log(‘Hello AuthService Provider’);
}

postData(credentials, type) {
return new Promise((resolve, reject) => {
// let headers = new Headers();
let headers = new Headers({
‘Content-Type’: ‘application/x-www-form-urlencoded’
});
/* let postParams = {

    }*/
    // alert(JSON.stringify(credentials));
  this.http.post(apiUrl + type, "add=1&firstname="+credentials.firstname+"&lastname="+credentials.lastname+"&email="+credentials.email+"&mobile="+credentials.mobile+"&password="+credentials.password, {headers: headers})
    .subscribe(res => {
      resolve(res.json());
    }, (err) => {
      reject(err);
    });
});

}

}

Is it my code issue or something else? stuck here. Please help.

My ionic info is below

cli packages: (C:\Users\HIT\AppData\Roaming\npm\node_modules)

@ionic/cli-utils  : 1.19.0
ionic (Ionic CLI) : 3.19.0

global packages:

cordova (Cordova CLI) : 8.0.0

local packages:

@ionic/app-scripts : 3.1.6
Cordova Platforms  : android 6.2.3
Ionic Framework    : ionic-angular 3.9.2

System:

Android SDK Tools : 26.0.2
Node              : v8.5.0
npm               : 5.3.0
OS                : Windows 10

Environment Variables:

ANDROID_HOME : D:\AndroidSdk\

Misc:

backend : pro

Posts: 1

Participants: 1

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