Http post Request error *No access control origin * in ionic

Ionic Framework ionic-v3
4

@sabarinathen

function()
{
 var headers = new Headers();
    headers.append('Access-Control-Allow-Origin' , '*');
    headers.append('Access-Control-Allow-Methods', 'POST, GET, OPTIONS, PUT');
    headers.append('Accept','application/json');
    headers.append('content-type','application/json');
     let options = new RequestOptions({ headers:headers,withCredentials: true});

return this.http.post(this.url, postParams, options).do( res => console.log(res)); 

}

Hope, this will solve your issue