javascript - How to do Email validation using Regular expression in Typescript

I have an requirement to validate email and date fields from an
Excel file using typescript Angular app.

And I
am trying to validate using regular expression but the result returns always false for a
correct email address.

Can anyone
help me to validate the email and dates?

Below
is the code I have
written

Component:

import
            { Component } from '@angular/core';
import * as FileSaver from
            'file-saver';
import * as XLSX from 'xlsx';

import
            {UploadService} from
            '../services//upload.service';


import { FileUploader
            ,FileItem,ParsedResponseHeaders,FileLikeObject} from
            'ng2-file-upload';

import { SpotCheck } from
            '../models/SpotCheckFields'; 

@Component ({ 
 selector:
            'my-app', 
 templateUrl:'./excelUpload.html',


            providers:[UploadService]
}) 

export class
            ExcelUploadComponent { 

 public SpotChecklist:
            SpotCheck[];
 public project_master:any[];


            uploader:FileUploader;


 constructor(private
            uploadservice: UploadService ){
 this.SpotChecklist=[];

            this.project_master=[];
 }
 ngOnInit(): void {

            this.uploader = new FileUploader({
 url:
            'http://localhost:5000/upload'
 // headers: [{name:'Accept',
            value:'application/json'}],
 // autoUpload: true,

            });

 this.uploader.onErrorItem = (item, response, status, headers)
            => this.onErrorItem(item, response, status, headers);

            this.uploader.onSuccessItem = (item, response, status, headers) =>
            this.onSuccessItem(item, response, status, headers);

 // retrieve
            projectmaster details
 this.getProjectMaster("","SELECT PROJECT
            MASTER");
 }

 onSuccessItem(item: FileItem, response:
            string, status: number, headers: ParsedResponseHeaders): any {

            //console.log("onSuccessItem " + status, response, item); 
 this.SpotChecklist
            = JSON.parse(response); //success server response


 var
            data = this.validateRow(this.SpotChecklist);

 console.log(data);
            
 }

 onErrorItem(item: FileItem, response: string,
            status: number, headers: ParsedResponseHeaders): any {
 let error =
            JSON.parse(response); //error server response

            }


 validateRow(lst:any[]) : SpotCheck[]

            {
 var i:number;
 for(i=0;i
            {
 var validation_message:string="";
 var
            blnErrOccured:boolean=false;


            if(!this.isEmail(lst[i].RESPONSIBLE_PERSON_EMAIL_ID))
 {


            validation_message=validation_message+ "," +"RESPONSIBLE_PERSON_EMAIL_ID is
            invalid"
 blnErrOccured=true;
 }


            lst[i].VALIDATION_RESULT=validation_message;
 }
 return
            lst;
 }

 isDate(date:string) {

 //
            return (new Date(date) !== "Invalid Date") && !isNaN(new Date(date));

            }

 isEmail(search:string):boolean
 {
 var
            serchfind:boolean;

 regexp = new
            RegExp('/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/');


            serchfind = regexp.test(search);



            console.log(serchfind)
 return serchfind
 }


            getProjectMaster(project_code:string,Flag:string):any
 { 

            this.uploadservice.getProjectMaster(project_code,Flag).subscribe(

            response=> {
 this.project_master= response[0];


            return response;
 },
 error=> {
 console.log("ERROR:
            ",error);
 console.log(error.json()); //gives the object object

            },
 () => {
 console.log("Completed");
 }

            );

 }
}

Answer

Problem is with the regex format given. Give
it without quotes (') like
this

regexp = new
            RegExp(/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/);