"moment" has no exported member 'default'

Question

I'm using moment.js to change the local date format for my application but getting the following error:

"moment" has no exported member 'default' when importing the library.

Below is my code:

import {Inject, Injectable, Optional} from '@angular/core';
import {DateAdapter, MAT_DATE_LOCALE, MatDateFormats} from '@angular/material';
import * as _moment from 'moment';
import {default as _rollupMoment, Moment} from 'moment';

const moment = _rollupMoment || _moment;

Praemunire

Refer this – Septuple

Version of moment? – Jeter

@dileepkumarjami "moment": "^2.24.0" – Praemunire

Did you try adding the above ? – Jeter

@dileepkumarjami Thanks you for the quick replay - added just , but still error exist - one improvement is now it's not showing any redline for default keyword I'm using – Praemunire

Try to re-run your project after trying @dileepkumarjami's suggestion, because it's necessary when you change tsconfig.json – Septuple

@dileepkumarjami - you are right needs to recompile i think :) thanks it's working – Praemunire

Answer 1

Try adding "allowSyntheticDefaultImports": true to your tsconfig.json under the "compilerOptions"

Jeter

adding in tsconfig yes, but in which part of the tsconfig? root? compilerOptions? lib? – Diviner

In the compilerOptions section – Fifty

adding to tsconfig.app.json worked, not tsconfig.json – Ferrigno

this solution worked for me in Angular 14. I had issues with wagmi/core – Jabiru

Also you have to importing moment >> import moment from 'moment'; – Neuropath

Answer 2

You seems to have trouble importing moment

As you can see in the documentation, For Typescript 2.x try adding "moduleResolution": "node" in compilerOptions in your tsconfig.json file and then use any of the below syntax:

import * as moment from 'moment';
import moment = require('moment');

PS: Make sure you have installed moment.js with npm:

npm install --save moment

Hines

I'm having problem with word 'default'. – Praemunire

Answer 3

Here you go with a complete solution to this problem:

First:

 npm install moment --save
 npm install @angular/material-moment-adapter

Second:

in your package.json under dependencies make sure you have the following code:

    "@angular/material-moment-adapter": "^8.2.3",

Third:

in your tsconfig.json file under compileroptions add the following:

"allowSyntheticDefaultImports": true

Forth:

Modify your component with the following codes:

import { MomentDateAdapter } from '@angular/material-moment-adapter';
import { DateAdapter, MAT_DATE_FORMATS, MAT_DATE_LOCALE } from '@angular/material/core';
import * as _moment from 'moment';
import { default as _rollupMoment } from 'moment';

const moment = _rollupMoment || _moment;
export const MY_FORMATS = {
parse: {
  dateInput: 'LL',
},
display: {
  dateInput: 'YYYY-MM-DD',
  monthYearLabel: 'YYYY',
  dateA11yLabel: 'LL',
  monthYearA11yLabel: 'YYYY',
 },
};

@Component({
 selector: 'app-newsfeedform',
 templateUrl: './newsfeedform.component.html',
 styleUrls: ['./newsfeedform.component.css'],
 providers: [
  { provide: DateAdapter, useClass: MomentDateAdapter, deps: [MAT_DATE_LOCALE] },

  { provide: MAT_DATE_FORMATS, useValue: MY_FORMATS },
],
})

Fifth:

In your component.html file datepicker like bellow code:

     <mat-form-field appearance="outline" fxFlex>
                    <input matInput [matDatepicker]="publishdate" placeholder="Publish Date"
                        formControlName="publishdate">
                    <mat-datepicker-toggle matSuffix [for]="publishdate"></mat-datepicker-toggle>
                    <mat-datepicker #publishdate></mat-datepicker>
                </mat-form-field>

That is it you can customize Angular material datepicker any format you want just modify the format given above.

Protoxylem

Answer 4

Add the following line in the tsconfig.json file:

"allowSyntheticDefaultImports": true

Inelegance

Answer 5

in gulpfile.js in externals section add 'moment/moment' and 'moment' both

externals: [
      'moment/moment',
       'moment'
   ]

Dismissal