"export 'DOCUMENT' was not found in '@angular/platform-browser'

Question

Happened while trying to upgrade IONIC app from version 3 to 4

Updated all plugins and modules to latest available, without any luck.

ERROR in ./node         


        

Answer 1

I faced this issue while migrating to angular 8.x.x .

Actually 'DOCUMENT' has been deprecated from '@angular/platform-browser' and is now part of '@angular/common'.

Older plugins still try to import document from '@angular/platform-browser' . Just check in the .js and .js.map files under 'fesm5' as well as 'fesm2015' folder of the plugin in node_modules section.

Better to update the specific plugin to latest angular compatible version.

In my case troubling plugin was 'ngx-clipboard'.

Answer 2

inside this "\node_modules\ionic-angular\module.js" && app.js file we can't change if we are changing manuvally it dosent take;

so i suggest BehaviorSubject of angular functionality we can get componet changing values in any other component

page.ts // component

import { BehaviorSubject } from 'rxjs';

public status = new BehaviorSubject('');
  currentStatus = this.status.asObservable()

; // write this code inside the export class services

changeStatus(status){
  console.log('current status from common services:',status)
  this.status.next(status); // pass value to public observable variable
  }

you can subscribe response in other componet

Answer 3

It appears that you may be trying to upgrade your Ionic project from v3 to v4 inline rather than creating a new v4 project and migrating your old code over.

See the migration guide: https://ionicframework.com/docs/building/migration. Specifically this advice:

While migrating an app to take advantage of this new layout, it is suggested that a new project "base" is made with the CLI. Then, with the new project layout, migrate the features of the app piece by piece. Pages/components/etc. should be moved into the src/app/ folder.

If you are trying this by keeping your code in place and installing @ionic/angular in the current project rather than creating a NEW project and then copying code over feature by feature, then you are going to run into a lot of problems. If you are doing that, I suggest starting over employing the strategy outlined above. Having done a few of these myself, that is by far your best option.

Answer 4

DOCUMENT is removed from @angular/platform-browser If you use DOCUMENT from @angular/platform-browser, you should start to import this from @angular/common.

until the repo gets it fixed, you can do as below to fix it for you...

IN

\node_modules\ionic-angular\components\app\app.js

Replace

import { DOCUMENT, Title } from '@angular/platform-browser';

with

import { DOCUMENT } from '@angular/common';
import { Title } from '@angular/platform-browser';

And IN

\node_modules\ionic-angular\module.js

Replace

import { DOCUMENT, HAMMER_GESTURE_CONFIG } from '@angular/platform-browser';

With

import { DOCUMENT } from '@angular/common';
import { HAMMER_GESTURE_CONFIG } from '@angular/platform-browser';