MatDialog stopped working after updating Angular to version 9

问题

I had an angular project which I upgraded from 7.2 to 9 following the https://update.angular.io/#7.2:9.0

Post upgrade everything except MatDialog is working. Opening the dialog shows an empty popup of disproportionate size with the following error in the console.

core.js:3866 ERROR Error: Uncaught (in promise): TypeError: Cannot read property "hasAttached" of undefined
TypeError: Cannot read property "hasAttached" of undefined
    at MatDialogContainer.push../node_modules/@angular/material/esm5/dialog.es5.js.MatDialogContainer.attachComponentPortal (dialog.es5.js:191)
    at MatDialog.push../node_modules/@angular/material/esm5/dialog.es5.js.MatDialog._attachDialogContent (dialog.es5.js:1046)
    at MatDialog.push../node_modules/@angular/material/esm5/dialog.es5.js.MatDialog.open (dialog.es5.js:850)
    at new AppComponent (app.component.ts:67)
    at createClass (core.js:22218)
    at createDirectiveInstance (core.js:22087)
    at createViewNodes (core.js:30632)
    at createRootView (core.js:30546)
    at callWithDebugContext (core.js:31554)
    at Object.debugCreateRootView [as createRootView] (core.js:31064)
    at resolvePromise (zone.js:836)
    at resolvePromise (zone.js:795)
    at zone.js:897
    at ZoneDelegate.invokeTask (zone.js:431)
    at Object.onInvokeTask (core.js:27441)
    at ZoneDelegate.invokeTask (zone.js:430)
    at Zone.runTask (zone.js:198)
    at drainMicroTaskQueue (zone.js:611)
    at ZoneTask.invokeTask [as invoke] (zone.js:517)
    at invokeTask (zone.js:1671)

I have verified from this tutorial https://www.techiediaries.com/angular-material-dialogs/ that the way to use dialog with a custom component is the same. I am not able to provide the actual code because of work policy.

I also tried opting out of ivy thinking if it was the cause of the issue as per this link. But it didn't help.

Did anyone of you also face a similar issue?

回答1:

Problem solved. I had to upgrade Angular Material CDK to 9.1 and change all import references to the new format:

import { MatDialogModule } from '@angular/material/dialog';

All good now!

来源：https://stackoverflow.com/questions/60433353/matdialog-stopped-working-after-updating-angular-to-version-9