无法绑定到“matDatepicker”，因为它不是“输入”的已知属性

Question

I am going to use a material date picker controller. But it shows an error. Of course, I added MatDatepickerModule in app.module.ts file. Let me show you some parts of my code here:

import { MatDatepickerModule } from '@angular/material/datepicker';
...
@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        AppRoutingModule,
        ...,
        MatDatepickerModule,
        SharedModule.forRoot(),
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule {}

This is html code:

<mat-form-field appearance="fill">
              <mat-label>Event start time</mat-label>
              <input matInput [matDatepicker]="picker">
              <mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
              <mat-datepicker #picker></mat-datepicker>
            </mat-form-field>

And below is the error log:

Error: src/app/.../test.component.html:67:31 - error NG8002: Can't bind to 'matDatepicker' since it isn't a known property of 'input'.

67               <input matInput [matDatepicker]="picker">

What I missed?

Answer 1

You have to import MatDatepickerModule where your components are declared.

@NgModule({
    declarations: [
        AppComponent //Date picker is only available in this component
    ],
    imports: [
        ...
        MatDatepickerModule
    ]
})
export class AppModule {}

Assuming you have hallway.module

@NgModule({
    declarations: [
        HallwayComponent
    ],
    imports: [
        ...
        MatDatepickerModule //Import it here too, to make it available in Hallway component
    ]
})
export class HallwayModule {}

You can also create shared.module or material-shared.module and import material components in it and import this shared module in every module wherever required.