MatIconModule import/export

I am working on Angular 4 project with Angular Material.

I have this screen, where I used to have Material Cards and Material Icons.

I just handle the import/export of MatCardModule. The card is display, fine. And I add a Material Icon. The icon is display too, however I don't handle the import/export of MatIconModule.

Here is a plunker: https://plnkr.co/edit/UOxDkqmWjg0uu5QNrl7c?p=preview

main.ts file :

import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {BrowserModule} from '@angular/platform-browser';
import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
import {NgModule} from '@angular/core';
import {MatCardModule} from '@angular/material';
import {CardOverviewExample} from './card-overview-example';

@NgModule({
declarations: [CardOverviewExample],
imports: [
BrowserModule,
BrowserAnimationsModule,
MatCardModule
],
exports: [
MatCardModule
],
bootstrap: [CardOverviewExample]
})
export class PlunkerAppModule {}

platformBrowserDynamic().bootstrapModule(PlunkerAppModule);


card-overview-example.ts file :

import {Component} from '@angular/core';

@Component({
selector: 'card-overview-example',
template: `
<mat-card>Simple card</mat-card>

<mat-icon class="material-icons" aria-hidden="true">
important_devices
</mat-icon>
`
})
export class CardOverviewExample {}


I don't need Material Cards anymore, so I comment the declaration in HTML file and imports/exports of the module.

My code is break. Errors in console say that mat-icon is not a know element.

Here is a plunker: https://plnkr.co/edit/UvhxpOkOWhaMKX2tkb7A?p=preview

main.ts file :

import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {BrowserModule} from '@angular/platform-browser';
import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
import {NgModule} from '@angular/core';
//import {MatCardModule} from '@angular/material';
import {CardOverviewExample} from './card-overview-example';

@NgModule({
declarations: [CardOverviewExample],
imports: [
BrowserModule,
BrowserAnimationsModule,
//MatCardModule
],
exports: [
//MatCardModule
],
bootstrap: [CardOverviewExample]
})
export class PlunkerAppModule {}

platformBrowserDynamic().bootstrapModule(PlunkerAppModule);


card-overview-example.ts file :

import {Component} from '@angular/core';

@Component({
selector: 'card-overview-example',
template: `
<!-- <mat-card>Simple card</mat-card> -->

<mat-icon class="material-icons" aria-hidden="true">
important_devices
</mat-icon>
`
})
export class CardOverviewExample {}


Yes, of course. If I handle the import/export of MatIconModule, the icon is display, fine.

Here is a plunker: https://plnkr.co/edit/Mn12NIuES35G2xOB0CrA?p=preview

main.ts file :

import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {BrowserModule} from '@angular/platform-browser';
import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
import {NgModule} from '@angular/core';
import {MatIconModule} from '@angular/material';
import {CardOverviewExample} from './card-overview-example';

@NgModule({
declarations: [CardOverviewExample],
imports: [
BrowserModule,
BrowserAnimationsModule,
MatIconModule
],
exports: [
MatIconModule
],
bootstrap: [CardOverviewExample]
})
export class PlunkerAppModule {}

platformBrowserDynamic().bootstrapModule(PlunkerAppModule);


card-overview-example.ts file :

import {Component} from '@angular/core';

@Component({
selector: 'card-overview-example',
template: `
<!-- <mat-card>Simple card</mat-card> -->

<mat-icon class="material-icons" aria-hidden="true">
important_devices
</mat-icon>
`
})
export class CardOverviewExample {}


But why I didn't need the handle of import/export MatIconModule while I use MatCardModule ?

Continue reading...