Template parse errors: 'mat-icon' is not a known element

58
votes

I'm working with Angular CLI and angular material v.5.2.5 and trying to use

mat-icon-button

but such an error produced by the console:

Uncaught Error: Template parse errors: 'mat-icon' is not a known element...

if I use

mat-raised-button

everything works fine cannot figure out how to solve that

index.html

 <!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Todo</title>
  <base href="/">

  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700,400italic"
    rel="stylesheet">
  <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
</head>
<body>
  <app-root></app-root>
</body>
</html>

main.ts

 import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { AppModule } from './app/app.module';
import { environment } from './environments/environment';

if (environment.production) {
  enableProdMode();
}

platformBrowserDynamic().bootstrapModule(AppModule)
  .catch(err => console.log(err));

app.module.ts

 import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { MatButtonModule } from '@angular/material/button';


import { AppComponent } from './app.component';


@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    MatButtonModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }
6
angularangular-material

6 Answers

114
votes

The MatIconModule is missing from your imports.

imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    MatButtonModule,
    MatIconModule, // <-- here
],
20
votes

I am using Angular 6. and I made a different file called material.module.ts where I keep all the mat Module dependencies. You can call this material.module.ts file in app.module.ts file It will work.When i added the 'MatIconModule' into my code It works for me.

here is my code.

material.module.ts

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';

import {MatButtonModule,MatCheckboxModule,MatToolbarModule,MatInputModule,MatProgressSpinnerModule,MatCardModule,MatMenuModule, MatIconModule} from '@angular/material';


@NgModule({
  imports: [MatButtonModule, MatCheckboxModule,MatToolbarModule,MatInputModule,MatProgressSpinnerModule,MatCardModule,MatMenuModule,MatIconModule],
  exports: [MatButtonModule, MatCheckboxModule,MatToolbarModule,MatInputModule,MatProgressSpinnerModule,MatCardModule,MatMenuModule, MatIconModule]
})


export class MaterialModule{}

and app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';

import { MaterialModule } from './material.module';


@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    MaterialModule,
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }
15
votes

In Angular 9 or greater you should

import { MatIconModule } from '@angular/material/icon'

and then

imports: [
    // other imports...
    MatIconModule, // <-- here
],
3
votes
import {MatIconModule} from '@angular/material';// this must add to app module.ts

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    BrowserAnimationsModule,
    MatSliderModule,
    MatButtonModule,
    MatCheckboxModule,
    MatIconModule // this must add to app module.ts
  ],
3
votes

If you set the modules and imported correctly still it does not work you can try this turn off the serve(Ctrl+C) and again start the server.

0
votes

It also might happen that your app.module.ts or corresponding .module.ts file doesn't compile. If there are errors it will just throw out this error message instead of telling that there is an error in the module itself. Check out the related files for any issues with imports or code.