Angular – How to change mat-icon size in Material

In Angular 2 you can subscribe (Rx event) to a Router instance. So you can do things like

class MyClass {
  constructor(private router: Router) {
    router.subscribe((val) => /*whatever*/)
  }
}

Edit (since rc.1)

class MyClass {
  constructor(private router: Router) {
    router.changes.subscribe((val) => /*whatever*/)
  }
}

Edit 2 (since 2.0.0)

see also : Router.events doc

class MyClass {
  constructor(private router: Router) {
    router.events.subscribe((val) => {
        // see also 
        console.log(val instanceof NavigationEnd) 
    });
  }
}

Override the font size of mat-icon using either of the options. (I changed md- to mat- for the newest AM version)

---

For Angular Material 8+, add the following in the components stylesheet:

.mat-icon{
    height:48px !important;
    width:48px !important;
    font-size:48px !important;
}

Demo

---

For previous versions, add ::ng-deep to reach that class deep in the host. The width and the height should be also set to adjust the backdrop size proportionally.

HTML:

<button mat-button>    
  <mat-icon class="material-icons">play_circle_filled</mat-icon>
</button>

CSS

::ng-deep .mat-icon{
    height:48px !important;
    width:48px !important;
    font-size:48px !important;
}

Check out the Demo

---

Or, if you avoid `::ng-deep`, use `ViewEncapsulation.None` (but use sparingly):

Class:

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

@Component({
  encapsulation: ViewEncapsulation.None
})

Then you can style directly from the component stylesheet.

CSS:

.mat-icon{
    height:48px !important;
    width:48px !important;
    font-size:48px !important;
}

Demo

---

Or style it from the main stylesheet, styles.css:

styles.css

.mat-icon{
    height:48px !important;
    width:48px !important;
    font-size:48px !important;
}

Demo

---

And last, but not the least solution, styling can be done inline:

HTML:

<button mat-button>    
  <mat-icon style="
    height:48px !important;
    width:48px !important;
    font-size:48px !important;" class="material-icons">play_circle_filled</mat-icon>
</button>

Demo