Here's an alternative solution for Angular 5.1+/Angular Material 5.0+.
*Edit: As noted, this still works in Angular 7+.
Working editable example - https://stackblitz.com/edit/dynamic-material-theming
In theme.scss, include a default theme(notice it isn't kept under a class name - this is so Angular will use it as the default), and then a light and dark theme.
theme.scss
@import '~@angular/material/theming';
@include mat-core();
// Typography
$custom-typography: mat-typography-config(
$font-family: Raleway,
$headline: mat-typography-level(24px, 48px, 400),
$body-1: mat-typography-level(16px, 24px, 400)
);
@include angular-material-typography($custom-typography);
// Default colors
$my-app-primary: mat-palette($mat-teal, 700, 100, 800);
$my-app-accent: mat-palette($mat-teal, 700, 100, 800);
$my-app-theme: mat-light-theme($my-app-primary, $my-app-accent);
@include angular-material-theme($my-app-theme);
// Dark theme
$dark-primary: mat-palette($mat-blue-grey);
$dark-accent: mat-palette($mat-amber, A200, A100, A400);
$dark-warn: mat-palette($mat-deep-orange);
$dark-theme: mat-dark-theme($dark-primary, $dark-accent, $dark-warn);
.dark-theme {
@include angular-material-theme($dark-theme);
}
// Light theme
$light-primary: mat-palette($mat-grey, 200, 500, 300);
$light-accent: mat-palette($mat-brown, 200);
$light-warn: mat-palette($mat-deep-orange, 200);
$light-theme: mat-light-theme($light-primary, $light-accent, $light-warn);
.light-theme {
@include angular-material-theme($light-theme)
}
In the app.component file, include OverlayContainer from @angular/cdk/overlay. You can find Angular's documentation for this here https://material.angular.io/guide/theming; though their implementation is a little different. Please note, I also had to include OverlayModule as an import in app.module as well.
In my app.component file, I also declared @HostBinding('class') componentCssClass; as a variable, which will be used to set the theme as a class.
app.component.ts
import {Component, HostBinding } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { OverlayContainer} from '@angular/cdk/overlay';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css'],
})
export class AppComponent {
constructor(public overlayContainer: OverlayContainer) {}
@HostBinding('class') componentCssClass;
onSetTheme(theme) {
this.overlayContainer.getContainerElement().classList.add(theme);
this.componentCssClass = theme;
}
}
app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { HttpClientModule } from '@angular/common/http';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MatCardModule } from '@angular/material/card';
import { MatButtonModule } from '@angular/material/button';
import { AppComponent } from './app.component';
import { OverlayModule} from '@angular/cdk/overlay';
@NgModule({
declarations: [
AppComponent,
],
imports: [
BrowserModule,
HttpClientModule,
BrowserAnimationsModule,
MatCardModule,
MatButtonModule,
OverlayModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule {}
Finally, call the onSetTheme function from your view.
app.component.html
<button mat-raised-button color="primary" (click)="onSetTheme('default-theme')">Default</button>
<button mat-raised-button color="primary" (click)="onSetTheme('dark-theme')">Dark</button>
<button mat-raised-button color="primary" (click)="onSetTheme('light-theme')">Light</button>
You might consider using an observable so that the functionality would be more dynamic.
