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Custom Theming and SCSS

  1. Open Step 2 in StackBlitz

    We've made some updates to the app for you. We'll recap them now...

  2. Notice that we've added content to each card in the mat-card-content element. You should see the files related to this new Component in /src/app/avatar/. We'll look into those a little later.

    <app-avatar gender="male" [emoji]="defaultBoyEmoji"
            opacity="0.7" fxLayout="column"
            fxLayoutAlign="start center"></app-avatar>

    This app-avatar is a custom element and Angular Component. Custom Elements are detailed in the following article but Angular hides a lot of this complexity from developers. This app-avatar selector is defined in the @Component decorator's selector field.

    This Component takes a number of Inputs as attributes. When the []s are used, this means that the argument is evaluated (i.e. [emoji]="defaultBoyEmoji"), when they aren't used the attribute is just set to the provided string (i.e. gender="male"). Note that the component's class now has fields for defaultBoyEmoji and defaultGirlEmoji.

    In /src/app/add-child/add-child.component.scss, take note that we've replaced some of the values with SCSS variables (i.e. $base-spacing) which is defined in a SASS Partial. You can see that file in /src/_variables.scss.

  3. Take a quick look at /src/app/avatar/avatar.component.ts and ask any questions that you may have. It's a simple component, but it uses a number of interesting features in order to be re-usable.

Global Styles

In many Material Design apps, it is preferable to capitalize the text within buttons. Our app does not currently do this since Angular Material leaves this up to the developer. Now let's make this change globally across our app.

  1. In /src/styles.scss, add:

    .mat-button {
  text-transform: uppercase;
}

    NOTE: You should always style Angular Material components using classes and not elements (i.e. .mat-button vs. mat-button).

Custom Theming

  1. Take a look at the theme definition in /src/_theme.scss.

  2. You can see where the primary and accent themes are defined. They are using the same default indigo and pink theme.

  3. Let's change the theme by modifying to be the following:

    $app-primary: mat-palette($mat-cyan);
$app-accent: mat-palette($mat-pink, 300, 100, 900);

    You should see the impact of the indigo -> cyan change as well as the pink color becoming slightly lighter.

  4. Take a look at /src/app/avatar.component.scss.

  5. We're using the mat-color mixin from Angular Material here to apply a color from our palette to one of our custom elements (rather than an Angular Material component). In this case, it is used to dynamically change the background-color of the card content based on the passed in gender.

You can see the completed step 2 here.