_slide-toggle-theme.scss

@import '@material/switch/mixins.import';
@import '@material/switch/variables.import';
@import '@material/form-field/mixins.import';
@import '@material/ripple/variables.import';
@import '@material/theme/functions.import';
@import '../mdc-helpers/mdc-helpers';

@mixin mat-mdc-slide-toggle-theme($theme) {
  $primary: mat-color(map-get($theme, primary));
  $accent: mat-color(map-get($theme, accent));
  $warn: mat-color(map-get($theme, warn));

  // Save original values of MDC global variables. We need to save these so we can restore the
  // variables to their original values and prevent unintended side effects from using this mixin.
  $orig-mdc-switch-baseline-theme-color: $mdc-switch-baseline-theme-color;

  @include mat-using-mdc-theme($theme) {
    $mdc-switch-baseline-theme-color: primary !global;

    @include mdc-form-field-core-styles($query: $mat-theme-styles-query);

    // MDC's switch doesn't support a `color` property. We add support
    // for it by adding a CSS class for accent and warn style.
    .mat-mdc-slide-toggle {
      .mdc-switch__thumb-underlay::before, .mat-ripple-element {
        background: $mdc-switch-toggled-off-ripple-color;
      }

      &.mat-primary {
        @include mdc-switch-without-ripple($query: $mat-theme-styles-query);
      }

      &.mat-accent {
        $mdc-switch-baseline-theme-color: secondary !global;
        @include mdc-switch-without-ripple($query: $mat-theme-styles-query);
      }

      &.mat-warn {
        $mdc-switch-baseline-theme-color: error !global;
        @include mdc-switch-without-ripple($query: $mat-theme-styles-query);
      }
    }

    // The ripple color matches the palette only when it's checked.
    .mat-mdc-slide-toggle-checked {
      .mdc-switch__thumb-underlay::before, .mat-ripple-element {
        background: $primary;
      }

      &.mat-accent {
        .mdc-switch__thumb-underlay::before, .mat-ripple-element {
          background: $accent;
        }
      }

      &.mat-warn {
        .mdc-switch__thumb-underlay::before, .mat-ripple-element {
          background: $warn;
        }
      }
    }
  }

  // Restore original values of MDC global variables.
  $mdc-switch-baseline-theme-color: $orig-mdc-switch-baseline-theme-color !global;
}

@mixin mat-mdc-slide-toggle-typography($config) {
  @include mat-using-mdc-typography($config) {
    @include mdc-switch-without-ripple($query: $mat-typography-styles-query);
    @include mdc-form-field-core-styles($query: $mat-typography-styles-query);
  }
}