extensions/amp-story/1.0/amp-story-system-layer.js
/**
   * Reacts to system UI visibility state updates.
   * @param {boolean} isVisible
   * @private
   */
Reacts to system UI visibility state updates.
@param {boolean} isVisible
@private
Reacts to system UI visibility state updates . @param { boolean } isVisible @private
onSystemUiIsVisibleStateUpdate_(isVisible) {
    this.vsync_.mutate(() => {
      this.getShadowRoot().classList.toggle(
        'i-amphtml-story-hidden',
        !isVisible
      );
    });
  }
onSystemUiIsVisibleStateUpdate_ ( isVisible ) { this . vsync_ . mutate ( ( ) => { this . getShadowRoot ( ) . classList . toggle ( 'i-amphtml-story-hidden' , ! isVisible ) ; } ) ; }
Reacts to system UI visibility state updates.
Reacts to system UI visibility state updates .