In order to extend from mixinBehaviors, it is necessary to define the class as such:
@customElement('slide-animatable') export default class SlideAnimatable extends (mixinBehaviors([NeonAnimatableBehavior], PolymerElement) as new () => PolymerElement) {}
Without the type assertion, TypeScript gives the following error:
C:\Users\mike\Documents\GitHub\screensaver\app\elements\slide-animatable\slide-animatable.ts(17,1): error TS2345 Argument of type 'typeof SlideAnimatable' is not assignable to parameter of type '(new () => PolymerElement) & ElementConstructor'.
In order to extend from mixinBehaviors, it is necessary to define the class as such:
@customElement('slide-animatable') export default class SlideAnimatable extends (mixinBehaviors([NeonAnimatableBehavior], PolymerElement) as new () => PolymerElement) {}Without the type assertion, TypeScript gives the following error:
C:\Users\mike\Documents\GitHub\screensaver\app\elements\slide-animatable\slide-animatable.ts(17,1): error TS2345 Argument of type 'typeof SlideAnimatable' is not assignable to parameter of type '(new () => PolymerElement) & ElementConstructor'.