NativeScript/tests/app/ui/lifecycle/pages/button-counter.ts

import * as button from "@nativescript/core/ui/button";
import { colorProperty, backgroundInternalProperty, fontInternalProperty } from "@nativescript/core";

export class Button extends button.Button {
    nativeBackgroundRedraws = 0;
    backgroundInternalSetNativeCount = 0;
    fontInternalSetNativeCount = 0;
    colorSetNativeCount = 0;
    colorPropertyChangeCount = 0;

    constructor() {
        super();
        this.style.on("colorChange", () => this.colorPropertyChangeCount++);
    }

    [backgroundInternalProperty.setNative](value) {
        this.backgroundInternalSetNativeCount++;

        return super[backgroundInternalProperty.setNative](value);
    }
    [fontInternalProperty.setNative](value) {
        this.fontInternalSetNativeCount++;

        return super[fontInternalProperty.setNative](value);
    }
    _redrawNativeBackground(value: any): void {
        this.nativeBackgroundRedraws++;
        super._redrawNativeBackground(value);
    }
    [colorProperty.setNative](value) {
        this.colorSetNativeCount++;

        return super[colorProperty.setNative](value);
    }
}
Button.prototype.recycleNativeView = "never";