Is it possible to measure how long for i've been pressing the regular unity button?

[defapyt]

I want to make an easter egg where, if you’ve been holding on a certain button long enough, you would have unlocked something.

How do I achieve that considering that a regular button only has onClick when fires at the release of the button?

[PixelEyesDev]

Something like this should get you started

using UnityEngine;
using UnityEngine.EventSystems;

public class ButtonPressTimer: MonoBehaviour, IPointerEnterHandler, IPointerExitHandler , IPointerDownHandler, IPointerUpHandler
{
    private bool isInside;
    private float timer;

    //Detect when Cursor enters the GameObject
    public void OnPointerEnter(PointerEventData pointerEventData)
    {
           isInside = true;
    }

    //Detect when Cursor leaves the GameObject
    public void OnPointerExit(PointerEventData pointerEventData)
    {
           isInside = false;
    }

    public void OnPointerDown(PointerEventData pointerEventData)
    {
        timer = Time.time;
    }

    //Detect if clicks are no longer registering
    public void OnPointerUp(PointerEventData pointerEventData)
    {
        if(!isInside)
            return;

        float pressingTime = Time.time - timer;
        Debug.Log("Pressed for " + pressingTime + "s"); 
    }
}