fgm24/Assets/Scripts/UI/HealthDisplay.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;

public class HealthDisplay : MonoBehaviour
{
    [SerializeField] string padding = "Health: ";
    [SerializeField] TextMeshProUGUI healthText;
    [SerializeField] HealthComponent healthComponent;

    private void Start()
    {
        healthText.text = padding + healthComponent.currentHealth;
    }

    private void OnEnable()
    {
        healthComponent.OnHealthChange.AddListener(UpdateHealth);
    }

    private void OnDisable()
    {
        healthComponent.OnHealthChange.RemoveListener(UpdateHealth);
    }

    public void UpdateHealth(float prevHealth, float newHealth)
    {
        healthText.text = padding + healthComponent.currentHealth;
    }
}