Unity Post Process Volume blend animation

using System.Collections;
using UnityEngine;
using UnityEngine.Rendering.PostProcessing;

public class VolumeBlendAnimation : MonoBehaviour
{
    [Tooltip("Assign a volume that has effects set up on it\n\nThey need to be at full intensity")]
    public PostProcessVolume volume;
    [Tooltip("In case the volume should be disabled during edit mode, enable this checkbox to automatically enable it when entering play mode")]
    public bool enableVolumeOnAwake;
    public float fadeTime = 1f;

    [Header("Debug")]
    [Range(0f, 1f)]
    public float progress;

    void OnEnable()
    {
        if(enableVolumeOnAwake) volume.enabled = true;

        StartCoroutine(Fade(false));
    }

    private void OnDisable()
    {
        StartCoroutine(Fade(true));
    }

    IEnumerator Fade(bool invert)
    {
        var elapsedTime = 0f;

        while (elapsedTime < fadeTime)
        {
            elapsedTime += Time.deltaTime;

            SetProgress((invert ? 1f-(elapsedTime / fadeTime) : (elapsedTime / fadeTime)));

            yield return null;
        }
    }

    private void SetProgress(float t)
    {
        progress = Mathf.Clamp01(t);

        volume.weight = progress;
    }
}