Selectable.animator

public Animator animator ;

Description

Convenience function to get the Animator component on the GameObject.

using UnityEngine;
using System.Collections;
using UnityEngine.UI; // Required when Using UI elements.

public class ExampleClass : MonoBehaviour
{
    private Animator buttonAnimator;
    public Button button;

    void Start()
    {
        //Assigns the "buttonAnimator" with the button's animator.
        buttonAnimator = button.animator;
    }
}