Unity ScrollRect extension method to help with "scroll to item if it's outside of the viewport

ScrollRectExtensions.cs

public static class ScrollRectExtensions
{
    public static Vector2 GetContentPositionToClampChild(this ScrollRect instance, RectTransform child)
    {
        Canvas.ForceUpdateCanvases();

        //  1----2
        //  |    |
        //  |    |
        //  0----3
        Vector3[] viewportCorners = new Vector3[4];
        instance.viewport.GetLocalCorners(viewportCorners);

        Vector3[] childCorners = new Vector3[4];
        child.GetWorldCorners(childCorners);
        for (int i = 0; i < childCorners.Length; i++)
            childCorners[i] = instance.viewport.InverseTransformPoint(childCorners[i]);

        Vector2 offset = Vector2.zero;
        
        if(childCorners[0].y < viewportCorners[0].y)
            offset.y = viewportCorners[0].y - childCorners[0].y;
        else if(childCorners[1].y > viewportCorners[1].y)
            offset.y = viewportCorners[1].y - childCorners[1].y;

        if(childCorners[0].x < viewportCorners[0].x)
            offset.x = viewportCorners[0].x - childCorners[0].x;
        else if(childCorners[3].x > viewportCorners[3].x)
            offset.x = viewportCorners[3].x - childCorners[3].x;

        return (Vector2)instance.content.localPosition + offset;
    }
}