The scrollTop() method in jQuery is used to scroll to a particular portion of the page. Animating this method with the available inbuilt animations can make the scroll smoother. And, subtracting the specified value from it will make the scrolling to stop from the top.
Approach: The hash portion of the anchor link is first extracted using the hash property and its position on the page is found out using the offset() method. The scrollTop() method is then called on this hash value to scroll to that location. This method is animated by enclosing it within the animate() method and specifying the duration of the animation to be used in milliseconds. A larger value would make the animation slower to complete than a smaller value. This will smoothly animate all the anchor links on the page when they are clicked. And then we will subtract the specified value to stop the smooth scrolling to stop from the top.