How to Create a Smooth Scroll-to-Top Animation Using Native JavaScript?

Native JavaScript Animation for Smooth Scroll to Top

When it comes to user experience, a seamless and intuitive scroll-to-top animation can significantly enhance your web page's functionality. Instead of relying on external libraries like jQuery or Moo, let's explore how to create this animation using pure JavaScript.

The Solution

The provided JavaScript function, scrollTo, offers a cross-browser solution for scrolling to a specified position on the page. It takes three parameters: the element to scroll (typically document.body), the desired scroll position (e.g., 0 for the top of the page), and the duration of the animation in milliseconds.

The function utilizes a recursive technique to smoothly animate the scroll over time. It starts by calculating the difference between the current scroll position and the target position, then increments the scroll position by a small amount (perTick) in each recursive call, until the target position is reached.

Usage

To apply this animation to a link or button, add an event listener that calls scrollTo when clicked. For instance, the following code snippet creates a scroll-to-top animation when the "#scrollme" element is clicked:

<code class="javascript">function runScroll() {
  scrollTo(document.body, 0, 600);
}
var scrollme;
scrollme = document.querySelector("#scrollme");
scrollme.addEventListener("click", runScroll, false);</code>

Demo

Check out the live demo in the provided code snippet to see how the scroll-to-top animation works in action.

Conclusion

By using the provided scrollTo function, you can implement a smooth and cross-browser scroll-to-top animation without the need for external libraries. This pure JavaScript solution allows for greater flexibility and customization in your web development projects.

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