To achieve smooth scrolling in CSS, 1. You can use scroll-behavior: smooth; to achieve smooth scrolling in the basic anchor point; 2. Use JavaScript's scrollTo() or scrollIntoView() methods to achieve more flexible scrolling control; 3. Combine scroll monitoring and CSS animation to improve the visual experience. These three methods are applicable to different scenarios, and gradually enhance the user experience from simple to complex. The key is to select the appropriate technology combination according to your needs and pay attention to the scope of application.

The scrolling effect looks cool and modern, but it is not that complicated to implement with CSS. Just master a few key points and you can create a silky and smooth scrolling experience.

How to achieve smooth scrolling with CSS

The easiest way to achieve smooth scrolling is to use scroll-behavior property. This property can directly control the behavior of page scrolling, just add a line of code to html or body tag:

 html {
  scroll-behavior: smooth;
}

After this setting, when you jump through the anchor point (such as clicking on the navigation bar link to jump to a part of the page), the scrolling becomes smoother instead of instantly in place. However, it should be noted that it is only effective for anchor jumps and is not suitable for scrolling behavior controlled by JavaScript.

Use JavaScript to finely control scrolling behavior

If you need more flexible controls, such as scrolling to a specific position after the button is clicked, or dynamically adjusting the scroll time, you can use JavaScript's scrollTo() method or scrollIntoView() method.

 window.scrollTo({
  top: 1000,
  behavior: 'smooth'
});

Or let an element automatically scroll to the viewport:

 document.getElementById('section').scrollIntoView({ behavior: 'smooth' });

The advantage of this method is that it can be triggered according to user operations and has higher flexibility. For example, you can trigger scrolling after clicking the button, the page loading is completed, or a certain animation is over.

Improve scrolling experience with CSS animation

While scroll-behavior and JS's behavior: 'smooth' are good enough, if you want to further customize the visuals when scrolling, you can combine CSS transitions and animations to enhance the experience.

For example, adding dynamic effects such as fading and scaling to certain elements during the scrolling process can attract users' attention and make the page more layered. A common practice is to listen for scrolling events, then use JS to determine whether the element enters the viewport, and then add the corresponding animation class name.

 window.addEventListener('scroll', function () {
  const element = document.getElementById('animate-me');
  if (isInViewport(element)) {
    element.classList.add('fade-in');
  }
});

Cooperate with CSS:

 .fade-in {
  opacity: 1;
  transform: translateY(0);
  transition: all 0.6s ease-out;
}

In this way, when scrolling to the specified position, the elements will have animation effects, making the visual experience better.

Basically that's it. The key to smooth scrolling in CSS is to understand the scope of scroll-behavior and how to implement it with JavaScript when more granular control is needed. It seems simple, and the details can greatly improve the user experience.

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