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How to fix the page and allow specific elements to continue moving after the scroll bar reaches the specified position?
How to fix the page and allow specific elements to continue moving after the scroll bar reaches the specified position?
Apr 04, 2025 pm 07:42 PM
Web page scrolling interaction: realize page fixation and element independent movement
Improving user experience is the key to web development. This article discusses a complex but practical requirement: after the scroll bar reaches a specific position, the page body is fixed and specific elements are allowed to continue scrolling, and the page lock is not unlocked until the element is scrolled.
Requirements Analysis
The goal is: when the scroll bar reaches the specified position of the page, the page body stops scrolling, and a specific element can continue to scroll independently, until the element scrolling is over, and the page will not resume normal scrolling.
Solution
This effect requires the help of JavaScript libraries or plug-ins. The following two solutions are recommended:
ScrollMagic: This is a powerful JavaScript library for creating scroll-based interactive effects. It accurately controls the scroll position and triggers animations or other effects when it reaches a specific position. With ScrollMagic, you can set the page scrolling to pause when the scrollbar reaches the specified position, while allowing the target element to continue to move.
Jaralax: Jaralax is mainly used to create parallax scrolling effects, but it can also detect scrolling positions and trigger events when they reach a specific position. In this example, Jarallax can detect the scroll position, fix the page when it reaches the specified position, and control the movement of the target element.
No matter which plugin is used, the implementation steps are basically the same:
- Scroll position detection: Monitor the change in the scroll bar position.
- Page fixed: When the scroll bar reaches the specified position, fix the page to prevent further scrolling.
- Element independent scrolling: Controls the scrolling of the target element until the scrolling is over.
- Page unlock: After the element scrolling is completed, the page is unlocked and normal scrolling is resumed.
Through the above methods, we can create a more attractive user experience and improve the interactivity and visual effects of the web page.
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