The article discusses three modern observer APIs: ResizeObserver, MutationObserver, and IntersectionObserver, which offer improved performance over older methods for monitoring DOM changes. The usage involves creating a new observer using the 'new' keyword, passing in a function to handle changes, observing specific elements, and optionally disconnecting the observer. Despite clear documentation, implementation can become messy without structured coding practices. The author suggests encapsulating observer functionalities in dedicated functions to enhance clarity and usability, particularly for ResizeObserver, making it simpler for developers to implement effectively.
The Resize Observer, Mutation Observer, and Intersection Observers APIs are significantly more performant than their predecessors, providing efficient ways to monitor changes in DOM elements.
Creating a new observer involves utilizing the new keyword, passing an observer function to handle changes, and observing elements via the observe method.
Despite the clarity in the usage steps, the implementation can become confusing without proper structure and comments to guide developers through the process.
By encapsulating observer functionalities into a dedicated function, we can simplify and enhance the usability of the ResizeObserver API in practical applications.
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