What Is Lazy Loading?
Lazy loading, also known as on-demand loading, is an optimization technique in computer programming where a resource, such as a module or a portion of a webpage, is loaded only when it's needed rather than at the initial page load.
In the context of web development, lazy loading often refers to the deferred loading of images, videos, or scripts until they are needed, typically when they enter or are about to enter the viewport. The primary advantage of this technique is that it reduces the amount of data that needs to be fetched, parsed, and rendered when a page is first loaded. This results in faster initial load times, reduced bandwidth usage, and improved user experience, particularly for users on slow or metered internet connections.
Despite the advantages of lazy loading, it's important to be aware of its potential drawbacks. If not implemented properly, lazy loading can disrupt the user experience. For example, if images are loaded too late, users might see blank spaces where images haven't loaded yet.