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Logic that chooses the most appropriate asset URL based on device attributes and browser capabilities.
Distinct from HTML Data Attribute Extraction: Distinct from HTML Data Attribute Extraction: focuses on using extracted attributes to make a selection decision rather than just extracting the data.
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layzr.js is a JavaScript image lazy loading library designed to improve initial page load speed by delaying the download of images until they enter the browser viewport. It functions as a responsive image selector that identifies the most appropriate image source based on browser support and device pixel ratio. The library employs a system for responsive image delivery that evaluates data attributes to select optimal sources. It includes a mechanism for dynamic content tracking, which monitors the document for newly added images to ensure they are automatically added to the loading queue. Th
Implements a system to select the optimal image URL by evaluating custom HTML attributes against device pixel ratios.