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This article compares SVG and raster image loaders (GIF/PNG) for web loading indicators, explaining when and why SVG is generally the better choice.
•SVG uses mathematical instructions instead of pixel data, allowing infinite scaling without quality loss and gzip-friendly compression
•Inlining SVG directly into HTML eliminates HTTP requests entirely, a key advantage since loaders appear while other content is still loading
•SVG loaders are DOM-based, enabling CSS/JS manipulation, prefers-reduced-motion support, and dynamic color changes via currentColor
•GIFs only support binary transparency causing jagged edges, while SVGs support true transparency and smooth edges at any scale
•Complex animated SVG loaders can be under 20KB, whereas equivalent raster GIF animations may reach several megabytes
•Raster loaders remain appropriate for photographic textures, legacy systems that block SVG injection, or simple one-off assets requiring no customization
This summary was automatically generated by AI based on the original article and may not be fully accurate.
CSS-Tricks
WebKit