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lazysizes

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High performance (jankfree) lazy loader for images (including responsive images), iframes and scripts (widgets).

github.com/aFarkas/lazysizes

aFarkas/lazysizes

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# lazysizes attribute change / re-initialization extension In case you are changing the ``data-src``/``data-srcset`` attributes of already transformed lazyload elements dynamically, you normally also must re-add the ``lazyload`` class to the element. This extension automatically detects changes to your ``data-*`` attributes and adds the class for you. In case you are using React you can also try the following [react-lazysizes](https://www.npmjs.com/package/react-lazysizes) module as another possible alternative.