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In case you are changing the
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. This is very comfortable in case you are using highly dynamic or reactive View libraries like React, Angular, Ember etc..
In case you are using React you can also try the following react-lazysizes module as another possible alternative.
// never try to import *.min.js files import lazySizes from 'lazysizes'; import 'lazysizes/plugins/attrchange/ls.attrchange';