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Image lazy loading: Lazysizes is not using #1004

khempenius opened this issue Jun 13, 2019 · 2 comments


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commented Jun 13, 2019

It was reported that LazySizes is not using Intersection Observer.

Relevant content:


@khempenius khempenius added the bug label Jun 13, 2019

@khempenius khempenius self-assigned this Jun 13, 2019

@robdodson robdodson added p3 p2 and removed p3 labels Jun 14, 2019

@addyosmani addyosmani added the fast label Jun 20, 2019


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commented Jun 20, 2019

This is correct. My understanding is you have to use for IO support


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commented Jun 21, 2019

Hi Addy,

I recently asked the library's author about the use of IO and yes, the answer was that you need to user that version (see thread: aFarkas/lazysizes#263 (comment)).

There are quite a few Google's pages where is said that Lazysizes uses IO, without clarifying that is not part of the main file,. I think that can be confusing.


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