Your readme file says for SEO:
lazysizes does not hide images/assets from google. No matter what markup pattern you use.
But, I couldn't understand how we does not hide images from google with a markup like that:
<img data-src="image.jpg" class="lazyload" />
That img tag has not a src attribute. How google can read the url of image? Is there any undocumented trick?
muratcorlu
All 5 comments
The problem with google bot is not that google doesn't execture JS. In fact google bot exectues JS. The problem with the google bot and normal lazyloaders is, that google doesn't scroll/interact with your website.
lazysizes detects, whether the user agent is capable to scroll and if not, reveals all images instantly.
aFarkas
on 13 Jan 2016
OK then. I created a pull request to add that explanation to Readme document.
muratcorlu
on 14 Jan 2016
OK but you mention only Google which does read javascript, what about all the bots and social engines which dont?
Why is it not possible (like http://ivopetkov.com/b/lazy-load-responsive-images/ for example) to leave src intact for these?
johndillonuk
on 7 Jul 2016
If you read the documentation you will see that this is also an option: https://github.com/aFarkas/lazysizes#modern-transparent-srcset-pattern
aFarkas
on 7 Jul 2016
Ah brilliant thanks. Really great product thanks for sharing.
johndillonuk
on 8 Jul 2016
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Most helpful comment
The problem with google bot is not that google doesn't execture JS. In fact google bot exectues JS. The problem with the google bot and normal lazyloaders is, that google doesn't scroll/interact with your website.
lazysizes detects, whether the user agent is capable to scroll and if not, reveals all images instantly.