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lazysizes vs PDF.js: who uses which

lazysizes is on more sites: 932,496 against 13,048 for PDF.js, about 71.5 times as many. Here's how they compare across the websites we've indexed, and where each one does best.

Where each one is used

DomainlazysizesPDF.js
.com on .com472,7014,907
.de in Germany50,865828
.jp in Japan35,838217
.ru on .ru34,044290
.org on .org25,003875
.net on .net22,755266
.uk in the UK22,214211
.br in Brazil17,054181

285 sites run both at once.

Questions

Which is more popular, lazysizes or PDF.js?

lazysizes is on more sites: 932,496 against 13,048 for PDF.js, about 71.5 times as many, across the sites StackGrep has indexed.

Do sites use lazysizes and PDF.js together?

285 sites load both. That's often a switch in progress, or two teams picking different tools.

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