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Popper vs Underscore.js: who uses which

Underscore.js is on more sites: 1,226,291 against 740,162 for Popper, about 1.7 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

DomainPopperUnderscore.js
.com on .com294,245529,209
.de in Germany30,27273,489
.org on .org32,05755,195
.fr in France19,49736,310
.uk in the UK21,11734,026
.it in Italy16,39735,400
.br in Brazil22,10617,051
.pl in Poland15,08123,784

41,491 sites run both at once.

Questions

Which is more popular, Popper or Underscore.js?

Underscore.js is on more sites: 1,226,291 against 740,162 for Popper, about 1.7 times as many, across the sites StackGrep has indexed.

Do sites use Popper and Underscore.js together?

41,491 sites load both. That's often a switch in progress, or two teams picking different tools.

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