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RequireJS vs Underscore.js: who uses which

Underscore.js is on more sites: 1,226,291 against 109,992 for RequireJS, about 11.1 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

DomainRequireJSUnderscore.js
.com on .com33,986529,209
.de in Germany8,31873,489
.org on .org5,45855,195
.fr in France1,90736,310
.it in Italy2,45835,400
.uk in the UK2,82234,026
.nl in the Netherlands1,88625,391
.pl in Poland1,29323,784

923 sites run both at once.

Questions

Which is more popular, RequireJS or Underscore.js?

Underscore.js is on more sites: 1,226,291 against 109,992 for RequireJS, about 11.1 times as many, across the sites StackGrep has indexed.

Do sites use RequireJS and Underscore.js together?

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

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