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Why am I seeing Modernizr JS errors on Drupal 9 page load

When I load pages on our live site (D9), we see these Modernizr errors from contextual links JS, and the contextual links don’t appear on the site.

Chrome JS Console output

However, Modernizr does appear to be loaded ahead of the contextual links JS, as you can see from the two further screen captures, so I don’t see why RegionView and VisualView should think it is undefined.

Modernizr load time Region View load time

and also the Modernizr object is available in the JS console after page load

Modernizr object in console

I have no idea how to progress solving this. To make things worse, this doesn’t seem to happen on our test sites, which are running on the same codebase.

This article was republished from its original source.
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Why am I seeing Modernizr JS errors on Drupal 9 page load

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