>Hi,
>
>I am a little confused when looking at the Bootstrap v5.0 page online. So, I wonder if anyone is using Bootstrap and can share the code to put in the Head section of a page to have Bootstrap (CDN) and jQuery (CDN). At this point I only want these two libraries. And I do not want to download/install any code on the server; hence the CDN option.
>
>Please let me know if you have a simple content for a Head section. This way, I can create test a simple code.
>
>TIA

I found that referencing Bootstrap 5 with cdn.jsdelivr.net DOES NOT work.

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet">

Referencing Bootstrap 3.4.1 with maxcdn. DOES work.

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">

Anybody knows why? Do you know if there is a CDN for Bootstrap 5 with maxcdn.?

UPDATE. Definitely something is wrong with the Bootstrap 5 CDN (above) or Apple blocks it.
I found a W3SCHOOL page

https://www.w3schools.com/bootstrap5/tryit.asp?filename=trybs_default&stacked=h

and I created an email based on this page. Exact copy of this page. And the page does not work on my iPhone. That is, the content is not responsive on iPhone. Even though the page is responsive when running it from the Chrome.