![]() And the CDN have operating software that says "using this set of colors, put together elements of those colors together in only these ways". ![]() People think Mobirise (or CC Site Designer, or whatever) use "Bootstrap" - WRONG!!!! They use a subset of it - rather than have the developers of those programs be forced to deal with every different permutation and combination of CSS elements, they identify a workable subset of them. BUT BSS, or any "builder" program has to place some constraints on those relationships. ![]() Another change is that you're allowed to customise your own parameters for the bits and pieces and their relationships with each other. One of the changes from Bootstrap 4 to Bootstrap 5 is that you're supplied with a broader range of colors to use. A CSS framework is a library (of routines / data - like different colors) allowing for easier, more standards-compliant web design using the Cascading Style Sheets language. Pardon me for a (very) rough and ready answer - a Content Delivery Network (CDN) is something that delivers content, in this case instructions to deliver information within a set of constraints (say colored "bits" - lines, dots, etc) in a set of pre-defined ways - that's a "framework" where the information is a computer's operations upon that information. I suppose you missed my comment (elsewhere?) about the next version of Bootstrap - Bootstrap 5, or even " is it worthwhile learning Bootstrap in 2020?" What do you think a (CSS) Framework is? Bootstrap is a (CSS) Framework, remember? Better yet, what's a "CDN" - look it up in Wikipedia, and think about it.
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