The basic difference between framework and library is
Framework is a bunch of libraries implemented together to build an application. Example: Angular

Library is a package dedicated to solve specific task. Example: jQuery

The most succinct way I've heard it described is that "you use libraries, but frameworks use you". You can add a library to your project to handle some piece of functionality, but you're still organizing and designing the solution yourself. When you use a framework, everything already fits a regimented pattern, and you're just filling out logic within this already rigid structure.

This makes sense for huge complicated concerns where frameworks like Django or Ruby on Rails dominate - a lot of applications will cover more or less the same basic set of functionality, and it's a pretty complicated set of stuff. These frameworks take care of all that stuff for you, as long as your application fits the mold, so you can spend your time actually coding for the problem.

A library augments code. Ie it adds capabilities.

A frameworks provides the foundation of all your code.

If a library breaks, parts of your codebase may break but the overall codebase will likely still function.

If a framework breaks, nothing will work.

Changing a libraries is low-impact. Changing a framework usually requires a full rewrite.

• library: responds to a single need (how to generate a PDF from an HTML page)
• framework: responds to a business need made of multiple needs (an invoicing app, that let's you save an HTML invoice to PDF)

With F a framework
With L a library

F = { L1, L2, ..., LN }

Thanks for the replies everyone! I will be sure to refer to this post whenever I blog future posts to ensure I use correct terminology.

To me a library is a hammer, a framework is a workshop and API where you ask somebody else to put the nail for you.

In addition the already great answers the best way that I've heard it put is that a framework is an extention of the language where a library is like a chunk of code that you bring in instead of writing.

I would say that a library is an utility that you code calls, and a framework is a set of libraries that call your code in order to provide you a set of functionalities.

Your code controls a "library".
Your code is controlled by a "framework".

All the responses are good in their own ways, so I'll go for brevity.

A library is a component doing a specific task, and you can use it wherever you want.

A framework is a bunch of libraries PLUS an opinionated way to use them, to reduce the boilerplate you have to write.

Typically if you are writing a project from scratch and you install just a library, your software does nothing. But if you install a framework you'll have already something working, like a website with a homepage and a login system.

Let's take baking cake as an example.

Library
You bake your cake on your own, but you probably not going to grow the strawberry which is your ingredients, so you buy it from stores(library)
You control the whole process of baking(programming) to bake a cake(program)

Framework
In this case, you get a cake by buying it from bakery.
In this case, you can decide only few things like the color, flavour or design. The whole process will be controlled by Baker(framework)

Hope this can help you understand it better. ^^

A library is any package you can add to any project structure of your own. A framework is the very project structure you can build your project onto.

I would say they have in common to deal with one specific topic.
Depending on the level of abstraction you either call it framework or library.

Say you have code dealing with web requests, you are looking at a request library.
Say you have code dealing with authorization, you are looking at an auth library.
Say you have code dealing with database related things, you are looking at a db library.

If you have code dealing with building web applications, you are looking at a web framework.
From what was said, it is easy to see that a web framework itself could consist of several libraries, e.g. request, auth and db.

OTOH, I assume those terms emerged somewhere in time and there was no clear definition in the first place.

I view library in the traditional sense. It has books/functions/modules that you can/might not use.
And a framework like a “frame of mind”. Your house was built within a framework and there are certain things you need to do within that framework and those guidelines to build it right

If the maintainers call it a library, it's a library.

If the maintainers call it a framework, it's a framework.

🤣