anchor.diff:          nextSlide.call(this);
       };
   
  -##The world of JS libraries
  +##The world of JS libraries  
  +
   [original webpage](https://www.khanacademy.org/computing/computer-programming/html-css-js/using-js-libraries-in-your-webpage/a/the-world-of-js-libraries "original webpage")
  -There are thousands of JavaScript libraries that you could bring into your webpage, and many aspects of your webpage that they can help you with:
  +There are thousands of JavaScript libraries that you could bring into your webpage,  
  +and many aspects of your webpage that they can help you with:
   
   DOM manipulation
   DOM Events
  
positive.code: 
  #HTML/JS making webpages interactive
  ##Using JS libraries in your webpage
  There are a billion webpages, and many of them are interactive in some way - in fact, many of them are interactive in the same ways.
  
  Now, it's possible that every one of those web developers wrote their own JavaScript code to make a slideshow, but a lot of them probably re-used the same code. As programmers, we should re-use existing code when we can, so that we don't waste our time writing code that another programmer has already written.
  
  In JavaScript, the way we do that is by using a library. A library is a JavaScript file that contains a bunch of functions, and those functions accomplish some useful task for your webpage.
  
  How do we know what functions we can use? We could look at the JavaScript file, if it's short, or better, we could look at the documentation. Most libraries have documentation with a list of available functions or a real-world example.
  
  When a programmer creates a JS library and puts it out into the world, they're purposefully deciding to share it with the world - so that often means they put in the effort to come up with great documentation and examples. Perhaps one day you will decide to create a library of some functionality that you find really useful and share it with the world.
  
  ##Using a JS Library: Slideshow libraryUsing a JS Library: Slideshow library
  
  
negative.code: Routing & navigation
  Accessibility
  Multi-browser support
  Mobile support  
  
  Here's another way I like to think of it - a webpage is made up of the User Interface  
  (HTML & CSS), Interactivity (JS + DOM), and Data (which we often bring in through  
  JS). You can make your data-driven interactive UI without a library, or you can bring  
  in different libraries to help out with different parts. Some libraries will do a lot, some  
  will do just one part:
  Web frameworks
  
  There are some libraries that "do it all" - everything from data retrieval to DOM  
  manipulation to fancy UI widgets. If you use one of these frameworks, you'll  
  typically be bringing a lot of JavaScript into your page, so you'll want to make sure  
  you really need most of what the framework is offering you. For some developers,  
  these frameworks do too much, and they find it better to use smaller libraries with  
  more focused tasks.  
  
  
  jQuery UI
  jQueryMobile
  