In order to answer this question, we have to understand:
- What is meant by Application and what is meant by Library?
- How to create Libraries
What is Meant by Application and What is Meant by Library?
Live examples for applications are facebook.com, Microsoft Office, Visual Studio, an inventory management system, etc. Application caters to end user requirements. For creating such application, we use some already created libraries and achieve quick development, surety of proper working (because libraries will be pre-tested and proven).
How Can We Create Library?
We start with some tools like Visual Studio where we will write some code using some programming languages like C# or VB.NET and then we call it as library.
- If we can call that code block as self-contained code block
- If we can use the code written there in more than one application without repeating a single line of redundant code
- If it is not self-executable
It’s a very good question why we should use jQuery and not something else?
- It's lightweight - jQuery is a lightweight library and because of its lightweight characteristics. it provides high performance, it’s a very well written code which is about 32 kb size.
- Easy Dom traversing - With the help of jQuery, we can find parent or child of any HTML element at any time without writing much code.
- Easy Plugins -jQuery is highly extensible. It lets you extend the existing behavior and even you can easily add new behaviors. You can easily find huge plugins over internet.
- Tested, commonly used and documented – Because of huge popularity, not only can you get answers for most of the jQuery questions easily in forums but also availability of huge documentation makes learning jQuery very easy.
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