This space is for Best practices and various do & don'ts while writing JQuery code. (please drop comments if you (like)/(don't agree with) them or if you would like to contribute to the list)
Even before we start,first question we should answer is
In what cases we should be creating a plugin and in what cases we can simply write code in the page to do all the cool stuff?
In my view one should write a plugin if-
1. There are multiple functions required to be called to achieve one's requirement.Eg we need to convert a table to a grid, now this might require ajax functionality to get the data ,we might require functions to sort, filter etc and hence we should be writing a plugin for this. Now in other case in which we simply need to hide or show an element on click of a button , in that case we don't need to write a plugin for this.
2. In case we might want to extend the functionality in future. Again taking earlier example we might want to add filter/sorting etc to the table to grid functionality , in that case a plugin gives us better way to manage the code.
3. In case we may have various dynamic options which may change how a particular functionality works.In that case its always good to write a plugin and make use of default settings and then override those defaults by providing options while calling the plugin
4. Reusable Code : In case you would want to use the same bit of code across multiple pages/sites, its always good to code the functionality in a plugin and use it anywhere you want, rather than copy pasting the same bit of code again and again on multiple pages.
References :
http://docs.jquery.com/Plugins/Authoring
http://docs.jquery.com/
http://api.jquery.com/
note : i will be updating this post continuously as the scope for the subject is too big to be written in one go.
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