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- This is a configuration file, likely for a JavaScript module loader like RequireJS.
- It defines aliases (short names) for JavaScript files and libraries.
- * Module Loading: This configuration is designed to help a module loader (like RequireJS) efficiently load and manage javascript dependencies.
This is a configuration file, likely for a JavaScript module loader like RequireJS. Let’s break down what it contains:
1. config Section:
* paths: This is the core of the configuration. It defines aliases (short names) for JavaScript files and libraries. This allows your code to refer to libraries using these aliases instead of their full paths. For example:
* "libs/velocity": "1.2.2" means that when your code uses "libs/velocity", the module loader will load the file corresponding to version 1.2.2.
* "jquery": "libs/jquery/jquery-1.11.4" means that when you use "jquery", it will load the specific jQuery version.
* The structure shows a lot of jQuery plugins and other libraries. The libs/ prefix suggests these are located in a libs directory within your project.
* shim: This section is crucial for dealing with libraries that don’t follow the standard asynchronous module definition (AMD) format that requirejs expects. These libraries often rely on global variables or have dependencies that need to be loaded in a specific order.
* Each entry in shim describes a library that needs special handling.
* deps: Lists the dependencies of the library. These dependencies will be loaded before the library itself.For example:
* "fly/libs/backbone-1.0.0":{"deps":["version!fly/libs/underscore","jquery"],"exports":"Backbone"} means Backbone depends on Underscore and jQuery, and those must be loaded first.
* exports: Specifies the global variable name that the library creates. This tells RequireJS how to make the library’s functionality available to other modules. for example:
* "exports":"SockJS" means the sockjs-0.3.4 library creates a global variable named SockJS.
* map: This section defines URL mappings. It’s used to resolve aliases to actual URLs.
* "*":{"adobe-pass":"https://sports.cbsimg.net/js/CBSi/app/VideoPlayer/AdobePass-min.js"} means that whenever you use the alias "adobe-pass", it will be replaced with the specified URL.
* "*":{"facebook":"https://connect.facebook.net/en_US/sdk.js"} maps the alias "facebook" to the Facebook SDK URL.
Key Concepts & Purpose:
* Module Loading: This configuration is designed to help a module loader (like RequireJS) efficiently load and manage javascript dependencies.
* Dependency Management: It clearly defines which libraries depend on others, ensuring they are loaded in the correct order.
* Abstraction: The paths section provides a way to abstract away the actual file paths of libraries, making your code more portable and easier to maintain.
* compatibility: The shim section allows you to use libraries that weren’t originally designed for module loaders.
* URL Resolution: The map section provides a way to map aliases to external URLs.
this file is a blueprint for how a javascript application should load and manage its dependencies, making the code more organized, maintainable, and efficient.
Possible Use Case:
This configuration likely belongs to a web application that uses a lot of javascript libraries, including jQuery plugins, data tables, and potentially a framework like backbone.js. The application probably uses RequireJS to load these libraries on demand,improving performance and code institution. The inclusion of Adobe Pass and Facebook SDK suggests the application integrates with those services.