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Adding JavaScript to your site
How to add JavaScript to your site, details about JavaScript modules and specific usecases.
How to localize with resources in your custom extension.
How to add or remove a language through the locale configuration file.
How to declare the servlet/filter extension to get the current portal.
Creating a custom search connector
How to create a custom search connector to get data from an external resource, for example Wikipedia.
Creating a page layout template
How to create a page layout template that is used in Page Creation Wizard.