Gadget export

To export the HelloWorld gadget, click on "Download" button, save the downloaded file, go to Special:Import on the destination wiki and upload it. Then add the following to MediaWiki:Gadgets-definition page:

* HelloWorld[ResourceLoader|hidden|default|categories=HelloWorld.js]|HelloWorld.js|HelloWorld.css

You must have appropriate permissions on the destination wiki (including the right to edit system messages) and import from file uploads must be enabled.