Google Gadgets

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Google Gadgets

Google Gadgets are dynamic web content that can be embedded on a web page. They can be added to and interact strongly with Google's iGoogle personalized home page (discontinued in November 2013, although iGoogle Gadgets still work on other websites) and the Google Desktop (discontinued in September 2011) application, as well as Google Wave (also no longer supported by Google) and Google Sites. Webmasters can add and customize a gadget to their own business or personal web site, a process called "syndication".
Gadgets are developed by Google and third-party developers using the Google Gadgets API, using basic web technologies such as XML and Java Script.

Multi-user persistent - Wave Gadgets


With the advent of Google Wave (now Apache Wave), gadgets became able to have persistent storage and multi-user capabilities and better state management. Gadgets using Google Wave in this way were simply known as 'Wave Gadgets'. For instance, a game written using a Google Gadget could use Google Wave technology to record a list of users and high scores without having to worry about how to permanently store the scores on a hosted server. The use of Google Wave would give the gadget multi-user and permanent storage capabilities. For example, scores could be stored in a Google Wave hosted permanently by Google at no cost to the user.

As of early 2013, Google Gadgets were deprecated in Google Spreadsheets. Shortly after, they were removed from all spreadsheets.

Technology
Google Gadgets are written in XML and can have HTML and Javascript components, and were able to use Google Wave.

Here is an example of a Hello World program written using Google Gadget technology.






Simple to build

Gadgets are simple HTML and JavaScript applications that can be embedded in webpages and other apps. Built-in JavaScript libraries make it easy to create gadgets that include tabs, persistent storage, dynamic resizing, and more.

Multiple sites

Your gadget can run on multiple sites and products including Gmail, Calendar, Sites, Maps, or any webpage. Write your gadget once, and with minor changes it can run in multiple places.

Reach millions of users

Many gadgets are viewed millions of times per week and generate significant traffic for their authors. Gadgets can also be included in applications listed for sale in the Google Apps Marketplace.




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