Office Add-Ins and Excel

Check out the new Add-Ins possibilities on the Office Developer site:

https://dev.office.com/docs/add-ins/overview/office-add-ins?product=excel

The JavaScript API for Office offers a JavaScript library to manipulate Office document accross different Office clients such as Word, Excel, Outlook, PowerPoint, Access and Project:

https://dev.office.com/docs/add-ins/develop/understanding-the-javascript-api-for-office?product=excel

But there are also some specifics objects for each clients. for instance, you can manipulate Excel Ranges, Charts, Tables and more:

https://dev.office.com/docs/add-ins/excel/excel-add-ins-javascript-programming-overview?product=excel

The full reference is available here:

https://dev.office.com/docs/add-ins/excel/excel-add-ins-javascript-api-reference?product=excel