The new Excel API allows developers to load, create, edit, and save Excel sheets, and the Excel Web Editor integrates into existing HTML and JavaScript applications.

Microsoft is opening up Excel to developers with a new JavaScript API. It will let developers use custom data types like images, cards, and arrays.

At its Ignite conference, Microsoft today announced an update to Excel that brings a new JavaScript API to the venerable spreadsheet app. With this new API, developers will be able to create ...