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 ...

Well, that didn’t take long. A few minutes after writing about the potential risks that might be introduced by Microsoft announcing JavaScript support in Excel custom functions, I wondered out loud ...

So in its current form ... your JavaScript files, and a JSON file that acts as a configuration file. You also need to create a XML file, which acts as a manifest and is used locally by Excel ...