The Excel Web App embed option Where this gets interesting is when you start writing your own JavaScript to manipulate that embedded data. Add a Bing Maps control and your spreadsheet is now a ...

(2) Bring information from the web ... Excel Online," Microsoft said in a support document. Users must join the Office Insiders program and install a custom add-in to test or use custom JavaScript ...

Custom JavaScript functions work by creating three files and storing them on an accessible web server ... is used locally by Excel to load your custom function as an add-in.