It's too late. We're all doomed. https://docs.microsoft.com/en-us/office/dev/add-ins/tutorials/excel-tutorial?tutorial-step=1 https://docs.microsoft.com/en-us

It's too late. We're all doomed. https://docs.microsoft.com/en-us/office/dev/add-ins/tutorials/excel-tutorial?tutorial-step=1 https://docs.microsoft.com/en-us/office/dev/add-ins/tutorial... Step 1 in the official Excel Add-Ins tutorial includes installing Node and npm.