By default, readxl displays a progress spinner unless
one of the following is
The spinner is explicitly disabled by setting
options(readxl.show_progress = FALSE).
The code is run in a non-interactive session (
The code is run by knitr / rmarkdown.
The code is run in an RStudio notebook chunk. readxl uses the progress package under-the-hood and therefore is also sensitive to any options that it consults.