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URL Follow Warning Example

URL Follow Warning

These buttons all launch the same published form. Some of them show a warning when clicked in the published version of the doc on iOS Chrome and iOS Safari:
Open Link?
Are you sure you want to follow the link to

This button just opens the URL with no formula. It shows no warning.
This button has a formula, which is just the URL in quotes. It shows no warning.
This button concatenate()s the URL with “”. It shows the warning.
This button builds a URL string using +. It shows the warning.
Added to with +

Bonus: link to outside domain without formula (no warning):
With formula (warning):
Link out to Google with Formula

Want to print your doc?
This is not the way.
Try clicking the ⋯ next to your doc name or using a keyboard shortcut (
) instead.