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 coda.io?

This button just opens the URL with no formula. It shows no warning.

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Just URL

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This button has a formula, which is just the URL in quotes. It shows no warning.

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Just URL

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This button concatenate()s the URL with “”. It shows the warning.

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Concatenated

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This button builds a URL string using +. It shows the warning.

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Added to with +

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Bonus: link to outside domain without formula (no warning):

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Link out to Google

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With formula (warning):

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Link out to Google with Formula

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Want to print your doc?
This is not the way.

Try clicking the ⋯ next to your doc name or using a keyboard shortcut (

CtrlP

) instead.