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Is it possible to add an error to a textbox if it's not filled?

MIT App Inventor Help

bug-or-problem

TIMAI2 March 11, 2021, 12:22pm 2

How to ask a question (open new topic) Tutorials and Guides

Before you ask a question / open a new topic please take care of the following points: The forum was previously searched for similar topics / issues. Give a precise (detailed) description of the issue / bug, the goal. Show the (relevant) blocks (images, screenshots of blocks in high quality). Debug your blocks (connect to Companion and right mouse click: → Do it). Name the Android / iOS version running on your (test) device. Do not open multiple threads on the same topic. If you haven't al…

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