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validate text field - do not allow special characters

giulia72 06 Apr, 2021
Hello
I need block the especials characters like >/>\....
I have seen this topic https://www.chronoengine.com/forums/posts/t108998/validate-text-field-do-not-allow-special-characters?keywords=text%20field%20check
but the solution is for version 7 and I have v5

Does exist a simple solution for v5?

Thanks
Giulia
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