Validate fied with custom javascript code

Question

Hello. I'm trying to write a custom validation code in javascript in order to display an error message when selecting the value
'Autre' in my select field. But it doesn't work. Does someone have an idea to resolve my problem? Look at my screenshoots.

Sincerely
Validate fied with custom javascript code image 1

Validate fied with custom javascript code image 1

Validate fied with custom javascript code image 2

hilmata · Accepted Answer

Hello. I'm trying to write a custom validation code in javascript in order to display an error message when selecting the value
'Autre' in my select field. But it doesn't work. Does someone have an idea to resolve my problem? Look at my screenshoots.

Sincerely
Validate fied with custom javascript code image 1

Validate fied with custom javascript code

Validate a form field with custom JavaScript when a specific option is selected.

Overview