How to validate number of digits limit in integer field?

Question

Hello,

I am trying to create a integer field for entering phone numbers and I want to add a validation so that it would not allow to save the value if
it exceeds 10 digits. The optional size parameter seems to have no effect. How can I achieve this?

Thank You.

Ludo - 21South · Answer

Simplest way I think would be to use an onchange-method on the field. If the value is > 10, clear the field and display a message.

The docs mention this:

on_change:

Default value for the on_change attribute in the view. This will launch a function on the server when the field changes in the client. For example, on_change="onchange_shop_id(shop_id)".

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