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# Changes to extension development

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### Changes from 7.4 to 8.0

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[ZBXNEXT-10445](https://support.zabbix.com/browse/ZBXNEXT-10445) The maximum length of `string` [widget fields](/devel/modules/widgets/configuration#cwidgetfield) has been increased from 2048 to 65535 characters.
Specific `string` fields in [Zabbix native widgets](https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/ui/widgets) now also have their own length restrictions (e.g., set via the `setMaxLength()` function).

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