OptionalHexString
Pattern:
^$|^(0x|0X)[a-fA-F0-9]{1,40}$Example:
{ "title": "Example", "value": "0x01" }Last modified on January 21, 2026
^$|^(0x|0X)[a-fA-F0-9]{1,40}${ "title": "Example", "value": "0x01" }