Const
Validates custom field key names.
Pattern: /^[\dA-Za-z]+(?:\.[A-Za-z][\dA-Za-z]*|_[\dA-Za-z]+)*$/
/^[\dA-Za-z]+(?:\.[A-Za-z][\dA-Za-z]*|_[\dA-Za-z]+)*$/
Rules: alphanumeric characters (a-z, A-Z, 0-9), underscores (_) and dots (.). Each dot must be followed by an alphabetic character. Each underscore must be followed by an alphanumeric character.
valid: `"my_key"`, `"event.type"`, `"my.custom2_key"` Copy
valid: `"my_key"`, `"event.type"`, `"my.custom2_key"`
invalid: `"my-key"`, `"my..key"`, `"_key"`, `".key"` Copy
invalid: `"my-key"`, `"my..key"`, `"_key"`, `".key"`
Validates custom field key names.
Pattern:
/^[\dA-Za-z]+(?:\.[A-Za-z][\dA-Za-z]*|_[\dA-Za-z]+)*$/Rules: alphanumeric characters (a-z, A-Z, 0-9), underscores (_) and dots (.). Each dot must be followed by an alphabetic character. Each underscore must be followed by an alphanumeric character.