@qualithm/mqtt-wire - v0.1.5
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    Function isValidTopicFilter

    • Validates a topic filter (used in SUBSCRIBE packets).

      Topic filters:

      • Must be at least 1 character
      • Must not exceed 65535 UTF-8 bytes
      • Single-level wildcard (+) must occupy entire level
      • Multi-level wildcard (#) must be last character and preceded by /

      Parameters

      • filter: string

        The topic filter to validate

      Returns boolean

      true if valid, false otherwise

      MQTT 5.0 ยง4.7.1

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