Built-in types

Primitive types are the building blocks of Foxglove's supported message schemas.

Each field in a message schema has a type. This type can be another message schema, an enum, or one of the primitive types documented below:

boolean

Either true or false.

bytes

Raw binary data, represented as a Uint8Array in JavaScript.

enum

Number that serves as a key in a set of named constants.

float64

64-bit floating-point number.

string

String value encoded as UTF-8.

time

FieldTypeRequiredDescription
secuint32✓Seconds since epoch
nsecuint32✓Additional nanoseconds since epoch

Note: Foxglove's Protobuf schemas represent time values with google.protobuf.Timestamp, which uses seconds and nanos fields. However, in user scripts, message converters, and the rest of Foxglove, the values will appear as sec and nsec fields, for consistency with other data formats.

duration

FieldTypeRequiredDescription
secint32✓Seconds offset
nsecuint32✓Nanoseconds offset (positive direction)

Note: Foxglove's Protobuf schemas represent duration values with google.protobuf.Duration, which uses seconds and nanos fields. However, in user scripts, message converters, and the rest of Foxglove, the values will appear as sec and nsec fields, for consistency with other data formats.

uint32

Non-negative integer value between 0 and 2³²−1.

int32

Integer value between −2³¹ and 2³¹−1.