Time

Time fields use x.time() for time values (no date component).

x.time().label("Shift Start")

columnNameAliases

Adds alternate CSV header names for this field.

.columnNameAliases(aliases: string[])

• aliases lists header names that should map to this schema key.
• Aliases are used during column matching alongside the field key and label. They do not change the output object key.

label

Sets the user-facing label shown in the importer.

.label(text: string)

• text sets the label text.

description

Sets help text shown below the field.

.description(text: string)

• text sets the description text.

optional

Allows the field to be empty.

.optional()

• Empty optional values are delivered as null.
• The row object still includes the field key, e.g., { shiftStart: null }.

default

Available after .optional().

.default(defaultValue: unknown | (() => unknown | Promise<unknown>))

• defaultValue can be a static value or a function used when the field is empty.
• Defaults apply to missing values, null, empty strings, and whitespace-only strings.
• When a default is used, it is returned directly instead of validating or refining the empty value.

precision

Sets the number of fractional-second digits.

.precision(precision: number, options?: { message?: string })

• precision sets the precision from 0 to 9, e.g., 3.
• message overrides the validation error text, e.g., "Time must include milliseconds".