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isDateConstraint()

isDateConstraint(schema): schema is DateConstraint

Type guard for DateConstraint. Checks that the schema is a date type and has constraint methods.

Parameters​

schema: GenericSchema​

The schema to check

Returns: schema is DateConstraint​

True if the schema is a DateConstraint with constraint methods

Since​

2.0.0

Example​

const schema = date().min(new Date('2020-01-01'));
if (isDateConstraint(schema)) {
  // schema is narrowed to DateConstraint
  schema.max(new Date('2030-01-01')); // constraint methods available
}