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isNumberConstraint()

isNumberConstraint(schema): schema is NumberConstraint

Type guard for NumberConstraint. Checks that the schema is a number type and has constraint methods.

Parameters​

schema: GenericSchema​

The schema to check

Returns: schema is NumberConstraint​

True if the schema is a NumberConstraint with constraint methods

Since​

2.0.0

Example​

const schema = number().min(0);
if (isNumberConstraint(schema)) {
  // schema is narrowed to NumberConstraint
  schema.max(100); // constraint methods available
}