Strong mode

Strong mode is enabled with mode: "strong" option.

It is the recommended mode of operation.

It's enabled by default for parser, but not enabled by default for validator for compatibility.

Effect

Strong mode enforces the following options:

requireSchema
requireValidation
requireStringValidation
complexityChecks

Strong mode enables the following options by default (overridable):

forbidNoopValues

Strong mode disables and forbids the following options:

weakFormats

Strong mode forbids the following options:

allowUnusedKeywords
allowUnreachable
$schemaDefault

See options documentation for more information on those.