estransforms

var (
	NewESNextTransformer = transformers.Chain(newUsingDeclarationTransformer, esDecoratorAndClassFields)
	// 2025: only module system syntax (import attributes, json modules), untransformed regex modifiers
	// 2024: no new downlevel syntax
	// 2023: no new downlevel syntax
	// 2022: class static blocks and class fields are handled by newClassFieldsTransformer
	NewES2021Transformer = transformers.Chain(NewESNextTransformer, newLogicalAssignmentTransformer)
	NewES2020Transformer = transformers.Chain(NewES2021Transformer, newNullishCoalescingTransformer, newOptionalChainTransformer)
	NewES2019Transformer = transformers.Chain(NewES2020Transformer, newOptionalCatchTransformer)
	NewES2018Transformer = transformers.Chain(NewES2019Transformer, newObjectRestSpreadTransformer, newforawaitTransformer, newTaggedTemplateLiftRestrictionTransformer)
	NewES2017Transformer = transformers.Chain(NewES2018Transformer, newAsyncTransformer)
	NewES2016Transformer = transformers.Chain(NewES2017Transformer, newExponentiationTransformer)
)