v3.18.0

Features:

• Source maps for easier debugging
• JSDoc is preserved in declaration files
• Comments are presered in transpiled code
• Everything you need to handle the control flow changes of [email protected]
  • callExpressionAffectsControlFlow to determine whether a CallExpression affects control flow by returning never or asserts
  • hasExhaustiveCaseClauses to determine whether a SwitchStatement's CaseClauses handle every possible value
  • endsControlFlow and getControlFlowEnd take an optional checker parameter to recognize exhaustive SwitchStatements and control flow effects of CallExpressions
• formatPseudoBigInt converts TypeScript's representation of a BigInt to its literal representation as you would write it in your source code
• getAstNodeAtPosition similar to getTokenAtPosition, but only operates on AST Nodes
• removeOptionalChainingUndefinedMarkerType and isOptionalChainingUndefinedMarkerType to handle types originating in an optional chain
• findImports and findImportLikeNodes: prepare for import assertions
• getTsCheckDirective as new name for getCheckJsDirective
• getCheckJsDirective is now deprecated

Bugfixes:

• getUsageDomain: handles NamespaceExport and NamedTupleMember
• getPropertyName: handles parentheses and negative numeric literals, excludes RegExp literals and private identifiers
• getSingleLateBoundPropertyNameOfPropertyName and getLateBoundPropertyNamesOfPropertyName: handles private identifiers
• hasAccessModifier: handles JSDoc access modifier
• hasSideEffects: correctly determines side effects of (static) property initializers
• isExpressionValueUsed: handle nullish coalescing and conditional assignment operators
• canHaveJsDoc: aligned with upstream changes in TypeScript
• isCompilerOptionEnabled:
  • noUncheckedIndexedAccess requires strictNullChecks
  • checkJs implies allowJs
  • emitDeclarationOnly requires declaration
• isInConstContext: handle template string interpolations
• excluded unnecessary files from npm package