TypeScript 5.5
Inferred Type Predicates
Control Flow Narrowing for Constant Indexed Accesses
The JSDoc @import Tag
Regular Expression Syntax Checking
Support for New ECMAScript Set Methods
union, intersectoin difference symmetricDifference
setのメソッドが増えるのstage 4だったのか
Isolated Declarations
The ${configDir} Template Variable for Configuration Files
Disabling Features Deprecated in TypeScript 5.0
TypeScript 5.0 deprecated the following options and behaviors:
charset
target: ES3
importsNotUsedAsValues
noImplicitUseStrict
noStrictGenericChecks
keyofStringsOnly
suppressExcessPropertyErrors
suppressImplicitAnyIndexErrors
out
preserveValueImports
prepend in project references
implicitly OS-specific newLine