typescript-eslint 8.66.0

v8.66.0

on Node.js NPM

8.66.0 (2026-08-03)

🚀 Features

• typescript-estree: handle import.defer() as ImportExpression (#12609)

🩹 Fixes

• eslint-plugin: [no-unnecessary-type-conversion] ignore shadowed built-ins (#12590)
• eslint-plugin: [prefer-nullish-coalescing] handle shadowed Boolean calls (#12591)
• eslint-plugin: [no-useless-default-assignment] don't report defaults used by other overloads (#12607)
• eslint-plugin: [no-unnecessary-type-parameters] check MappedType key remapping (#12588)
• eslint-plugin: [class-literal-property-style] preserve type annotations and don't drop decorators (#12617)
• website: list onUnsupportedTypeScriptVersion in parser options (#12585)

❤️ Thank You

• Evyatar Daud @StyleShit
• Kirk Waiblinger @kirkwaiblinger
• Steffen Schroeder
• 송재욱

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