EC
TS1207
TypeScriptERRORNotableSyntaxHIGH confidence

Decorators cannot be applied to multiple get/set accessors of the same name.

Production Risk

Build will fail; resolve before shipping.

What this means

A syntax error (TS1207): Decorators cannot be applied to multiple get/set accessors of the same name.. This diagnostic is emitted by the TypeScript compiler when decorators cannot be applied to multiple get/set accessors of the same name..

Why it happens
  1. 1A decorator is applied incorrectly or to an unsupported target
  2. 2The 'experimentalDecorators' flag may need to be enabled
How to reproduce

TypeScript compiler reports TS1207 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS1207
// Decorators cannot be applied to multiple get/set accessors of the same name.

expected output

error TS1207: Decorators cannot be applied to multiple get/set accessors of the same name.

Fix

Enable experimentalDecorators

WHEN Using legacy decorator syntax

Enable experimentalDecorators
// tsconfig.json
{
  "compilerOptions": {
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  }
}

Why this works

Decorators require the 'experimentalDecorators' flag; TypeScript 5.0+ also supports the TC39 Stage 3 decorator proposal without the flag.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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