EC
TS6671
TypeScriptERRORNotableConfigHIGH confidence

Enforces using indexed accessors for keys declared using an indexed type.

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6671): Enforces using indexed accessors for keys declared using an indexed type.. This diagnostic is emitted by the TypeScript compiler when enforces using indexed accessors for keys declared using an indexed type..

Why it happens
  1. 1Incorrect TypeScript syntax or type usage
  2. 2Type mismatch between declared and actual value
How to reproduce

TypeScript compiler reports TS6671 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6671
// Enforces using indexed accessors for keys declared using an indexed type.

expected output

error TS6671: Enforces using indexed accessors for keys declared using an indexed type.

Fix

Fix the tsconfig.json option

WHEN When a compiler option is invalid or missing

Fix the tsconfig.json option
// tsconfig.json
{
  "compilerOptions": {
    // Review and correct the flagged option
  }
}
// Run: npx tsc --showConfig to see effective config

Why this works

TypeScript validates tsconfig.json options; check the official tsconfig reference for valid values.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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