EC
TS6658
TypeScriptERRORNotableConfigHIGH confidence

Specify how TypeScript looks up a file from a given module specifier.

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6658): Specify how TypeScript looks up a file from a given module specifier.. This diagnostic is emitted by the TypeScript compiler when specify how TypeScript looks up a file from a given module specifier..

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

TypeScript compiler reports TS6658 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6658
// Specify how TypeScript looks up a file from a given module specifier.

expected output

error TS6658: Specify how TypeScript looks up a file from a given module specifier.

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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